Dr. Keigo Masuda Profile

Dr. Keigo Masuda

at Chiba Univ

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Author

Publications (9)

Proceedings Article | 20 August 2020 Presentation

Flower shaped surface relief of azo-polymers created by illumination of ultrafast optical vortex laser

Ami Shiraishi, Keigo Masuda, Katsuhiko Miyamoto, Takashige Omatsu

Proceedings Volume 11477, 1147705 (2020) https://doi.org/10.1117/12.2568317

KEYWORDS: Optical vortices, Ultrafast phenomena, Laser optics, 3D optical data storage, Absorption, Optical storage, Spiral phase plates, Continuous wave operation, Wavefronts, Ultrafast lasers

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Proceedings Article | 15 June 2020 Paper

Spinning twin-mode generation in a bacteriorhodopsin suspension

Keigo Masuda, Taiki Yoshizawa, Junhyung Lee, Masataka Shinada, Yoshiko Okada-Shudo, Takeshi Murata, Kohei Toyoda, Katsuhiko Miyamoto, Takashige Omatsu

Proceedings Volume 11522, 1152209 (2020) https://doi.org/10.1117/12.2573762

KEYWORDS: Optical vortices, Spatial solitons, Absorption, Singular optics, Waveguides, Spiral phase plates, Electronics engineering, Wavefronts, Super resolution microscopy, Optical communications

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Proceedings Article | 15 June 2020 Paper

Picosecond optical vortex induced chiral structures of azo-polymers via two photon absorption

Ami Shiraishi, Keigo Masuda, Katsuhiko Miyamoto, Takashige Omatsu

Proceedings Volume 11522, 1152213 (2020) https://doi.org/10.1117/12.2573511

KEYWORDS: Optical vortices, Picosecond phenomena, Absorption, Spatial resolution, Diffraction, Optical storage, Spiral phase plates, Thin films, Pulsed laser operation, Objectives

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SPIE Journal Paper | 18 March 2020 Open Access

Picosecond optical vortex-induced chiral surface relief in an azo-polymer film

Keigo Masuda, Ryo Shinozaki, Ami Shiraishi, Mitsuki Ichijo, Keisaku Yamane, Katsuhiko Miyamoto, Takashige Omatsu

JNP, Vol. 14, Issue 01, 016012, (March 2020) https://doi.org/10.1117/12.10.1117/1.JNP.14.016012

KEYWORDS: Optical vortices, Polymers, Picosecond phenomena, Absorption, Spiral phase plates, Atomic force microscopy, Tolerancing, Spatial resolution, Scattering, Laser processing

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SPIE Journal Paper | 18 March 2020 Open Access

Twisted mass transport enabled by the angular momentum of light

Takashige Omatsu, Keigo Masuda, Katsuhiko Miyamoto, Kohei Toyoda, Natalia Litchinitser, Yoshihiko Arita, Kishan Dholakia

JNP, Vol. 14, Issue 01, 010901, (March 2020) https://doi.org/10.1117/12.10.1117/1.JNP.14.010901

KEYWORDS: Optical vortices, Amplitude modulation, Polarization, Near field optics, Near field, Gaussian beams, Gold, Wavefronts, Absorption, Silicon

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Proceedings Article | 10 September 2019 Presentation

Bacteriorhodopsin suspensions breaks spatial symmetry of an optical vortex field (Conference Presentation)

Keigo Masuda, Taiki Yoshizawa, Tomoki Akiyama, Yoshiko Okada-Shudo, Takeshi Murata, Kohei Toyoda, Katsuhiko Miyamoto, Takashige Omatsu

Proceedings Volume 11098, 110980K (2019) https://doi.org/10.1117/12.2528668

KEYWORDS: Optical vortices, Wavefronts, Wave propagation, Silicon, Metals, Polymers, Picosecond phenomena

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Proceedings Article | 24 April 2018 Paper

Shrinking optical vortex to the nanoscale

Jingbo Sun, Keigo Masuda, Tianboyu Xu, Katsuhiko Miyamoto, Takashige Omatsu, Natalia Litchinitser

Proceedings Volume 10712, 107120T (2018) https://doi.org/10.1117/12.2324328

KEYWORDS: Optical vortices, Structured light, Diffraction, Chemical species, Quantum dots, Absorption, Gaussian beams, Scanning electron microscopy, Linear polarizers, Scientific research

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Proceedings Article | 24 April 2018 Paper

Optical vortex induced chiral mass-transport of azo-polymer through two photon absorption

Keigo Masuda, Shogo Nakano, Yoshinori Kinezuka, Mitsuki Ichijo, Ryo Shinozaki, Katsuhiko Miyamoto, Takashige Omatsu

Proceedings Volume 10712, 107120H (2018) https://doi.org/10.1117/12.2319377

KEYWORDS: Optical vortices, Absorption, Picosecond phenomena, Diffraction, Ultrafast phenomena, Spiral phase plates, Scientific research, Singular optics, Laser processing, Visible radiation

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Proceedings Article | 18 April 2017 Paper

Circularly polarized lights twist azo-polymer to form helical surface relief

Keigo Masuda, Shogo Nakano, Daisuke Barada, Katsuhiko Miyamoto, Takashige Omatsu

Proceedings Volume 10252, 102520M (2017) https://doi.org/10.1117/12.2275034

KEYWORDS: Continuous wave operation, Objectives, Natural surfaces, Visible radiation, Integrated optical circuits, Holography, Data storage, Optical vortices, Singular optics, Laser processing

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Showing 5 of 9 publications

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