Dr. Moritsugu Sakamoto Profile

Dr. Moritsugu Sakamoto

Assistant Professor at Nagaoka Univ of Technology

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Author

Publications (14)

Proceedings Article | 30 September 2024 Presentation + Paper

Development of liquid crystal geometric phase elements for mid- and far-infrared wavelengths

Moritsugu Sakamoto, Yohei Mitsuboshi, Sora Ohara, Kuon Kawamura, Masato Suzuki, Kohei Noda, Tomoyuki Sasaki, Nobuhiro Kawatsuki, Hiroshi Ono

Proceedings Volume 13121, 1312109 (2024) https://doi.org/10.1117/12.3026040

KEYWORDS: Mid infrared, Diffraction gratings, Liquid crystals, Far infrared, Polarization

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Proceedings Article | 30 September 2024 Presentation + Paper

Hyperspectral S3 imager using liquid crystal polarized grating and its demonstration of material classification with deep learning

Masato Suzuki, Kimitaka Doi, Moritsugu Sakamoto, Kohei Noda, Tomoyuki Sasaki, Nobuhiro Kawatsuki, Hiroshi Ono

Proceedings Volume 13121, 1312108 (2024) https://doi.org/10.1117/12.3027403

KEYWORDS: Hyperspectral imaging, Imaging systems, Plastics, Liquid crystals, Polarization, Diffraction, Image classification, Deep learning, Near infrared, Scattered light

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Proceedings Article | 30 September 2024 Presentation + Paper

In situ control of the photoinduced birefringence of photoalignable liquid crystalline polymeric films

Nobuhiro Kawatsuki, Ryota Oya, Mizuho Kondo, Moritsugu Sakamoto, Hiroshi Ono

Proceedings Volume 13121, 1312104 (2024) https://doi.org/10.1117/12.3026918

KEYWORDS: Annealing, Birefringence, Absorbance, Liquid crystals, Polarization gratings, Polymers, Diffraction, Absorption spectrum, Liquids, Crystals

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Proceedings Article | 27 October 2021 Paper

Spectroscopic polarization measurement and control using channeled spectrum

Kazuhiko Oka, Keisaku Yamane, Moritsugu Sakamoto, Ryuji Morita

Proceedings Volume 11927, 119270N (2021) https://doi.org/10.1117/12.2616272

KEYWORDS: Polarization, Wave plates, Spectroscopy, Polarimetry, Modulation, Ultrafast phenomena, Polarization control, Spectroscopes, Ultrafast laser spectroscopy, Head

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Proceedings Article | 2 September 2021 Presentation + Paper

Polarized beam steering by use of multiply-cascaded rotating polarization gratings with biaxial anisotropy

Moritsugu Sakamoto, Huynh Thanh Nhan, Ryusei Momosaki, Kohei Noda, Tomoyuki Sasaki, Tadayoshi Kamei, Takeya Sakai, Yukitoshi Hattori, Nobuhiro Kawatsuki, Hiroshi Ono

Proceedings Volume 11807, 1180704 (2021) https://doi.org/10.1117/12.2593679

KEYWORDS: Beam steering, Polarization, Anisotropy, LIDAR, Diffraction gratings, Computer simulations, Liquid crystals

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Proceedings Article | 20 August 2020 Presentation + Paper

Vector beam demultiplexing via a crossed-fork shaped polarization grating fabricated by using photocrosslinkable liquid crystal polymer film

Moritsugu Sakamoto, Yusuke Kaneko, Yusuke Higa, Kohei Noda, Tomoyuki Sasaki, Masayuki Tanaka, Nobuhiro Kawatsuki, Hiroshi Ono

Proceedings Volume 11472, 114720Q (2020) https://doi.org/10.1117/12.2568902

KEYWORDS: Polarization, Liquid crystals, Holograms, Demultiplexers, Diffraction gratings, Singular optics

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Proceedings Article | 25 August 2017 Paper

Functionalized liquid crystal polymers generate optical and polarization vortex beams

Moritsugu Sakamoto, Yuki Nakamoto, Tran Minh Tien, Kotaro Kawai, Kohei Noda, Tomoyuki Sasaki, Nobuhiro Kawatsuki, Hiroshi Ono

Proceedings Volume 10361, 1036108 (2017) https://doi.org/10.1117/12.2273100

KEYWORDS: Photovoltaics, Spiral phase plates, Modulation, Phase shift keying, Crystal optics

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Proceedings Article | 16 March 2017 Presentation + Paper

Optical vortex generation by use of vector beam recorded azo-dye-doped liquid-crystal polymer composites

Moritsugu Sakamoto, Tomoyuki Sasaki, Tran Minh Tien, Kohei Noda, Nobuhiro Kawatsuki, Hiroshi Ono

Proceedings Volume 10120, 1012006 (2017) https://doi.org/10.1117/12.2249033

KEYWORDS: Optical vortices, Wavefronts, Liquid crystals, Polarization, Spatial light modulators, Laser beam diagnostics, Diffraction

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Proceedings Article | 15 February 2017 Paper

Fabrication of anisotropic diffractive optical element by using polarization drawing method based on galvanometer scanner

K. Noda, J. Matsubara, K. Kawai, M. Sakamoto, T. Sasaki, H. Okamoto, N. Kawatsuki, K. Goto, H. Ono

Proceedings Volume 10125, 101251K (2017) https://doi.org/10.1117/12.2250750

KEYWORDS: Polarization, Diffractive optical elements, Liquid crystals, Anisotropy, Fresnel lenses, Polarization control, Diffraction, Polymers, Ultraviolet radiation, Optical components

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Proceedings Article | 15 February 2017 Paper

Liquid crystal gratings for advanced control of polarized light propagation fabricated by one-step multiple beam holographic photoalignment

K. Kawai, M. Sakamoto, K. Noda, T. Sasaki, N. Kawatsuki, H. Ono

Proceedings Volume 10125, 101251I (2017) https://doi.org/10.1117/12.2250462

KEYWORDS: Liquid crystals, Polarization, Diffractive optical elements, Ultraviolet radiation, Light wave propagation, Holography, Polymers, Diffraction, Diffraction gratings, Laser beam diagnostics, Beam splitters, Modulation, Jones calculus

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Proceedings Article | 28 August 2014 Paper

Recent progress on phase-mask coronagraphy based on photonic-crystal technology

Naoshi Murakami, Jun Nishikawa, Motohide Tamura, Eugene Serabyn, Wesley Traub, Kurt Liewer, Dwight Moody, John Trauger, Olivier Guyon, Frantz Martinache, Nemanja Jovanovic, Garima Singh, Fumika Oshiyama, Hayato Shoji, Moritsugu Sakamoto, Shoki Hamaguchi, Kazuhiko Oka, Naoshi Baba

Proceedings Volume 9143, 914334 (2014) https://doi.org/10.1117/12.2054790

KEYWORDS: Coronagraphy, Manufacturing, Photomasks, Spiral phase plates, Space telescopes, Telescopes, Light sources, Polarizers, Adaptive optics, Polarization

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Proceedings Article | 21 September 2012 Paper

Coronagraph focal-plane phase masks based on photonic crystal technology: recent progress and observational strategy

Naoshi Murakami, Jun Nishikawa, Wesley Traub, Dimitri Mawet, Dwight Moody, Brian Kern, John Trauger, Eugene Serabyn, Shoki Hamaguchi, Fumika Oshiyama, Moritsugu Sakamoto, Akitoshi Ise, Kazuhiko Oka, Naoshi Baba, Hiroshi Murakami, Motohide Tamura

Proceedings Volume 8442, 844205 (2012) https://doi.org/10.1117/12.925613

KEYWORDS: Coronagraphy, Polarization, Photonic crystals, Manufacturing, Photomasks, Stars, Polarimetry, Spiral phase plates, Phase shift keying, Planets

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Proceedings Article | 11 February 2012 Paper

Diffraction characteristics of optical and polarization vortices generated by an axially symmetric polarizer

Moritsugu Sakamoto, Kazuhiko Oka, Ryuji Morita

Proceedings Volume 8274, 827414 (2012) https://doi.org/10.1117/12.910108

KEYWORDS: Polarization, Diffraction, Optical vortices, Near field diffraction, Spiral phase plates, Polarizers, Optical simulations, Superposition, Numerical simulations, Collimation

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Proceedings Article | 15 September 2011 Paper

Taking the vector vortex coronagraph to the next level for ground- and space-based exoplanet imaging instruments: review of technology developments in the USA, Japan, and Europe

Dimitri Mawet, Naoshi Murakami, Christian Delacroix, Eugene Serabyn, Olivier Absil, Naoshi Baba, Jacques Baudrand, Anthony Boccaletti, Rick Burruss, Russell Chipman, Pontus Forsberg, Serge Habraken, Shoki Hamaguchi, Charles Hanot, Akitoshi Ise, Mikael Karlsson, Brian Kern, John Krist, Andreas Kuhnert, Marie Levine, Kurt Liewer, Stephen McClain, Scott McEldowney, Bertrand Mennesson, Dwight Moody, Hiroshi Murakami, Albert Niessner, Jun Nishikawa, Nada O'Brien, Kazuhiko Oka, Peggy Park, Pierre Piron, Laurent Pueyo, Pierre Riaud, Moritsugu Sakamoto, Motohide Tamura, John Trauger, David Shemo, Jean Surdej, Nelson Tabirian, Wesley Traub, James Wallace, Kaito Yokochi

Proceedings Volume 8151, 815108 (2011) https://doi.org/10.1117/12.896059

KEYWORDS: Coronagraphy, Polarization, Spiral phase plates, Photonic crystals, Liquid crystals, Polymers, Telescopes, Exoplanets, Space telescopes, Optics manufacturing

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Showing 5 of 14 publications

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