Prof. Shiyoshi Yokoyama Profile

Prof. Shiyoshi Yokoyama

at Kyushu Univ

SPIE Involvement:

Conference Program Committee | Author

Publications (25)

Proceedings Article | 14 March 2023 Presentation

High efficiency electro-optic modulators of strong Pockels effect waveguides

Shiyoshi Yokoyama, Jiawei Mao, Futa Uemura, Alisa Bannaron, Hiromu Sato

Proceedings Volume PC12418, PC124180G (2023) https://doi.org/10.1117/12.2654713

KEYWORDS: Waveguides, Electrooptic modulators, Optics manufacturing, Transmitters, Transceivers, Silicon photonics, Silicon films, Silicon, Phase shift keying, Modulators

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Proceedings Article | 10 March 2020 Presentation

High-thermal stable poly(norbornene-dicarboximide) for electro-optic polymer modulator (Conference Presentation)

Alisa Bannaron, Andrew Spring, Shiyoshi Yokoyama

Proceedings Volume 11277, 112770I (2020) https://doi.org/10.1117/12.2545453

KEYWORDS: Polymers, Modulators, Electro optic polymers, Chromophores, Electro optics, Optoelectronics, Optical components, Temperature metrology, Resistance, Thermography

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Proceedings Article | 5 March 2019 Presentation

Electro-optic (EO) polymer with highly thermal stable norbornene-based polymer backbone (Conference Presentation)

Alisa Bannaron, Andrew Mark Spring, Shiyoshi Yokoyama

Proceedings Volume 10915, 109150K (2019) https://doi.org/10.1117/12.2508328

KEYWORDS: Polymers, Electro optic polymers, Electro optics, Chromophores, Polymerization, Organic materials, Optical components, Resistance, Glasses, Transparency

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Proceedings Article | 14 March 2018 Presentation

Temperature stable electro-optic polymer modulators using high Tg polymer matrix (Conference Presentation)

Hiroki Miura, Shiyoshi yokoyama

Proceedings Volume 10529, 105290N (2018) https://doi.org/10.1117/12.2291287

KEYWORDS: Polymers, Electro optic polymers, Modulators, Polymer multimode waveguides, Waveguides, Chromophores, Mach-Zehnder interferometers, Nonlinear optics, Electro optics, Glasses

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Proceedings Article | 14 March 2018 Presentation

Design and fabrication of Bragg-grating-coupled high Q-factor ring resonator using liquid-source CVD-deposited Si3N4 film at 150deg C (Conference Presentation)

Xiaoyang Cheng, Jianxun Hong, Shiyoshi Yokoyama

Proceedings Volume 10535, 1053510 (2018) https://doi.org/10.1117/12.2289217

KEYWORDS: Resonators, Liquids, Fiber Bragg gratings, Chemical vapor deposition, Integrated optics, Low pressure chemical vapor deposition, Plasma enhanced chemical vapor deposition, Photonic crystals, Silicon, Silicon films

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Proceedings Article | 28 April 2017 Presentation

Broadband hybrid electro-optic polymer device to silicon Mach-Zehnder modulator (Conference Presentation)

Shiyoshi Yokoyama, HIroki Miura, Hiromu Sato, Feng Qiu

Proceedings Volume 10109, 101090P (2017) https://doi.org/10.1117/12.2253292

KEYWORDS: Optical lithography, Waveguides, Polymers, Modulators, Silicon, Polymer multimode waveguides, Electro optic polymers, Electrooptic modulators, Electro optics, Fabrication

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Proceedings Article | 3 November 2016 Presentation

Hybrid electro-optic polymer modulator compatible to silicon photonic waveguide (Conference Presentation)

Shiyoshi Yokoyama

Proceedings Volume 9939, 99390C (2016) https://doi.org/10.1117/12.2237450

KEYWORDS: Waveguides, Polymers, Modulators, Silicon, Electro optics, Measurement devices, Electro optic polymers, Silicon photonics, Cladding, Modulation

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Proceedings Article | 10 September 2013 Paper

High efficiency electro-optic polymer/TiO2 waveguide modulators

Feng Qiu, Shiyoshi Yokoyama

Proceedings Volume 8827, 88270A (2013) https://doi.org/10.1117/12.2024803

KEYWORDS: Polymers, Waveguides, Modulators, Polymer multimode waveguides, Cladding, Refractive index, Resonators, Electro optic polymers, Electrodes, Titanium dioxide

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Proceedings Article | 6 March 2013 Paper

Electro-optic waveguide with conductive chromophore contained polymer cladding

Kazuhiro Yamamoto, Feng Yu, Lu Li, Shiyoshi Yokoyama, Akira Otomo, Kei Yasui, Masaaki Ozawa

Proceedings Volume 8622, 86221K (2013) https://doi.org/10.1117/12.2003901

KEYWORDS: Polymers, Cladding, Chromophores, Waveguides, Polymer multimode waveguides, Electro optic polymers, Electro optics, Glasses, Polymethylmethacrylate, Gold

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Proceedings Article | 21 February 2013 Paper

On-chip superfocusing of surface plasmon using metal-coat tapered optical fiber pairs with nano-gap structures

Kazuhiro Yamamoto, Shiyoshi Yokoyama, Akira Otomo

Proceedings Volume 8632, 863228 (2013) https://doi.org/10.1117/12.2001735

KEYWORDS: Spiral phase plates, Metals, Tapered optical fibers, Surface plasmons, Etching, Gold, Silicon, Silver, Optical fibers, Near field

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Proceedings Article | 21 February 2011 Paper

Two-photon excited fluorescence from colloidal quantum dots on SiN photonic crystals

Xingsheng Xu, Toshiki Yamada, Shiyoshi Yokoyama

Proceedings Volume 7937, 79371F (2011) https://doi.org/10.1117/12.876865

KEYWORDS: Luminescence, Photonic crystals, Quantum dots, Excitons, Electron beam lithography, Femtosecond phenomena, Semiconductors, Biomedical optics, Light emitting diodes, Quantum wells

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Proceedings Article | 5 November 2010 Paper

Donor strengthening strategy for FTC-based organic nonlinear chromophore

Xianqing Piao, Xianmin Zhang, Shiyoshi Yokoyama, Hideki Miki, Isao Aoki, Akira Otomo

Proceedings Volume 7846, 784609 (2010) https://doi.org/10.1117/12.871734

KEYWORDS: Chromophores, Nonlinear optics, Polymers, Bridges, Absorption, Polymethylmethacrylate, Glasses, Electro optics, Polymer thin films, Molecules

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Proceedings Article | 1 March 2010 Paper

Hyper-branched polymer for electro-optic applications

Xianqing Piao, Yuichi Mori, Xianmin Zhang, Shinichiro Inoue, Shiyoshi Yokoyama

Proceedings Volume 7599, 75990G (2010) https://doi.org/10.1117/12.840060

KEYWORDS: Polymers, Chromophores, Nonlinear optics, Composites, Electro optic polymers, Polymethylmethacrylate, Electro optics, Glasses, FT-IR spectroscopy, Telecommunications

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Proceedings Article | 3 December 2009 Paper

Reflective planar microcavity with enhanced electro-optic activity of a poled polymer

A. Inoue, S. Inoue, S. Yokoyama

Proceedings Volume 7631, 763129 (2009) https://doi.org/10.1117/12.852184

KEYWORDS: Optical microcavities, Polymers, Reflectivity, Electro optics, Electro optic polymers, Mirrors, Modulation, Electroactive polymers, Reflection, Electrodes

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Proceedings Article | 17 February 2009 Paper

Enhancing the two-photon excited fluorescence by two-dimensional nonlinear optical-polymer photonic crystals

Shin-ichiro Inoue, Shiyoshi Yokoyama

Proceedings Volume 7213, 72131I (2009) https://doi.org/10.1117/12.808884

KEYWORDS: Waveguides, Prisms, Dispersion, Reflectance spectroscopy, Photonic crystals, Reflectivity, Polymers, Luminescence, Spectroscopy, Cladding

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Proceedings Article | 17 February 2009 Paper

One dimensional polymeric photonic crystal doped with second-order nonlinear optical chromophore

Azusa Inoue, Shin-ichiro Inoue, Shiyoshi Yokoyama, Keisuke Kojima, Kei Yasui, Masaaki Ozawa, Keisuke Odoi

Proceedings Volume 7213, 72131C (2009) https://doi.org/10.1117/12.809268

KEYWORDS: Polymers, Nonlinear optics, Chromophores, Refractive index, Photonic crystals, Mirrors, Electrodes, Gold, Absorption, Electro optic polymers

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Proceedings Article | 2 September 2008 Paper

Two-photon polymer laser writing in the photonic crystal

Shiyoshi Yokoyama, Shinichiro Inoue, Kensuke Sasaki

Proceedings Volume 7049, 70490K (2008) https://doi.org/10.1117/12.794281

KEYWORDS: Polymers, Photonic crystals, Polymerization, Luminescence, Dendrimers, Photopolymerization, Confocal microscopy, Waveguides, Pulsed laser operation, Absorption

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Proceedings Article | 18 October 2006 Paper

Two-photon photopolymeric micro-nano fabrication for polymer device application

Shiyoshi Yokoyama, Tatsuo Nakahama, Hideki Miki

Proceedings Volume 6376, 63760F (2006) https://doi.org/10.1117/12.695090

KEYWORDS: Polymers, Photonic crystals, Dendrimers, Polymerization, Photopolymerization, Luminescence, Absorption, Active optics, Confocal microscopy, Energy transfer

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Proceedings Article | 14 September 2006 Paper

Photonic applications of the supermolecular nanostructures with photophysical processes controlled

Akira Otomo, Shiyoshi Yokoyama, Shinro Mashiko

Proceedings Volume 6320, 63200H (2006) https://doi.org/10.1117/12.681397

KEYWORDS: Molecules, Dendrimers, Energy transfer, Molecular interactions, Molecular energy transfer, Luminescence, Oxygen, Rhodamine B, Absorption, Laser scattering

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Proceedings Article | 6 December 2005 Paper

Nanoimprint technology for application to photonic devices

Masashi Nakao, Shiyoshi Yokoyama, Hideki Masuda

Proceedings Volume 6050, 605001 (2005) https://doi.org/10.1117/12.649216

KEYWORDS: Nanoimprint lithography, Nanotechnology, Photonic crystals, Silicon carbide, Corundum, Gallium arsenide, Silicon, Lithography, Dye lasers, Nickel

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Proceedings Article | 6 December 2005 Paper

Polymer-based sub-micrometer device for optical applications

Shiyoshi Yokoyama, Tatsuo Nakahama, Shinro Mashiko, Masashi Nakao, Kazuyuki Nishio, Hideki Masuda

Proceedings Volume 6050, 60500N (2005) https://doi.org/10.1117/12.667128

KEYWORDS: Polymers, Photonic crystals, Dendrimers, Polymerization, Luminescence, Photopolymerization, Absorption, Active optics, Confocal microscopy, Energy transfer

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Proceedings Article | 23 August 2005 Paper

Photonic crystal templates for organic solid-state laser

Shiyoshi Yokoyama, Tatsuo Nakahama, Shinro Mashiko, Masashi Nakao, Motohiro Yamada, Kazuyuki Nishio, Hideki Masuda

Proceedings Volume 5926, 59260Q (2005) https://doi.org/10.1117/12.616038

KEYWORDS: Photonic crystals, Aluminum, Refractive index, Dielectrics, Laser crystals, Solid state lasers, Reflection, Polymers, Beam controllers, Modes of laser operation

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Proceedings Article | 19 August 2005 Paper

Two-photon-induced polymerization in a laser gain medium for optical microstructure

S. Yokoyama, T. Nakahama, H. Miki, S. Mashiko

Proceedings Volume 5934, 593403 (2005) https://doi.org/10.1117/12.616083

KEYWORDS: Polymers, Polymerization, Dendrimers, Optical microcavities, Photopolymerization, Absorption, Confocal microscopy, Active optics, Refractive index, Luminescence

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Proceedings Article | 18 December 2002 Paper

Inter- and intra-molecular energy transfers of encapsulated dyes in dendrimers

Akira Otomo, Minniu Zhou, Seiichi Furumi, Shiyoshi Yokoyama, Shinro Mashiko

Proceedings Volume 4798, (2002) https://doi.org/10.1117/12.452095

KEYWORDS: Dendrimers, Energy transfer, Molecular energy transfer, Molecules, Absorption, Absorbance, Rhodamine B, Luminescence, Optoelectronics, Molecular interactions

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Proceedings Article | 7 December 2001 Paper

Remarkable optical properties of dendrimers for laser applications

Akira Otomo, Sonoko Otomo, Shiyoshi Yokoyama, Tatsuo Nakahama, Shinjo Mashiko

Proceedings Volume 4461, (2001) https://doi.org/10.1117/12.449831

KEYWORDS: Dendrimers, Laser scattering, Scattering, Waveguides, Oxygen, Polymers, Molecules, Optical properties, Polymer multimode waveguides, Polymethylmethacrylate

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