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Last Updated :2024/10/11

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Master

Affiliation (Master)

  • Research Institute for Electronic Science　Biology and Life Sciences

Affiliation (Master)

  • Research Institute for Electronic Science　Biology and Life Sciences

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Profile and Settings

Affiliation

  • Hokkaido University, Research Institute for Electronic Science

Profile and Settings

  • Name (Japanese)

    Shibukawa

  • Name (Kana)

    Atsushi

  • Name

    201801012287962238

Affiliation

  • Hokkaido University, Research Institute for Electronic Science

Achievement

Research Interests

  • Holography, Wavefront shaping, Optogenetics, Rhodopsin   

Research Areas

  • Manufacturing technology (mechanical, electrical/electronic, chemical engineering) / Electronic devices and equipment

Awards

  • 2021/02 公益財団法人コニカミノルタ科学技術振興財団 令和２年度コニカミノルタ画像科学奨励賞
     世界最速一次元空間光変調器の開発と光波面シェイピングへの応用 
    受賞者: 渋川 敦史

Published Papers

  • Atsushi Shibukawa, Ryota Higuchi, Gookho Song, Hideharu Mikami, Yuki Sudo, Mooseok Jang
    Nature Communications 15 (1) 2024/04/08 [Refereed]
     
    Abstract The capability of focus control has been central to optical technologies that require both high temporal and spatial resolutions. However, existing varifocal lens schemes are commonly limited to the response time on the microsecond timescale and share the fundamental trade-off between the response time and the tuning power. Here, we propose an ultrafast holographic focusing method enabled by translating the speed of a fast 1D beam scanner into the speed of the complex wavefront modulation of a relatively slow 2D spatial light modulator. Using a pair of a digital micromirror device and a resonant scanner, we demonstrate an unprecedented refresh rate of focus control of 31 MHz, which is more than 1,000 times faster than the switching rate of a digital micromirror device. We also show that multiple micrometer-sized focal spots can be independently addressed in a range of over 1 MHz within a large volume of 5 mm × 5 mm × 5.5 mm, validating the superior spatiotemporal characteristics of the proposed technique – high temporal and spatial precision, high tuning power, and random accessibility in a three-dimensional space. The demonstrated scheme offers a new route towards three-dimensional light manipulation in the 100 MHz regime.
  • Shiho Kawanishi, Keiichi Kojima, Atsushi Shibukawa, Masayuki Sakamoto, Yuki Sudo
    ACS Omega 8 4826 - 4834 2470-1343 2023/01/25 [Refereed]
  • Masuzu Kikuchi, Keiichi Kojima, Shin Nakao, Susumu Yoshizawa, Shiho Kawanishi, Atsushi Shibukawa, Takashi Kikukawa, Yuki Sudo
    Scientific reports 11 (1) 14765 - 14765 2021/07/20 [Refereed]
     
    Microbial rhodopsins are photoswitchable seven-transmembrane proteins that are widely distributed in three domains of life, archaea, bacteria and eukarya. Rhodopsins allow the transport of protons outwardly across the membrane and are indispensable for light-energy conversion in microorganisms. Archaeal and bacterial proton pump rhodopsins have been characterized using an Escherichia coli expression system because that enables the rapid production of large amounts of recombinant proteins, whereas no success has been reported for eukaryotic rhodopsins. Here, we report a phylogenetically distinct eukaryotic rhodopsin from the dinoflagellate Oxyrrhis marina (O. marina rhodopsin-2, OmR2) that can be expressed in E. coli cells. E. coli cells harboring the OmR2 gene showed an outward proton-pumping activity, indicating its functional expression. Spectroscopic characterization of the purified OmR2 protein revealed several features as follows: (1) an absorption maximum at 533 nm with all-trans retinal chromophore, (2) the possession of the deprotonated counterion (pKa = 3.0) of the protonated Schiff base and (3) a rapid photocycle through several distinct photointermediates. Those features are similar to those of known eukaryotic proton pump rhodopsins. Our successful characterization of OmR2 expressed in E. coli cells could build a basis for understanding and utilizing eukaryotic rhodopsins.
  • Keiichi Kojima, Natsuki Miyoshi, Atsushi Shibukawa, Srikanta Chowdhury, Masaki Tsujimura, Tomoyasu Noji, Hiroshi Ishikita, Akihiro Yamanaka, Yuki Sudo
    The Journal of Physical Chemistry Letters 11 (15) 6214 - 6218 1948-7185 2020/07/22 [Refereed]
     
    Anion channelrhodopsin-2 (GtACR2) was identified from the alga Guillardia theta as a light-gated anion channel, providing a powerful neural silencing tool for optogenetics. To expand its molecular properties, we produced here GtACR2 variants by strategic mutations on the four residues around the retinal chromophore (i.e., R129, G152, P204, and C233). After the screening with the Escherichia coli expression system, we estimated spectral sensitivities and the anion channeling function by using the HEK293 expression system. Among the mutants, triple (R129M/G152S/C233A) and quadruple (R129M/G152S/P204T/C233A) mutants showed the significantly red-shifted absorption maxima (λmax = 498 and 514 nm, respectively) and the long-lived channel-conducting states (the half-life times were 3.4 and 5.4 s, respectively). In addition, both mutants can be activated and inactivated by different wavelengths, representing their step-functional ability. We nicknamed the quadruple mutant "GLaS-ACR2" from its green-sensitive, long-lived, step-functional properties. The unique characteristics of GLaS-ACR2 suggest its high potential as a neural silencing tool.
  • The Unlimited Potential of Microbial Rhodopsins as Optical Tools
    K. Kojima, A. Shibukawa, Y. Sudo
    Biochemistry 59 (3) 218 - 229 2019/12 [Refereed][Invited]
  • Quantitation of the neural silencing activity of anion channelrhodopsins in Caenorhabditis elegans and their applicability for long-term illumination
    T. Yamanashi, M. Maki, K. Kojima, A. Shibukawa, T. Tsukamoto, S. Chowdhury, A. Yamanaka, S. Takagi, Y. Sudo
    Scientific Reports 9 (7863) 2019/05 [Refereed][Not invited]
  • Photochemical Characterization of a New Heliorhodopsin from the Gram-Negative Eubacterium Bellilinea caldifistulae (BcHeR) and Comparison with Heliorhodopsin-48C12
    A. Shibukawa, K. Kojima, Y. Nakajima, Y. Nishimura, S. Yoshizawa, Y. Sudo
    Biochemistry 58 (26) 2934 - 2943 2019/05 [Refereed][Not invited]
  • Virtual phase conjugation based optical tomography for single-shot three-dimensional imaging
    Yuta Goto, Atsushi Okamoto, Atsushi Shibukawa, Kazuhisa Ogawa, Akihisa Tomita
    Optics Express 26 3779 - 3790 2018/02 [Refereed][Not invited]
  • Mooseok Jang†, Yu Horie†, Atsushi Shibukawa†, Joshua Brake, Yan Liu, Seyedeh Mahsa Kamali, Amir Arbabi, HaowenRuan, Andrei Faraon, Changhuei Yang
    Nature Photonics 12 84 - 90 2018/02 [Refereed][Not invited]
  • Edward Haojiang Zhou, Atsushi Shibukawa, Joshua Brake, Haowen Ruan, Changhuei Yang
    OPTICA 3 (10) 1107 - 1113 2334-2536 2016/10 [Refereed][Not invited]
     
    Imaging of a weak target hidden behind a scattering medium can be significantly confounded by glare. We report a method, termed coherence gated negation (CGN), that uses destructive optical interference to suppress glare and allow improved imaging of a weak target. As a demonstration, we show that by permuting through a set range of amplitude and phase values for a reference beam interfering with the optical field from the glare and target reflection, we can suppress glare by an order of magnitude, even when the optical wavefront is highly disordered. This strategy significantly departs from conventional coherence gating methods in that CGN actively "gates out" the unwanted optical contributions while conventional methods "gate in" the target optical signal. We further show that the CGN method can outperform conventional coherence gating image quality in certain scenarios by more effectively rejecting unwanted optical contributions. (C) 2016 Optical Society of America
  • Nicolino Stasio†, Atsushi Shibukawa†, Ioannis N, Papadopoulos, Salma Farahi, Olivier Simandoux, Jean-Pierre Huignard, Emmanuel Bossy, Christophe Moser, Demetri Psaltis
    BIOMEDICAL OPTICS EXPRESS 6 (12) 4619 - 4631 2156-7085 2015/12 [Refereed][Not invited]
     
    In this paper we demonstrate the enhancement of the sensing capabilities of glass capillaries. We exploit their properties as optical and acoustic waveguides to transform them potentially into high resolution minimally invasive endoscopic devices. We show two possible applications of silica capillary waveguides demonstrating fluorescence and optical-resolution photoacoustic imaging using a single 330 mu m-thick silica capillary. A nanosecond pulsed laser is focused and scanned in front of a capillary by digital phase conjugation through the silica annular ring of the capillary, used as an optical waveguide. We demonstrate optical-resolution photoacoustic images of a 30 mu m-thick nylon thread using the water-filled core of the same capillary as an acoustic waveguide, resulting in a fully passive endoscopic device. Moreover, fluorescence images of 1.5 mu m beads are obtained collecting the fluorescence signal through the optical waveguide. This kind of silica-capillary waveguide together with wavefront shaping techniques such as digital phase conjugation, paves the way to minimally invasive multi-modal endoscopy. (C) 2015 Optical Society of America
  • Jin Nozawa, Atsushi Okamoto, Atsushi Shibukawa, Masanori Takabayashi, Akihisa Tomita
    APPLIED OPTICS 54 (29) 8644 - 8652 1559-128X 2015/10 [Refereed][Not invited]
     
    We propose a two-channel holographic diversity interferometer (2ch-HDI) system for single-shot and highly accurate measurements of complex amplitude fields with a simple optical setup. In this method, two phase-shifted interference patterns are generated, without requiring a phase-shifting device, by entering a circularly polarized reference beam into a polarizing beam splitter, and the resulting patterns are captured simultaneously using two image sensors. However, differences in the intensity distributions of the two image sensors may lead to serious measurement errors. Thus, we also develop a two-channel algorithm optimized for the 2ch-HDI to compensate for these differences. Simulation results show that this algorithm can compensate for such differences in the intensity distributions in the two image sensors. Experimental results confirm that the combination of the 2ch-HDI and the calculation algorithm significantly enhances measurement accuracy. (c) 2015 Optical Society of America
  • Kaori Nishimaki, Atsushi Okamoto, Atsushi Shibukawa, Akihisa Tomita, Yoshihisa Takayama, Masatoshi Bunsen
    JAPANESE JOURNAL OF APPLIED PHYSICS 53 (8) 08MB13  0021-4922 2014/07 [Refereed][Not invited]
     
    In optical intersatellite communication, the background light consisting mainly of sunlight decrease transmission rate with increasing bit error. A spatial filtering system using a double-phase-conjugate mirror (DPCM) and a phase plate is proposed to block the background light, which cannot be filtered out by using wavelength filters, polarization filters, or dousers. In this system, the effect of wavefront distortion caused by the phase plate and the compensation effect of the distortion by phase conjugate light from the DPCM are effectively combined for spatially separating signal light and background light. We demonstrated the reduction of the background light by the proposed system and optimized the phase plate for maximizing this reduction effect. As a result, it was clarified that the transmission rate can be drastically improved up to 11-fold. (C) 2014 The Japan Society of Applied Physics
  • Kaori Nishimaki, Atsushi Okamoto, Atsushi Shibukawa, Masanori Takabayashi, Akihisa Tomita, Yoshihisa Takayama
    OPTICAL REVIEW 21 (3) 415 - 424 1340-6000 2014/05 [Refereed][Not invited]
     
    A double phase conjugate mirror (DPCM), created by two mutually incoherent beams entering photorefractive nonlinear materials, can generate a phase conjugate beam whose reflectivity may be greater than 100%. Even though the conditions of the incident beams are changed, the DPCM can be dynamically reconfigured by using a Sn2P2S6 crystal with a high response speed. These features of the DPCM are advantageous, particularly in an optical inter-satellite communication system. In particular, use of the phase conjugate beam from the DPCM offers wavefront compensation and amplification in satellite communication. In addition, the dynamically reconfigurable DPCM using a Sn2P2S6 crystal relaxes the acquisition accuracy of the signal beam in the system. In this study, the temporal and spatial operating characteristics of the DPCM using a Sn2P2S6 crystal were first clarified. Next, an inter-satellite system based on the DPCM was proposed, and it was demonstrated that our system significantly improves the tolerance of the acquisition accuracy and tracking time. (C) 2014 The Japan Society of Applied Physics
  • Atsushi Shibukawa, Atsushi Okamoto, Yuta Goto, Satoshi Honma, Akihisa Tomita
    OPTICS EXPRESS 22 (10) 11918 - 11929 1094-4087 2014/05 [Refereed][Not invited]
     
    In a conventional digital phase conjugation system, only the phase of an input light is time-reversed. This deteriorates phase conjugation fidelity and restricts application fields to specific cases only when the input light has uniformly-distributed scattered wavefront. To overcome these difficulties, we present a digital phase conjugate mirror based on parallel alignment of two phase-only spatial light modulators (SLMs), in which both amplitude and phase of the input light can be time-reversed. Experimental result showed that, in the phase conjugation through a holographic diffuser with diffusion angle of 0.5 degree, background noises decrease to 65% by our digital phase conjugation mirror. (C)2014 Optical Society of America
  • Study on ultra-high density holographic memory using optical complex-amplitude control technique
    Atsushi Shibukawa
    Hokkaido University 2014/03 [Refereed][Invited]
  • Atsushi Shibukawa, Atsushi Okamoto, Masanori Takabayashi, Akihisa Tomita
    OPTICS EXPRESS 22 (4) 3968 - 3982 1094-4087 2014/02 [Refereed][Not invited]
     
    We propose a spatial cross modulation method using a random diffuser and a phase-only spatial light modulator (SLM), by which arbitrary complex-amplitude fields can be generated with higher spatial resolution and diffraction efficiency than off-axis and double-phase computer-generated holograms. Our method encodes the original complex object as a phase-only diffusion image by scattering the complex object using a random diffuser. In addition, all incoming light to the SLM is consumed for a single diffraction order, making a diffraction efficiency of more than 90% possible. This method can be applied for holographic data storage, three-dimensional displays, and other such applications. (C) 2014 Optical Society of America
  • Reconfigurable spatial mode conversion using a phase-type spatial light modulator
    Tomohiro Maeda, Atsushi Okamoto, Yuki Hirasaki, Atsushi Shibukawa, Akihisa Tomita
    2014 OptoElectronics and Communication Conference, OECC 2014 and Australian Conference on Optical Fibre Technology, ACOFT 2014 517 - 518 2014 
    We propose the reconfigurable spatial mode conversion method using a phase-type spatial light modulator, and implement the experiment for interconversion among LP01, LP11, and higher-order spatial modes. © 2014 Engineers Australia.
  • Keisuke Zukeran, Atsushi Okamoto, Masanori Takabayashi, Atsushi Shibukawa, Kunihiro Sato, Akihisa Tomita
    JAPANESE JOURNAL OF APPLIED PHYSICS 52 (9) 09LD13  0021-4922 2013/09 [Refereed][Not invited]
     
    We proposed a double-referential holography (DRH) that allows phase-detection without external additional beams. In the DRH, phantom beams, prepared in the same optical path as signal beams and preliminary multiplexed in a recording medium along with the signal, are used to produce interference fringes on an imager for converting a phase into an intensity distribution. The DRH enables stable and high-accuracy phase detection independent of the fluctuations and vibrations of the optical system owing to medium shift and temperature variation. Besides, the collinear arrangement of the signal and phantom beams leads to the compactness of the optical data storage system. We conducted an experiment using binary phase modulation signals for verifying the DRH operation. In addition, 38-level spatial quadrature amplitude modulation signals were successfully reproduced with the DRH by numerical simulation. Furthermore, we verified that the distributed phase-shifting method moderates the dynamic range consumption for the exposure of phantom beams. (c) 2013 The Japan Society of Applied Physics
  • Atsushi Shibukawa, Atsushi Okamoto, Yuta Wakayama, Akihisa Tomita, Hisatoshi Funakoshi, Kunihiro Sato
    JAPANESE JOURNAL OF APPLIED PHYSICS 52 (9) 09LD03  0021-4922 2013/09 [Refereed][Not invited]
     
    To suppress interpage crosstalk that strongly restricts holographic data storage capacity, a digital image diffusion technique was proposed. In this technique, signal and crosstalk components are separated from the propagation angle difference produced by using a random diffuser and the nature of phase conjugate lights. The most attractive feature of the technique is that crosstalk suppression can be conducted while mostly keeping the conventional holographic data storage system unchanged by integrating optical processing and digital processing effectively. The connection between the two types of processing is realized by using two spatial light modulators for complex amplitude generation and phase detection methods for complex amplitude measurement. The simulation results showed that the proposed technique could increase the recording density 5.5-fold and reduce the shift pitch by a factor of 5 in comparison with conventional multiplexing methods when the diffusion angle of the diffuser is 10 degrees. (c) 2013 The Japan Society of Applied Physics
  • Multilayer Collinear Holographic Memory for Ultra-High Density Recording
    Atsushi Okamoto, Atsushi Shibukawa
    光学 40 (11) 591 - 593 2011/11 [Not refereed][Invited]
  • Atsushi Shibukawa, Atsushi Okamoto, Akihisa Tomita, Masanori Takabayashi, Kunihiro Sato
    JAPANESE JOURNAL OF APPLIED PHYSICS 50 (9) 09ME10  0021-4922 2011/09 [Refereed][Not invited]
     
    We proposed a new multilayer collinear holographic memory (MCHM) with a movable random phase mask that can act as an interlayer crosstalk reducer. First, to clarify the feasibility of our proposed device, we showed that it has an extremely sharp shift selectivity along the thickness direction of medium of nearly 5.0 mu m when the numerical aperture of the objective lens is 0.60. Next, we demonstrated that the utilization of the movable random phase mask can suppress interlayer crosstalk sufficiently, resulting in the improvement in the quality of reconstructed signals. Moreover, we revealed that the MCHM, in which the parallel use of a multilayered technique and collinear shift multiplexing is performed, brings out the medium potential sufficiently in terms of signal to noise ratio and medium dynamic range consumption. Finally, we verified that the MCHM can achieve a nearly 2 times larger data density at least compared with a conventional collinear holographic memory. (C) 2011 The Japan Society of Applied Physics
  • Atsushi Shibukawa, Atsushi Okamoto, Akihisa Tomita, Masanori Takabayashi, Kunihiro Sato, Masatoshi Bunsen
    Optics InfoBase Conference Papers 2162-2701 2011
  • Hisatoshi Funakoshi, Atsushi Okamoto, Masanori Takabayashi, Yuta Wakayama, Atsushi Shibukawa
    Optics InfoBase Conference Papers 2162-2701 2011 
    Our new analysis tool can be capable of calculations more than 30 times faster than the previous method and enables to estimate practical memory densities including not only recording and reconstruction process but also error correction process. © 2011 OSA.
  • Double-referential collinear holographic memory and spatial quadrature amplitude modulation
    Atsushi Okamoto, Keisuke Zukeran, Atsushi Shibukawa, Masanori Takabayashi
    Optics InfoBase Conference Papers 2162-2701 2011 
    A double-referential method, in which the reference light necessary for phase detection can be generated as diffraction light of the optical hologram automatically, is newly proposed. 16-SQAM signals can be reconstructed through dual-stage holography. © 2011 Optical Society of America.

MISC

Presentations

  • Wavefront shaping at 10 MHz refresh rate by exploiting the scan speed of a resonant scanner  [Invited]
    Atsushi Shibukawa, Yuki Sudo, Hideharu Mikami, Mooseok Jang
    The Pacific Rim Conference on Lasers and Electro-Optics (CLEO-PR) 2024  2024/08
  • Random-access focus scanning at 10MHz refresh rate by a scattering-assisted lens based on an ultrafast 1D spatial light modulation  [Invited]
    Atsushi Shibukawa, Yuki Sudo, Hideharu Mikami, Mooseok Jang
    Optics & Photonics Japan  2023/11
  • Development of ultra-large field-of-view focusing lens by complex wavefront compensation towards mouse brain cortex-wide imaging  [Not invited]
    Atsushi Shibukawa, Hyojeong Shon, Hideharu Mikami
    Optics & Photonics Japan  2023/11
  • LED光源を用いたアーキロドプシン3（AR3）による長時間膜電位計測法の確立  [Not invited]
    川西 志歩, 小島 慧一, 渋川 敦史, 坂本 雅行, 須藤 雄気
    第43回生体膜と薬物の相互作用シンポジウム  2022/10
  • LED光源を用いた微生物型ロドプシンAR3による膜電位の長時間イメージング  [Not invited]
    川西 志歩, 小島 慧一, 渋川 敦史, 坂本 雅行, 須藤 雄気
    第60回日本生物物理学会年会  2022/09
  • Megahertz Wavefront Control through Scattering Media  [Not invited]
    Atsushi Shibukawa, Hideharu Mikami, Mooseok Jang, Yuki Sudo
    The 22nd RIES-Hokudai International Symposium  2021/12
  • コンプレックス波面整形による光散乱との共生  [Invited]
    渋川敦史
    コニカミノルタカレッジ「先端光学」  2021/12
  • Ultrafast wavefront control involving scattering media  [Invited]
    Atsushi Shibukawa, Jang Mooseok, Hideharu Mikami, Yuki Sudo
    International Symposium on Imaging, Sensing, and Optical Memory 2021  2021/10
  • LED光源を用いたアーキロドプシン3由来の膜電位感受性蛍光の観察  [Not invited]
    川西志歩, 小島慧一, 渋川敦史, 坂本雅行, 須藤雄気
    第12回日本生物物理学会 中国四国支部大会  2021/05

Industrial Property Rights

  • WOP2021-056-WO01:光変調装置及び集光装置  
    渋川 敦史, ムサク ジャング  渋川 敦史(北海道大学), ムサク ジャング(韓国科学技術院)
  • 特願2021-153788:光変調装置及び集光装置  2021年/09/22
    渋川 敦史, 須藤 雄気, ムサク ジャング  渋川 敦史(北海道大学), 須藤 雄気(岡山大学), ムサク ジャング(韓国科学技術院)
  • 特開WO/2018/195309:HIGHLY SCATTERING METASURFACE PHASE MASKS FOR COMPLEX WAVEFRONT ENGINEERING  2018/10/25
    JANG, Mooseok, US HORIE, Yu, US SHIBUKAWA, Atsushi, US FARAON, Andrei, US YANG, Changhuei, US
  • 特許第6230047号:複素振幅画像表示方法、散乱位相画像生成装置および散乱位相画像生成方法    2017/10/27
    岡本淳, 渋川敦史, 後藤優太
  • 特許第6029167号:ノイズ除去方法およびノイズ除去装置、記録再生方法および記録再生装置、ならびに、画像計測方法および画像計測装置    2016/10/28
    岡本 淳, 渋川 敦史, 若山 雄太
  • 特開WO2015068834:複素振幅像生成装置および複素振幅像生成方法  2015/05/14
    岡本 淳, 渋川敦史
  • 特開WO/2013/008453:HOLOGRAPHIC MEMORY RECORDING METHOD AND REPRODUCTION METHOD, AND HOLOGRAPHIC MEMORY RECORDING DEVICE AND REPRODUCTION DEVICE  2013/01/17
    OKAMOTO, Atsushi, ZUKERAN, Keisuke, null TAKABAYASHI, Masanori, SHIBUKAWA, Atsushi

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