Researcher basic information

• Ph. D., The Graduate University for Advanced Studies, Mar. 2017

• https://researchmap.jp/hashi-sh_n?lang=en

• https://jglobal.jst.go.jp/detail?JGLOBAL_ID=201401073182742290

• 201401073182742290

• Optical chirality（Lipkin's Zilch）
• Orbital angular momentum
• Spin angular momentum
• Optical angular momentum
• Helical dichroism
• Vortex dichroism
• Circular dichroism
• Optical vortex
• 円偏光発光
• 偏光解析
• 光物性
• ナノ光学
• Nanostructures
• Optical Activity
• Chirality
• Scanning Near-field Optical Microscope
• Plasmon
• Physical Chemistry

• Nanotechnology/Materials, Applied condensed matter physics
• Nanotechnology/Materials, Analytical chemistry
• Natural Science, Mathematical physics and fundamental theory of condensed matter physics
• Nanotechnology/Materials, Fundamental physical chemistry
• Natural Science, Semiconductors, optical properties of condensed matter and atomic physics

• Master's degree program, Graduate School of Information Science and Technology
• Doctoral (PhD) degree program, Graduate School of Information Science and Technology

Research activity information

• Sep. 2017, The Graduate University for Advanced Studies (sokendai), Research Award of The Graduate University for Advanced Studies (sokendai)
  Shun Hashiyada
• Oct. 2016, Student Award, OSJ-OSA Joint Symposia on Plasmonics and Digital Photonics
• Sep. 2016, The Best Poster Presentation Award, The 14th International Conference on Near-Field Optics, Nanophotonics and Related Techniques (NFO-14)
  Shun Hashiyada, International society
• Oct. 2015, Best Poster Awards at the Annual Meeting of the Japan Society for Molecular Science
  Shun Hashiyada, Japan society, Japan
• Apr. 2015, The Chemical Society of Japan, Student Presentation Award 2015
  Shun Hashiyada, Japan society
• Mar. 2014, Tokai Branch of the Chemical Society of Japan, Outstanding Student Prize
  Shun Hashiyada, Japan society
• Feb. 2014, Asian CORE Winter School, Outstanding Oral Award 2014
  Shun Hashiyada, International society
• Nov. 2013, The Optical Society of Japan, Optics & Photonics Japan Best Presentation Award 2013
  Shun Hashiyada, Japan society

• Matrix-resolved circular dichroism in twisted gold nanorod dimers: strong intrinsic circular dichroism with suppressed circular conversion dichroism
  Masaki Onodera; Shun Hashiyada; Yoshito Y. Tanaka
  Journal of the Optical Society of America B, 43, 10, C9, C17, Optica Publishing Group, 14 May 2026, [Peer-reviewed], [Invited], [Corresponding author]
  Scientific journal, Circular dichroism (CD) is widely used to detect structural chirality in molecules and nanostructures, yet in anisotropic systems its interpretation can be obscured by polarization conversion. To clarify the physical origin of CD in three-dimensional twisted gold nanorod dimers (TNDs), we experimentally retrieve the full complex Jones matrix in the circular-polarization basis for multiple twist angles, where conversion appears as off-diagonal elements. The TNDs exhibit a strong asymmetry between the diagonal elements while maintaining nearly symmetric conversion amplitudes, yielding pronounced intrinsic CD with suppressed circular conversion dichroism (CCD). A coupled-oscillator model reproduces this Jones-matrix symmetry and explains the twist-angle dependence, establishing a matrix-resolved criterion for distinguishing intrinsic CD from conversion-channel contributions (CCDs) in anisotropic nanophotonic systems., 51499212
• Metasurface analogues of molecular diastereomers from hierarchical multiscale chiral interactions with biomolecules
  Dominic J. P. Koyroytsaltis-McQuire; Shailendra K. Chaubey; Rahul Kumar; Paula L. Lalaguna; Tamas Javorfi; Giuliano Siligardi; Affar Karimullah; Adrian J. Lapthorn; Yoshito Y. Tanaka; Shun Hashiyada; Nikolaj Gadegaard; Malcolm Kadodwala
  Nature Communications, Springer Science and Business Media LLC, 22 Apr. 2026, [Peer-reviewed]
  Scientific journal, Abstract
  
  Chirality occurs at molecular and nanoscales, but these forms of handedness are usually treated independently. We demonstrate a hybrid chiral state, termed a meta-diastereomer, in which molecular chirality and nanoscale structural chirality are coupled at an interface to determine the optical response, with distinct states defined by the relative handedness of the two components, as in molecular diastereomers. Unlike strategies that rely on enhanced near-field optical chirality, the coupling here arises from a charged, polarisable interfacial layer that perturbs electromagnetic boundary conditions. The resulting reduction in symmetry renders linear optical observables stereostructurally informative, in the same way that molecular diastereomers can be distinguished using non-chiral measurement techniques. This behaviour distinguishes native versus denatured protein layers and differentiates protein-protein binding states in a model antigen-antibody system. These results identify electromagnetic boundary conditions as a mechanism by which chirality can be transmitted across length scales and provide a boundary-condition-based framework for hierarchical chirality at biomolecule-metasurface interfaces.
• Infrared optical constants n , κ , and absorption of topological insulator BiSb thin films determined by the reflectance-transmittance technique
  Hajime Nishiyama; Pham Nam Hai; Tomohiro Amemiya; Shun Hashiyada; Yukio Kawano
  Optics Letters, 51, 7, 1864, 1864, Optica Publishing Group, 24 Mar. 2026, [Peer-reviewed]
  Scientific journal, In this work, we measure the infrared optical constants ( n , κ ) of topological insulator BiSb thin films using the reflectance-transmittance method. Using the obtained ( n , κ ), we reveal that Bi, Bi _0.9 Sb _0.1 , and Bi _0.85 Sb _0.15 show absorption of about 30% for film thicknesses around 20 nm and a large refractive index ranging from 6 to 9 in the infrared region. Our results suggest that BiSb has strong potential as a material for MIR detectors.
• Unveiling orbital optical chirality through multipolar chiral light–matter interaction
  Shun Hashiyada; An’an Wu; Yoshito Y. Tanaka
  Optica, 13, 2, 353, 353, Optica Publishing Group, 17 Feb. 2026, [Peer-reviewed], [Lead author, Corresponding author]
  English, Scientific journal, Chiral light–matter interactions are central to optical spectroscopy and nanophotonics, yet they are conventionally understood as arising from electric–magnetic dipolar interference driven by light with spin angular momentum. Here, we show that optical chirality can also originate from the orbital angular momentum (OAM) of light, enabling chiral responses mediated by higher-order multipolar interactions. Using a single twisted gold nanorod dimer as a minimal chiral platform, we perform spatially and spectrally resolved measurements of chiral dichroism under tightly focused circularly polarized optical vortex beams carrying spin and orbital angular momenta of the same sign. We observe qualitatively distinct chiral responses at the vortex center and in the annular region of the beam. In particular, OAM-sign-dependent quadrupolar resonances emerge at the beam center, where conventional spin-induced optical chirality vanishes. Reciprocity tests and angular momentum dissipation analysis confirm that this response is a genuine chiral interaction dominated by orbital, rather than spin, angular momentum. These results establish the existence of a distinct form of optical chirality, referred to as orbital optical chirality, and open opportunities for probing multipolar chiral light–matter interactions beyond the dipolar paradigm.
• Optical Activity Modulation in Chiral Metasurfaces via Structured Light
  Paula L. Lalaguna; Shun Hashiyada; Nikolaj Gadegaard; Jörg B. Götte; Stephen M. Barnett; Kayn A. Forbes; Yoshito Y. Tanaka; Malcolm Kadodwala
  Nano Letters, 25, 12393, 12398, American Chemical Society (ACS), 05 Aug. 2025, [Peer-reviewed], [Corresponding author]
  English, Scientific journal
• Conservation law for angular momentum based on optical field derivatives: Analysis of optical spin-orbit conversion
  Shun Hashiyada; Yoshito Y. Tanaka
  Physical Review Research, 7, 2, American Physical Society (APS), 04 Jun. 2025, [Peer-reviewed], [Lead author, Corresponding author]
  English, Scientific journal, We present a theoretical framework for analyzing the loss of optical angular momentum (AM), including spin AM (SAM) and orbital AM (OAM) components, in light-matter interactions. Conventional SAM and OAM conservation laws rely on transverse field components, neglecting longitudinal fields and limiting applicability to a vacuum. Our approach defines optical AM using time derivatives of the electric and magnetic fields, yielding a gauge-invariant formulation that includes both transverse and longitudinal components and explicitly incorporates charge and current densities into SAM and OAM conservation laws. This enables a more complete description of AM dissipation in materials. We apply this framework to analyze spin-orbit conversion (SOC) in two scenarios: the scattering of circularly polarized (CP) Gaussian beams by a gold nanoparticle and focusing of CP Gaussian beams and linearly polarized optical vortex beams by a lens. The results show that SOC depends on particle size and polarization, with notable OAM loss in larger particles and CP Gaussian beam focusing. This framework enables the evaluation of previously overlooked SAM and OAM losses, providing a powerful tool for studying systems in which the analysis of AM losses is intrinsically important, such as chiral materials, as well as for designing photonic devices and exploring light-matter interactions at the nanoscale.
  
  Published by the American Physical Society 2025
• The Electromagnetic Enantiomer: Chiral Nanophotonic Cavities for Inducing Chemical Asymmetry
  Kumar, Rahul; Trodden, Ben; Klimash, Anastasia; bousquet, manon; Chaubey, Shailendra; Russell, Ben; Fairbairn, Nicola; Wynne, Klaas; Karimullah, Affar; Gadegaard, Nikolaj; Skabara, Peter; Hedley, Gordon; Hashiyada, Shun; Movsesyan, Artur; Govorov, Alexander; Kadodwala, Malcolm
  ACS Nano, Jul. 2024, [Peer-reviewed]
  English, Scientific journal
• Rapid modulation of left- and right-handed optical vortices for precise measurements of helical dichroism
  Shun Hashiyada; Yoshito Y. Tanaka
  Review of Scientific Instruments, 95, 5, 053101, AIP Publishing, 01 May 2024, [Peer-reviewed], [Lead author, Corresponding author]
  Scientific journal, Helical dichroism (HD), which is defined as the difference in optical absorption between chiral pairs of lights involving left-handed (LH) and right-handed (RH) optical vortices (OVs) carrying orbital angular momentum (OAM), is a promising way to characterize chiral materials. In the current major methods of OV generation using spatial light modulators (SLMs), the speed of OAM switching is typically as slow as 100 Hz, which is comparable to low-frequency noise, making precise chiral detection difficult. Here, we theoretically propose and experimentally demonstrate a rapid modulation of the LH and RH OVs at around 50 kHz. This modulation is achieved through a rapid modulation of circularly polarized lights carrying spin angular momentum (SAM), combined with a SAM–OAM conversion technique. We establish a theory not only for rapid OV modulation but also for HD measurements using the modulated OVs. We experimentally verify the theory using helical phase holograms drawn on a SLM as a pseudo-HD active sample. Our work addresses the limitations of current methods and offers a new avenue for precise HD measurements, paving the way for the development of sensitive chiral-optical spectroscopy techniques.
• Circular dichroism of pseudo-two-dimensional metal nanostructures: Rotational symmetry and reciprocity
  Kensaku Endo; Shun Hashiyada; Tetsuya Narushima; Yoshihiko Togawa; Hiromi Okamoto
  The Journal of Chemical Physics, 159, 23, AIP Publishing, 19 Dec. 2023, [Peer-reviewed]
  English, Scientific journal, Circular dichroism (CD) spectra for pseudo-two-dimensional chiral nanomaterials were systematically investigated and analyzed in relation to the rotational symmetry of the nanomaterials. Theoretically, an ideal two-dimensional chiral matter is CD inactive for light incident normal to the plane if it possesses threefold or higher rotational symmetry. If the matter has two- or onefold rotational symmetry, it should exhibit CD activity, and the CD signal measured from the back side of the matter is expected to be inverted from that measured from the front side. For pseudo-two-dimensional chiral gold nanostructures fabricated on glass substrates using electron beam lithography, matter with fourfold rotational symmetry is found to be CD active, even when special care is taken to ensure that the optical environments for the front and back sides of the sample are equivalent. In this case, the CD signal measured from the back side is found to be almost exactly the same as that measured from the front side. It is revealed that the observed chiro-optical behavior arises from three-dimensional chiral characteristics due to differences in the surface shape between the front and back sides of the structures. For matter that is two- or onefold rotationally symmetric, the CD signal measured from the back side is not coincident with that from the front side. For certain wavelength regions, the CD signals measured from the front side and back side are observed to be similar, while at other wavelengths, the inverted component of the CD signals is found to dominate. The observed CD spectral behavior for reciprocal optical measurement configurations is considered to be determined by a balance between the in-plane isotropic and anisotropic components of the chiral permittivity.
• Near-Field Probing of Optical Superchirality with Plasmonic Circularly Polarized Luminescence for Enhanced Bio-Detection
  Victor Tabouillot; Rahul Kumar; Paula L. Lalaguna; Maryam Hajji; Rebecca Clarke; Affar S. Karimullah; Andrew R. Thomson; Andrew Sutherland; Nikolaj Gadegaard; Shun Hashiyada; Malcolm Kadodwala
  ACS Photonics, American Chemical Society (ACS), 20 Oct. 2022, [Peer-reviewed]
  Scientific journal
• Optical gradient force on chiral particles
  Junsuke Yamanishi; Hyo-Yong Ahn; Hidemasa Yamane; Shun Hashiyada; Hajime Ishihara; Ki Tae Nam; Hiromi Okamoto
  Science Advances, 8, 38, eabq2604, American Association for the Advancement of Science (AAAS), 23 Sep. 2022, [Peer-reviewed], [International Magazine]
  English, Scientific journal, When a chiral nanoparticle is optically trapped using a circularly polarized laser beam, a circular polarization (CP)–dependent gradient force can be induced on the particle. We investigated the CP-dependent gradient force exerted on three-dimensional chiral nanoparticles. The experimental results showed that the gradient force depended on the handedness of the CP of the trapping light and the particle chirality. The analysis revealed that the spectral features of the CP handedness–dependent gradient force are influenced not only by the real part of the refractive index but also by the electromagnetic field perturbed by the chiral particle resonant with the incident light. This is in sharp contrast to the well-known behavior of the gradient force, which is governed by the real part of the refractive index. The extended aspect of the chiral optical force obtained here can provide novel methodologies on chirality sensing, manipulation, separation, enantioselective biological reactions, and other fields.
• Roles of superchirality and interference in chiral plasmonic biodetection
  Cameron Gilroy; Shun Hashiyada; Kensaku Endo; Affar Shahid Karimullah; Laurence D. Barron; Hiromi Okamoto; Yoshihiko Togawa; Malcolm Kadodwala
  The Journal of Physical Chemistry C, 123, 24, 15195, 15203, May 2019, [Peer-reviewed], [Corresponding author]
  English, Scientific journal
• Spectral properties of chiral electromagnetic near fields created by chiral plasmonic nanostructures
  Shun Hashiyada; Kensaku Endo; Tetsuya Narushima; Yoshihiko Togawa; Hiromi Okamoto
  Journal of Physics: Conference Series, 1220, 1, 012050, May 2019, [Peer-reviewed], [Lead author, Corresponding author]
  English, International conference proceedings
• Active control of chiral optical near fields on a single metal nanorod
  Shun Hashiyada; Tetsuya Narushima; Hiromi Okamoto
  ACS Photonics, 6, 3, 677, 683, Jan. 2019, [Peer-reviewed], [Lead author, Corresponding author]
  English, Scientific journal
• Circularly polarized photoluminescence from achiral dye molecules induced by plasmonic two-dimensional chiral nanostructures
  Khai Q Le; Shun Hashiyada; Masaharu Kondo; Hiromi Okamoto
  The Journal of Physical Chemistry C, 122, 43, 24924, 24932, American Chemical Society (ACS), Oct. 2018, [Peer-reviewed]
  English, Scientific journal
• Nanoscale chiral surface relief of azo-polymers with nearfield OAM light
  Keigo Masuda; Ryo Shinozaki; Yoshinori Kinezuka; Junhyung Lee; Seigo Ohno; Shun Hashiyada; Hiromi Okamoto; Daisuke Sakai; Kenji Harada; Katsuhiko Miyamoto; Takashige Omatsu
  Optics Express, 26, 17, 22197, 22207, The Optical Society, Aug. 2018, [Peer-reviewed]
  English, Scientific journal
• How an Understanding of the Nature of a Science Café Promotes a Joint Initiative Communication Style
  Motoko Okumoto; Shun Hashiyada; Akihiro Takahashi; Nyubo Abe
  Journal of Science Education in Japan, 42, 131, 139, Jul. 2018, [Peer-reviewed]
  Japanese, Scientific journal
• Imaging Chirality of Optical Fields near Achiral Metal Nanostructures Excited with Linearly Polarized Light
  Shun Hashiyada; Tetsuya Narushima; Hiromi Okamoto
  ACS Photonics, 5, 4, 1486, 1492, American Chemical Society (ACS), 25 Jan. 2018, [Peer-reviewed], [Lead author]
  Scientific journal
• Optical Activity Governed by Local Chiral Structures in Two-Dimensional Curved Metallic Nanostructures
  Tetsuya Narushima; Shun Hashiyada; Hiromi Okamoto
  CHIRALITY, 28, 7, 540, 544, Jul. 2016, [Peer-reviewed]
  English, Scientific journal
• Local Optical Activity in Achiral Two-Dimensional Gold Nanostructures
  Shun Hashiyada; Tetsuya Narushima; Hiromi Okamoto
  JOURNAL OF PHYSICAL CHEMISTRY C, 118, 38, 22229, 22233, Sep. 2014, [Peer-reviewed], [Lead author]
  English, Scientific journal
• Nanoscopic Study on Developing Optical Activity with Increasing Chirality for Two-Dimensional Metal Nanostructures
  Tetsuya Narushima; Shun Hashiyada; Hiromi Okamoto
  ACS PHOTONICS, 1, 8, 732, 738, Aug. 2014, [Peer-reviewed]
  English, Scientific journal
• Strong Localized Optical Activity in Two-Dimensional Metal Nanostructures : Near-Field Circular Dichroism Imaging
  Tetsuya Narushima; Shun Hashiyada; Hiromi Okamoto
  HYOMENKAGAKU, 35, 6, 312, 318, The Surface Science Society of Japan, Jun. 2014, [Peer-reviewed]
  Japanese, Scientific journal, Nanostructures with chiral shapes show optical activity. The optical activity of the chiral nanostructure may be regarded approximately as an integration of contributions from optical activity of local sites over the entire nanostructure. In this article, we describe our recent experimental efforts to realize 100-nm-scale spatially resolved circular dichroism (CD) imaging. The results of CD imaging for S-shaped gold nanostructure are compared with the macroscopically obtained CD spectra. Local CD signals of both handednesses coexisted in the individual nanostructure, and the spatial distribution of the CD reflected the chiral symmetry of the nanostructure. When the local CD signal is integrated over the entire nanostructure, its value was approximately 1% of the maximum local CD signal, which roughly coincided with the macroscopic CD signal. This indicates that there are possibly prominent local CD signals even if only a tiny CD signal is observed in the macroscopic measurements of optical activity for nanostructured samples.

• Chiral Optical Responses
  Shun Hashiyada; Hiromi Okamoto, Solid state physics, 59, 11, 79, 94, Nov. 2024, [Peer-reviewed], [Invited], [Lead author, Corresponding author], [Domestic magazines]
  This article reviews the history and development of chirality in materials and light, highlighting key discoveries, the role of polarized light, and advancements in chiral optical responses. It covers fundamental principles and explores advanced research on chiral optical responses to circularly polarized light, chiral optical near­field, and optical vortices., AGNE Gijutsu Center, Japanese, Introduction other
• Spectral properties of chiral electromagnetic near fields created by chiral plasmonic nanostructures
  Shun Hashiyada; Kensaku Endo; Tetsuya Narushima; Yoshihiko Togawa; Hiromi Okamoto, 2018 Joint Symposia on Optics (Optical Society of America, 2018), paper 30aCJ4, Part F125-OPJ 2018, Oct. 2018
  English, Introduction international proceedings
• Active polarization control of optical fields localized on gold nano-rectangles
  Shun Hashiyada; Tetsuya Narushima; Hiromi Okamoto, Proceedings of SPIE - The International Society for Optical Engineering, 10712, 107121S, 2018
  SPIE, English, Introduction international proceedings
• Imaging Chiral Plasmons
  Hiromi Okamoto; Shun Hashiyada; Yoshio Nishiyama; Tetsuya Narushima, SAP-OSA Joint Symposia 2017 Abstracts (Optical Society of America, 2017), paper 5a_A410_1, Part F78-JSAP 2017, Sep. 2017
  English, Introduction international proceedings
• Generation of Chiral Optical Near-Fields with Non-Chiral Metallic Nanostructures and Linearly Polarized Light
  Shun Hashiyada; Tetsuya Narushima; Hiromi Okamoto, OPTICAL MANIPULATION CONFERENCE, 10252, 1025214, 2017
  English, Introduction international proceedings

• 〔Major achievements〕Conservation Laws of Spin and Orbital Angular Momentum of Light in Light–Matter Interactions
  Shun Hashiyada
  JPS 2026 Spring Meeting, Sumposium Session "Spatiotemporal control of light for new functionalities", 25 Mar. 2026, Invited oral presentation
  25 Mar. 2026 - 25 Mar. 2026, [Invited]
• RT法によるBiSbの赤外光学定数および吸収の評価
  西山 黎; ファムナムハイ; 雨宮 智宏; 橋谷田 俊; 河野 行雄
  第73回応用物理学会春季節学術講演会, 18 Mar. 2026
  15 Mar. 2026 - 18 Mar. 2026
• キラルMie空孔の円偏光励起フォトルミネッセンス強度非対称性
  新家 寛正; 橋谷田 俊; 後藤 和泰; 長谷川 友子; 押切 友也; 中川 勝
  第73回応用物理学会春季節学術講演会, 17 Mar. 2026
  15 Mar. 2026 - 18 Mar. 2026
• Exploration of Optical Chirality Based on the Orbital Angular Momentum of Light Using a Single Chiral Metallic Nanostructure as a Probe
  Shun Hashiyada; An'an Wu; Yoshito Y. Tanaka
  The International Chemical Congress of Pacific Basin Societies 2025 (Pacifichem 2025), 15 Dec. 2025
  15 Dec. 2025 - 21 Dec. 2025
• 〔主要な業績〕光の角運動量とカイラリティ
  橋谷田俊
  カイラル若手の会, 24 Sep. 2025
  22 Sep. 2025 - 24 Sep. 2025, [Invited]
• Chiral optical response induced by optical orbital angular momentum: Experimental verification in a single chiral nanostructure
  Shun Hashiyada; An'an Wu; Yoshito Y. Tanaka
  80th Annual Meeting(2025), The Physical Society of Japan, 19 Sep. 2025
  16 Sep. 2025 - 19 Sep. 2025
• 〔Major achievements〕Exploration Of Optical Chirality Based On The Orbital Angular Momentum Of Light Using A Single Chiral Metallic Nanostructure As A Probe
  Shun Hashiyada; An’an Wu; Yoshito Tanaka
  The 15th International Conference on Metamaterials, Photonic Crystals and Plasmonics (META2025), 22 Jul. 2025, English, Invited oral presentation
  22 Jul. 2025 - 25 Jul. 2025, [Invited]
• Design and Evaluation of a Bull’s Eye Structure for Improving the Response Speed and Voltage of Carbon Nanotube Sensor in GHz Range
  Masakazu Konishi; Hiroki Okawa; Shun Hashiyada; Yuto Matsuzaki; Qi Zhang; Hajime Nishiyama; Kou Li; YoshitoY. Tanaka; Yukio Kawano
  CLEO®/Europe-EQEC 2025, 25 Jun. 2025
  23 Jun. 2025 - 27 Jun. 2025
• 〔主要な業績〕円偏光光渦に対するナノ物質のキラル光学応答
  橋谷田俊
  対称性の破れと電磁メタマテリアル, 01 May 2025, Japanese, Invited oral presentation
  [Invited]
• Conservation law for angular momentum of electromagnetic field derivatives: Analysis of optical spin and orbital loss
  Shun Hashiyada; Yoshito Y. Tanaka
  Optical Manipulation and Structured Materials Conference (OMC25), 23 Apr. 2025, English
  22 Apr. 2025 - 25 Apr. 2025
• 単一キラル金属ナノ構造をプローブとして用いた光の軌道角運動に基づく光学的キラリティの探究
  橋谷田俊; 田中嘉人
  2025年第72回応用物理学会春季学術講演会, 14 Mar. 2025, Oral presentation
• 軌道角運動量を持つ光渦に対するキラル金属ナノ構造の光学二色性
  橋谷田俊; Paula Lalaguna; Malcolm Kadodwala; 田中嘉人
  日本光学会Optics & Photonics Japan 2024, Nov. 2024, Japanese, Oral presentation
• Dissipations of spin and orbital angular momentum of light by materials
  Shun Hashiyada; Yoshito Y. Tanaka
  The Physical Society of Japan (JPS) 2024 Annual (79th) Meeting, 16 Sep. 2024, Japanese, Oral presentation
  16 Sep. 2024 - 19 Sep. 2024
• 〔Major achievements〕Rapid modulation of the directions of handedness of optical vortices for precise measurements of helical dichroism
  Shun Hashiyada; Yoshito Y. Tanaka
  14th International Conference on Metamaterials, Photonic Crystals and Plasmonics (META2024), 16 Jul. 2024, English, Invited oral presentation
  16 Jul. 2024 - 19 Jul. 2024, [Invited]
• 〔Major achievements〕Development of analytical method for angular momentum exchange in chiral light-matter interactions
  Shun Hashiyada
  Seminar in School of Chemistry, University of Glasgow, 03 Jun. 2024, English, Invited oral presentation
  [Invited]
• Rapid modulation of the directions of handedness of optical vortices for precise measurements of helical dichroism
  Shun Hashiyada; Yoshito Tanaka
  The 11th Optical Manipulation and Structured Materials Conference OMC 2024, 24 Apr. 2024, English, Oral presentation
  23 Apr. 2024 - 26 Apr. 2024
• Contributions of Spin and Orbital Angular Momentum of Light in Optical Torque
  Shun Hashiyada; Yoshito Y. Tanaka
  The 71st JSAP Spring Meeting 2024, 23 Mar. 2024, Japanese, Oral presentation
  22 Mar. 2024 - 25 Mar. 2024
• Fast Modulation of Optical Vortices for Precise Measurements of Vortex Dichroism
  °Shun Hashiyada; Yoshito Y. Tanaka
  Optics & Photonics Japan 2023, 29 Nov. 2023, Japanese, Oral presentation
  27 Nov. 2023 - 29 Nov. 2023
• Chiral electromagnetic field created by metal nanostructures
  Shun HASHIYADA
  The 8th RAP Symposium, 09 Mar. 2021, English, Oral presentation
• Chiral optical near-fields created by plasmonics nanostructures
  Shun Hashiyada; Tetsuya Narushima; Hiromi Okamoto
  Materials Research Meeting 2019, 13 Dec. 2019, English, Poster presentation
  [International presentation]
• Circularly polarized light scattering from spherical gold nanoparticles excited with linearly polarized light
  橋谷田俊; 田中拓男
  The 7th RAP Symposium, 09 Dec. 2019, Japanese, Poster presentation
• Circularly polarized light scattering from spherical gold nanoparticles excited with linearly polarized light
  Shun Hashiyada; Taiki Okada; Takuo Tanaka
  Optics & Photonics Japan 2019, 05 Dec. 2019, Japanese, Oral presentation
  [Domestic Conference]
• 〔Major achievements〕Chirality in Optical Fields Localized on Gold Nanostructures
  Shun Hashiyada; Tetsuya Narushima; Hiromi Okamoto
  The 39th Annual Meeting of the Laser Society of Japan, Jan. 2019, Japanese, Invited oral presentation
  [Invited], [Domestic Conference]
• Chirality of optical near fields created by metal nanostructures
  Shun Hashiyada
  JSPS Core-to-Core Program ”Young Scientist Seminar”, Dec. 2018, Japanese, Oral presentation
  [Domestic Conference]
• Spectral properties of chiral electromagnetic near fields created by chiral plasmonic nanostructures
  Shun Hashiyada; Kensaku Endo; Tetsuya Narushima; Yoshihiko Togawa; Hiromi Okamoto
  Optics & Photonics Japan 2018 “Annual Joint Symposia on Optics", Oct. 2018, English, Oral presentation
  [International presentation]
• Spectral Properties of Chiral Optical Fields Localized on Chiral Metal Nanostructures
  Shun Hashiyada; Kensaku Endo; Tetsuya Narushima; Yoshihiko Togawa; Hiromi Okamoto
  The 79th JSAP Autumn Meeting 2018, Sep. 2018, Japanese, Oral presentation
  [Domestic Conference]
• 〔Major achievements〕Mapping polarization states of plasmonic fields
  Shun Hashiyada; Tetsuya Narushima; Hiromi Okamoto
  The 26th International Conference on Raman Spectroscopy (ICORS 2018), Aug. 2018, English, Invited oral presentation
  [Invited], [International presentation]
• Visualization of chiral optical fields in chiral metal nanostructures
  Shun Hashiyada; Kensaku Endo; Tetsuya Narushima; Yoshihiko Togawa; Hiromi Okamoto
  The 12th International Conference on Excitonic and Photonic Processes in Condensed Matter and Nano Materials (EXCON 2018), Jul. 2018, English, Poster presentation
  [International presentation]
• 〔Major achievements〕Spectral properties of chiral optical fields localized on chiral metal nanostructures
  Shun Hashiyada; Kensaku Endo; Tetsuya Narushima; Yoshihiko Togawa; Hiromi Okamoto
  International Symposium on Chiral Magnetism (χ-mag 2018), Jul. 2018, English, Invited oral presentation
  [Invited], [International presentation]
• Active polarization control of optical fields localized on gold nano-rectangles
  Shun Hashiyada; Tetsuya Narushima; Hiromi Okamoto
  The 5th Optical Manipulation Conference (OMC’18), Apr. 2018, English, Poster presentation
  [International presentation]
• Visualization of chiral light confined in nano space
  Shun Hashiyada
  Cutting-Edge Researches in Coordination Chemistry and Photochemistry, Nov. 2017, English, Invited oral presentation
  [Invited], [International presentation]
• Polarization Control of Optical Near-Fields with Gold Nano-Rectangles
  Shun Hashiyada; Tetsuya Narushima; Hiromi Okamoto
  The 78th JSAP Autumn Meeting, 2017, Sep. 2017, Japanese, Oral presentation
  [Domestic Conference]
• Generation of chiral optical near-fields with non-chiral metallic nanostructures and linearly polarized light
  Shun Hashiyada; Tetsuya Narushima; Hiromi Okamoto
  The 4th Optical Manipulation Conference (OMC’17), Apr. 2017, English, Oral presentation
  [International presentation]
• 〔Major achievements〕Generation of chiral optical near-fields with non-chiral plasmonic nanostructures
  Shun Hashiyada; Tetsuya Narushima; Hiromi Okamoto
  Optics & Photonics Japan 2016 "OSJ-OSA Joint Symposia on Plasmonics and Digital Photonics", Oct. 2016, English, Oral presentation
  [International presentation]
• Polarization analysis of local optical activity with excitation of plasmon resonances in gold nano-rectangles
  Shun Hashiyada; Tetsuya Narushima; Hiromi Okamoto
  The 10th Annual Meeting of Japan Society for Molecular Science, Sep. 2016, Japanese, Oral presentation
  [Domestic Conference]
• 〔Major achievements〕Observation of polarization states of plasmonic fields in rectangular gold nanostructures using near-field polarimetry
  Shun Hashiyada; Tetsuya Narushima; Hiromi Okamoto
  The 14th International Conference of Near-Field Optics, Nanophotonics and Related Techniques (NFO-14), Sep. 2016, English, Poster presentation
  [International presentation]
• Local Optical Activity
  Shun Hashiyada; Tetsuya Narushima; Hiromi Okamoto
  Annual meeting of the Spectroscopical Society of Japan 2016, May 2016, Japanese, Oral presentation
  [Domestic Conference]
• Mapping of Polarization States of Plasmonic Fields in Rectangular Gold Nanostructures
  Shun Hashiyada; Tetsuya Narushima; Hiromi Okamoto
  第63回応用物理学会春季学術講演会, Mar. 2016, Japanese, Oral presentation
  [Domestic Conference]
• Ultrasensitive detection of chirality of viruses using chiral electromagnetic fields created by achiral metal nanostructures
  Shun Hashiyada; Affar Karimullah; Hiromi Okamoto; Malcolm Kadodwala
  The International Chemical Congress of Pacific Basin Societies 2015 (Pacifichem 2015), Dec. 2015, English, Poster presentation
  [International presentation]
• Ultrasensitive Detection of Chiral Supramolecules Based on Highly Twisted Optical Fields Created by Achiral Plasmonic Nanostructures
  Shun Hashiyada; Affar Karimullah; Hiromi Okamoto; Malcolm Kadodwala
  The 76th JSAP Autumn Meeting, 2015, Sep. 2015, Japanese, Oral presentation
  [Domestic Conference]
• 〔Major achievements〕Development of a New Method of Nano-Imaging of Optical Activity with Near-Field Illumination
  Shun Hashiyada; Tetsuya Narushima; Hiromi Okamoto
  Annual Meeting of Japan Society for Molecular Science (2015), Sep. 2015, Japanese, Poster presentation
  [Domestic Conference]
• Ultrasensitive detection of chirality of viruses using chiral electromagnetic fields created by achiral metal nanostructures
  Shun Hashiyada; Affar Karimullah; Hiromi Okamoto; Malcolm Kadodwala
  The 15th International Conference on Chiroptical Spectroscopy, Aug. 2015, English, Oral presentation
  [International presentation]
• Supersensitive detection of molecular chirality using achiral light and achiral gold nanostructures
  Shun Hashiyada; Affar Karimullah; Hiromi Okamoto; Malcolm Kadodwala
  The Annual Meeting of the Spectroscopical Society of Japan, Jun. 2015, Japanese, Poster presentation
  [Domestic Conference]
• 〔Major achievements〕Chirality Sensing of Biomolecules Using Achiral Gold Nanostructures and Achiral Light Source
  Shun Hashiyada; Ryan Tullius; Affar Karimullah; Hiromi Okamoto; Malcolm Kadodwala
  The 95th CSJ Annual Meeting, Mar. 2015, Japanese, Oral presentation
  [Domestic Conference]
• Chirality sensing of biomolecules using achiral gold nanostructures and achiral light source
  Shun Hashiyada; Ryan Tullius; Affar Karimullah; Hiromi Okamoto; Malcolm Kadodwala
  The Winter School of Sokendai / Asian CORE Program "Research and Its Challenges in Molecular Science: Fundamentals and State-of-the-Art", Jan. 2015, English, Poster presentation
  [International presentation]
• Local Optical Activity in Achiral Two-Dimensional Gold Nanostructures
  Shun Hashiyada; Tetsuya Narushima; Hiromi Okamoto
  Annual Meeting of Japan Society for Molecular Science (2014）, Sep. 2014, Japanese, Poster presentation
  [Domestic Conference]
• Local optical activity in achiral 2D gold nanostructures
  Shun Hashiyada; Tetsuya Narushima; Hiromi Okamoto
  The 13th international conference of Near-field Optics and Nanophotonics, Aug. 2014, English, Poster presentation
  [International presentation]
• Local optical activity of metallic nanostructures
  Shun Hashiyada; Tetsuya Narushima; Hiromi Okamoto
  Asian CORE Winter School on Frontiers of Molecular, Photo-, and Material Sciences, Feb. 2014, English, Oral presentation
  [International presentation]
• 〔主要な業績〕アキラルな２次元金ナノ構造体における局所光学活性
  橋谷田俊; 成島哲也; 岡本裕巳
  日本光学会年次学術講演会 Optics & Photonics Japan 2013, Nov. 2013, Japanese, Oral presentation
  [Domestic Conference]
• Nanoscale strong optical activity of metallic nanostructures
  Shun Hashiyada; Tetsuya Narushima; Hiromi Okamoto
  A Peter Wall Colloquium Abroad and The 73rd Okazaki Conference on “Coherent and Incoherent Wave packet Dynamics, Oct. 2013, English, Poster presentation
  [International presentation]
• Second harmonic generation from 1D gold nanoparticles aligned on glass
  Shun Hashiyada; Satoru Ookawara; Masafumi Kudo; Toru Shimada; Atsushi Kubo; Masahiro Kitajima; Masatoshi Tanaka; Takanori Suzuki
  日本物理学会第66回年次大会, Mar. 2011, Japanese, Poster presentation
  [Domestic Conference]

• 一般教育演習(ﾌﾚｯｼｭﾏﾝｾﾐﾅｰ), 2024年, 学士課程, 全学教育

• Apr. 2024 - Present
  The Optical Society of Japan
• Jun. 2019 - Present
  日本物理学会
• Jan. 2015 - Present
  THE JAPAN SOCIETY OF APPLIED PHYSICS
• JAPAN SOCIETY FOR MOLECULAR SCIENCE

• Development of Chiral Optical Spectroscopy Incorporating Orbital Optical Chirality beyond Spin Optical Chirality
  Grants-in-Aid for Scientific Research
  Apr. 2026 - Mar. 2029
  Shun Hashiyada
  Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (B), Hokkaido University, Principal investigator, 26K01453
• Establishing Optical Spin and Orbital Angular Momentum Control Techniques for Chiral Light Dichroism Spectroscopy
  Precursory Research for Embryonic Science and Technology (PRESTO)
  Oct. 2025 - Mar. 2029
  Shun Hashiyada
  Japan Science and Technology Agency (JST), Establishing the Solid Foundation for Innovative Measurement and Analysis Process, Hokkaido University, Principal investigator, JPMJPR25J6
• キラル Si 微細構造における励起モードとキラル光二色性の相関解明
  若手フィージビリティスタディ共同研究
  Apr. 2025 - Mar. 2027
  橋谷田 俊; 新家 寛正; 押切 友也
  物質・デバイス領域共同研究拠点, Principal investigator, 2025Y002
• Creation of longitudinal chiral electromagnetic fields and detection of chiral materials
  Grants-in-Aid for Scientific Research
  Apr. 2023 - Mar. 2026
  Shun Hashiyada
  Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (C), Hokkaido University, Principal investigator, 23K04669
• 禁制光検出による迅速なキラル近接場光スペクトル測定法の開発
  科研費（若手研究）
  Apr. 2021 - Mar. 2024
  橋谷田 俊
  日本学術振興会, Principal investigator
• キラル磁気プラズモニクスの開拓
  先端光科学研究プロジェクト
  Aug. 2021 - Mar. 2022
  橋谷田 俊; 戸川 欣彦
  自然科学研究機構新分野創成センター, Principal investigator
• Chiroptical Spectroscopy of Molecules Captured by Plasmonic Optical Tweezers
  Grant-in-Aid for Early-Career Scientists
  Apr. 2019 - Mar. 2022
  Shun Hashiyada
  Japan Society for the Promotion of Science, Principal investigator, Competitive research funding
• Ultrasensitive detection of chiral molecules using highly symmetric metal nanostructures and linearly polarized light
  Grant-in-Aid for Research Activity start-up
  Aug. 2017 - Mar. 2019
  Shun Hashiyada
  Japan Society for the Promotion of Science, Principal investigator, Competitive research funding
• Development of Chiral Chemical Fields with Chiral Plasmons
  Grants-in-Aid for Scientific Research
  Apr. 2015 - Mar. 2019
  Okamoto Hiromi; NARUSHIMA Tetsuya; NISHIYAMA Yoshio; HASHIYADA Shun; LE Khai Quang; KADODWALA Malcolm; JACK Calum
  When a matter is not superposable on its mirror image, as in the case of right and left hands, the geometry of the matter is referred to as "chiral". Chirality is an important characteristic of molecules and nanomaterials. In this research, we developed and/or advanced the methods combining microscopy with optical activity spectroscopy, which characterizes molecular- and nano-level chirality, and we utilized them to investigate fundamental properties of local chirality of nanomaterials, and to apply the knowledge to develop novel chiral photo-chemical functions of materials. We have shown that local chirality properties of nanomaterials show fundamentally different behaviors as compared with those observed with conventional macroscopic optical activity spectroscopy. By the properly designed usage of noble metal nanostructures and polarized optical fields, we found that molecular- and/or nano-scale chirality can be induced on achiral materials systems.
  Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (A), Institute for Molecular Science, 15H02161
• Control of magnetization with local circularly polarized field induced on metallic nanostructures
  Grants-in-Aid for Scientific Research
  Apr. 2015 - Mar. 2017
  OKAMOTO Hiromi; NARUSHIMA Tetsuya; NISHIYAMA Yoshio; HASHIYADA Shun
  We investigated whether inverse Faraday effect, which is potentially utilized as a basis for optical control of magnetic properties of materials, can be enhanced with metal nanostructures. When a material is irradiated with circularly polarized light, which possesses twisted (spiral) field structure, the material is slightly magnetized (this phenomenon is called as inverse Faraday effect). However, this effect is usually very small. Because strongly twisted circular polarized field is sometimes induced when a metallic nanostructure is shined with light, we considered that inverse Faraday effect may be enhanced by the strongly twisted field with metallic nanostructures, and explored the possible utility for control of magnetic properties with light. Up to now, we have succeeded in observing circularly-polarized-light induced magnetization. We will continue the efforts toward characterizing properties of enhanced inverse Faraday effects by changing the sample materials and conditions.
  Japan Society for the Promotion of Science, Grant-in-Aid for Challenging Exploratory Research, Institute for Molecular Science, 15K13683
• Development for Chiral Photochemical Reaction Fields Using Strong Local Optical Activity of Gold Nanostructures
  Grant-in-Aid for Scientific Research
  Apr. 2015 - Mar. 2017
  Shun Hashiyada
  JSPS, Principal investigator, Competitive research funding
• Spatio-temporal characteristics and control of coupled excited states in nano-dot arrays
  Grants-in-Aid for Scientific Research
  Apr. 2010 - Mar. 2015
  OKAMOTO Hiromi; NARUSHIMA Tetsuya; IMURA Kohei; NISHIYAMA Yoshio; JIANG Yuqiang; LIM Jong Kuk; KOWAKA Yasuyuki; WU Hui Jun; HASHIYADA Shun
  This research aimed principally at revealing space-time structures of optical fields in metal nanostructures and plasmonic interactions that determine the field structures, through near-field optical imaging and analysis. We found characteristic optical field structures in 1- and 2-dimensional array structures of metal nanoparticles, and the results were intepreted in terms of a simple model of inter-particle interaction. We also obtained some intriguing results on ultrafast dynamics and other basic nano-optical characteristics of metal nanostructures. We further extend the research to studies on optical activity in nanospace. A novel near-field circular dichroism microscope was constructed, and local optical activity of metal nanostructures was visualized. We found that metal nanoparticles yield locally very strong optical activity, and that even highly symmetric achiral nanostructures gave local optical activity.
  Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (S), Institute for Molecular Science, 22225002

• 円偏光光渦照射器、分析装置および顕微鏡
  Patent right, 田中嘉人; 橋谷田俊, 北海道大学
  特願2024-199269, 14 Nov. 2024

• The 1st International Symposium on Molecular Materials for Future
  01 Feb. 2025 - 02 Feb. 2025
  Planning etc
  Academic society etc
  Ryojun Toyoda, Kanako Bessho-Uehara, Naoya Fukui, Shun Hashiyada Shinya Takaishi, Anirban Mondal, Romain Morodo

• 差の湯の会
  14 Sep. 2013 - 07 Nov. 2015
  Appearance, Informant
  Others