Mr. Kei Umesato Profile

Kei Umesato

at Chiba Univ

SPIE Involvement:

Author

Publications (5)

Proceedings Article | 8 December 2022 Paper

Microprinting of fluorescent dye droplets by optical vortex laser induced forward transfer

Ken-ichi Yuyama, Haruki Kawaguchi, Kei Umesato, Katsuhiko Miyamoto, Takashige Omatsu

Proceedings Volume 12479, 124790C (2022) https://doi.org/10.1117/12.2658793

KEYWORDS: Optical vortices, Receivers, Pulsed laser operation, Laser optics, Rhodamine B, Photomicroscopy, Spiral phase plates, Optical lithography, Gaussian beams, Liquids

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Proceedings Article | 27 October 2021 Paper

Optical vortex induced microdroplet with a plasmonic nanocore

Haruki Kawaguchi, Kei Umesato, Kanta Takahashi, Keisaku Yamane, Ken-ichi Yuyama, Satoyuki Kawano, Katsuhiko Miyamoto, Takadhige Omatsu

Proceedings Volume 11926, 119260G (2021) https://doi.org/10.1117/12.2616033

KEYWORDS: Plasmonics, Optical vortices, Nanoparticles, Gold, Receivers, Particles, Liquids, Diffraction, Spatial resolution, Laser applications

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Proceedings Article | 1 August 2021 Presentation

Plasmonic nanocore in a water microdroplet with optical vortex

Haruki Kawaguchi, Kie Umesato, Kanta Takahashi, Keisaku Yamane, Kein-ichi Yuyama, Satoyuki Kawano, Katsuhiko Miyamoto, Takashige Omatsu

Proceedings Volume 11812, 118120C (2021) https://doi.org/10.1117/12.2594071

KEYWORDS: Plasmonics, Optical vortices, Water, Spatial resolution, Diffraction, Light-matter interactions, Wavefronts, Telecommunications, Surface enhanced Raman spectroscopy, Super resolution

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Proceedings Article | 15 June 2020 Paper

Microscale perovskite crystal creation by optical vortex laser induced forward transfer

Haruki Kawaguchi, Kei Umesato, Ken-ichi Yuyama, Katsuhiko Miyamoto, Takashige Omatsu

Proceedings Volume 11522, 1152215 (2020) https://doi.org/10.1117/12.2573524

KEYWORDS: Crystals, Perovskite, Optical vortices, Laser optics, Luminescence, Receivers, Laser crystals, Crystal optics, Laser applications, Lead

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Proceedings Article | 15 June 2020 Paper

Fractional optical vortex creates a curved "spin-jet"

Haruki Kawaguchi, Kei Umesato, Keisaku Yamane, Katsuhiko Miyamoto, Takashige Omatsu

Proceedings Volume 11522, 1152214 (2020) https://doi.org/10.1117/12.2573523

KEYWORDS: Optical vortices, Optical lithography, Receivers, Spatial resolution, Spiral phase plates, Metals, Superposition, Applied physics, Printing, Wavefronts

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