Dr. Toshihiro Okamoto Profile

Dr. Toshihiro Okamoto

at Cleveland Clinic

SPIE Involvement:

Author

Publications (26)

Proceedings Article | 11 October 2023 Presentation + Paper

Coupling structures between Nb2O5 and plasmonic waveguide for high-speed and wide-steering angle optical phased array

Maaya Tsukamoto, Shun Kamada, Toshihiro Okamoto, Kenzo Yamaguchi, Masanobu Haraguchi

Proceedings Volume 12653, 126530G (2023) https://doi.org/10.1117/12.2677237

KEYWORDS: Waveguides, Phased array optics, Plasmonic waveguides, Niobium, Beam steering, Antennas, Wave propagation, Dielectrics, Crosstalk, Power consumption

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Proceedings Article | 3 October 2023 Presentation + Paper

Optical phased array with high-speed and wide steering angle using organic EO polymer and inorganic waveguide structure

Shun Kamada, Maaya Tsukamoto, Toshihiro Okamoto, Masanobu Haraguchi, Akira Otomo

Proceedings Volume 12653, 126530B (2023) https://doi.org/10.1117/12.2677233

KEYWORDS: Waveguides, Antennas, Polarization, Plasmonic waveguides, Polymers, Polymer multimode waveguides, Niobium, Beam steering, Phased array optics, Crosstalk

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Proceedings Article | 7 April 2023 Poster + Paper

Extraction of alveolar walls in 3D lung micro-images from large-field synchrotron radiation micro-CT using U-Net

Haruki Kurita, Yoshiki Kawata, Hidenobu Suzuki, Keiji Umetani, Yasutaka Nakano, Hiroaki Sakai, Toshihiro Okamoto, Noboru Niki

Proceedings Volume 12463, 1246326 (2023) https://doi.org/10.1117/12.2652484

KEYWORDS: 3D modeling, 3D image processing, Synchrotron radiation, Lung, Computed tomography

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Proceedings Article | 4 April 2022 Presentation + Paper

Pulmonary alveoli cluster analysis of 3D human lung microstructure using synchrotron radiation micro-CT

Kurumi Saito, Keisuke Fukuda, Yoshiki Kawata, Keiji Umetani, Yasutaka Nakano, Hiroaki Sakai, Toshihiro Okamoto, Noboru Niki

Proceedings Volume 12036, 120360G (2022) https://doi.org/10.1117/12.2612692

KEYWORDS: Lung, 3D microstructuring, 3D image processing, Synchrotron radiation, Principal component analysis, Arteries, 3D image reconstruction, Stereoscopy, Image processing algorithms and systems, Image filtering

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Proceedings Article | 4 April 2022 Presentation + Paper

Counting of alveoli in synchrotron radiation 3D CT images using U-Net

Keisuke Fukuda, Kurumi Saito, Yoshiki Kawata, Keiji Umetani, Yasutaka Nakano, Hiroaki Sakai, Toshihiro Okamoto, Noboru Niki

Proceedings Volume 12036, 120360H (2022) https://doi.org/10.1117/12.2612810

KEYWORDS: Lung, 3D image processing, Synchrotron radiation, 3D microstructuring, Computed tomography, Image processing

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Proceedings Article | 5 March 2021 Poster + Presentation

Plasmonic waveguide-based antenna for wide steering angle in the optical phased array

Shun Kamada, Toshihiro Okamoto, Masanobu Haraguchi, Akira Otomo

Proceedings Volume 11689, 116891G (2021) https://doi.org/10.1117/12.2574935

KEYWORDS: Antennas, Waveguides, Phased array optics, Plasmonics, Silicon, Polymers, Polymer multimode waveguides, Light wave propagation, Interfaces, Beam steering

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Proceedings Article | 15 February 2021 Poster + Presentation + Paper

Alveolar sac analysis of 3D human lung microstructure using synchrotron radiation micro-CT

Kurumi Saito, Keisuke Fukuda, Yoshiki Kawata, Noboru Niki, Keiji Umetani, Yasutaka Nakano, Hiroaki Sakai, Toshihiro Okamoto

Proceedings Volume 11600, 116001U (2021) https://doi.org/10.1117/12.2582050

KEYWORDS: Lung, Synchrotron radiation, 3D microstructuring, 3D image processing, Statistical analysis, Quantitative analysis, Optical filters, Emphysema, Computed tomography

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Proceedings Article | 28 February 2020 Paper

3D microstructure analysis of human pulmonary emphysema using a synchrotron radiation CT

Kurumi Saito, Shota Fuketa, Ryouhei Shimatani, Yoshiki Kawata, Noboru Niki, Keiji Umetani, Yasutaka Nakano, Hiroaki Sakai, Toshihiro Okamoto, Harumi Itoh

Proceedings Volume 11317, 113170H (2020) https://doi.org/10.1117/12.2549441

KEYWORDS: Emphysema, Lung, 3D microstructuring, Synchrotron radiation, Capillaries, Blood vessels, 3D image reconstruction, Analytical research, 3D image processing, Visualization

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Proceedings Article | 15 March 2019 Paper

Pulmonary blood vessels extraction from dual-energy CT images using a synchrotron radiation micro-CT

K. Saito, S. Ohnishi , S. Fuketa, Y. Kawata, N. Niki, K. Umetani, H. Sakai, Y. Nakano, T. Okamoto, H. Itoh

Proceedings Volume 10953, 109530G (2019) https://doi.org/10.1117/12.2512369

KEYWORDS: Blood vessels, Lung, Capillaries, Synchrotron radiation, 3D image processing, Image segmentation, X-ray computed tomography, Visualization, Veins, Computed tomography

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Proceedings Article | 17 September 2018 Presentation

Plasmonic resonator devices for integrated application (Conference Presentation)

Masanobu Haraguchi, Shun Kamada, Hiroyuki Okamoto, Toshihiro Okamoto, Salah El-Zohary, Kenzo Yamaguchi, Atsushi Mori

Proceedings Volume 10722, 107220K (2018) https://doi.org/10.1117/12.2320975

KEYWORDS: Resonators, Plasmonics, Sensors, Waveguides, Telecommunications, Surface plasmon polaritons, Modulators, Channel waveguides, Fabrication, Lithography

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Proceedings Article | 12 March 2018 Paper

Bronchial based pulmonary acinus analysis in human lungs using a synchrotron radiation micro-CT

K. Saito, Y. Kobayashi, Y. Kawata, N. Niki, K. Umetani, T. Okamoto, H. Sakai, Y. Nakano, H. Itoh

Proceedings Volume 10578, 105781W (2018) https://doi.org/10.1117/12.2293428

KEYWORDS: Lung, Image segmentation, 3D microstructuring, 3D image processing, Synchrotron radiation, Analytical research, Computed tomography, Synchrotrons, Medical research, Heart

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Proceedings Article | 18 October 2017 Presentation

Plasmon resonance sensors for compact plasmonic integrated device (Conference Presentation)

Masanobu Haraguchi, Shun Kamada, Hiroyuki Okamoto, Toshihiro Okamoto, Salah El-Zohary

Proceedings Volume 10346, 103460B (2017) https://doi.org/10.1117/12.2275421

KEYWORDS: Plasmonics, Sensors, Plasmons, Surface plasmon polaritons, Channel waveguides, Waveguides, Spiral phase plates, Plasmonic sensors, Diffraction, Infrared sensors

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Proceedings Article | 25 August 2017 Paper

Resonance modes in unbalanced Mach-Zehnder interferometers embedded in plasmonic waveguides

Shun Kamada, Toshihiro Okamoto, Masanobu Haraguchi

Proceedings Volume 10346, 1034622 (2017) https://doi.org/10.1117/12.2270594

KEYWORDS: Mach-Zehnder interferometers, Plasmonic waveguides, Resonators, Plasmonics, Finite-difference time-domain method, Plasmons, Integrated circuits, Optical modulators, Sensors, Numerical simulations

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Proceedings Article | 31 October 2016 Paper

A simple and low cost method to fabricate well controllable silicon nanowires based on electrostatic adsorption of PS nanospheres

Salah El-Zohary, Yusuke Iguchi, Toshihiro Okamoto, Masanobu Haraguchi

Proceedings Volume 10019, 100190W (2016) https://doi.org/10.1117/12.2246604

KEYWORDS: Nanowires, Silver, Silicon, Optoelectronics, Adsorption, Picosecond phenomena, Etching, Scanning electron microscopy, Control systems, Semiconducting wafers

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SPIE Journal Paper | 3 February 2015 Open Access

Heterojunction of poly (o-toluidine) and silicon nanowires

Salah E. El-Zohary, Mohamed Shenashen, Ashraf Haleem, Akinori Tsuji, Toshihiro Okamoto, Masanobu Haraguchi

JNP, Vol. 9, Issue 01, 093093, (February 2015) https://doi.org/10.1117/12.10.1117/1.JNP.9.093093

KEYWORDS: Heterojunctions, Silicon, Polymers, Diodes, Scanning electron microscopy, Polymerization, FT-IR spectroscopy, Resistance, Semiconducting wafers, Nanowires

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Proceedings Article | 28 August 2014 Paper

Heterojunction of nano-poly (O-toluidine) on silicon nanowires is investigated as a candidate heterojunction diode

Salah El-Zohary, M. Shenashen, Akinori Tsuji, T. Okamoto, M. Haraguchi

Proceedings Volume 9170, 917006 (2014) https://doi.org/10.1117/12.2062687

KEYWORDS: Heterojunctions, Silicon, Diodes, Nanolithography, Scanning electron microscopy, Polymers, Etching, Polymerization, Semiconducting wafers, Nanowires

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SPIE Journal Paper | 2 June 2014 Open Access

Errata: Resonance-based integrated plasmonic nanosensor for lab-on-chip applications

Salah El-Zohary, Abdulilah Azzazi, Hiroyuki Okamoto, Toshihiro Okamoto, Masanobu Haraguchi, Mohamed Swillam

JNP, Vol. 8, Issue 01, 089997, (June 2014) https://doi.org/10.1117/12.10.1117/1.JNP.8.089997

KEYWORDS: Plasmonics, Nanosensors, Physics, Control systems, Optics

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Proceedings Article | 19 February 2014 Paper

Design optimization and fabrication of plasmonic nano sensor

Salah El-Zohary, Abdulilah Azzazi, Hiroyuki Okamoto, Toshihiro Okamoto, Masanobu Haraguchi, Mohamed Swillam

Proceedings Volume 8994, 89940V (2014) https://doi.org/10.1117/12.2038858

KEYWORDS: Sensors, Refractive index, Plasmonics, Resonators, Finite-difference time-domain method, Waveguides, Nanolithography, Fabrication, Ion beams, Silver

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SPIE Journal Paper | 20 November 2013 Open Access

Resonance-based integrated plasmonic nanosensor for lab-on-chip applications

Salah El-Zohary, Abdulilah Azzazi, Toshihiro Okamoto, Masanobu Haraguchi, Mohamed Swillam, Hiroyuki Okamoto

JNP, Vol. 7, Issue 01, 073077, (November 2013) https://doi.org/10.1117/12.10.1117/1.JNP.7.073077

KEYWORDS: Resonators, Refractive index, Plasmonics, Sensors, Nanosensors, Finite-difference time-domain method, Plasmonic sensors, Waveguides, Computer simulations, Biosensing

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Proceedings Article | 9 October 2012 Paper

Development of plasmonic racetrack resonators with a trench structure

Hiroyuki Okamoto, Kenzo Yamaguchi, Masanobu Haraguchi, Toshihiro Okamoto

Proceedings Volume 8457, 845723 (2012) https://doi.org/10.1117/12.929373

KEYWORDS: Resonators, Plasmonics, Integrated optical circuits, Waveguides, Silver, Plasmons, Optical components, Polaritons, Scanning electron microscopy, Finite-difference time-domain method

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Proceedings Article | 11 September 2010 Paper

Optical resonator in gap plasmon waveguide

Masanobu Haraguchi, Hidenori Sokabe, Tatsuya Okuno, Toshihiro Okamoto, Masuo Fukui

Proceedings Volume 7757, 775720 (2010) https://doi.org/10.1117/12.861131

KEYWORDS: Resonators, Plasmons, Waveguides, Silver, Transmittance, Light scattering, Optical resonators, Reflectivity, Light wave propagation, Dielectrics

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Proceedings Article | 2 September 2009 Paper

Gap plasmon waveguide with a stub: structure for a wavelength selective device

Masanobu Haraguchi, Kazunori Iuchi, Hidenori Sokabe, Tatsuya Okuno, Toshihiro Okamoto, Masuo Fukui, Kazumasa Okamoto, Seiichi Tagawa

Proceedings Volume 7395, 73950U (2009) https://doi.org/10.1117/12.825789

KEYWORDS: Waveguides, Plasmons, Silver, Wave propagation, Metals, Transmittance, Numerical simulations, Plasmonics, Finite-difference time-domain method, Dielectrics

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Proceedings Article | 28 August 2008 Paper

Plasmonic waveguides with wavelength selective function

Masanobu Haraguchi, Yosuke Matsuzaki, Tatsuro Tsuzura, Toshihiro Okamoto, Masuo Fukui, Kazumasa Okamoto, Shu Seki, Seiichi Tagawa

Proceedings Volume 7033, 70330V (2008) https://doi.org/10.1117/12.794541

KEYWORDS: Waveguides, Plasmons, Transmittance, Mirrors, Resonators, Plasmonics, Plasmonic waveguides, Fabry–Perot interferometers, Metals, Dielectrics

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Proceedings Article | 11 September 2006 Paper

Characteristics of plasmonic waveguides for coupled wedge plasmons

Masanobu Haraguchi, David Pile, Kenzo Yamaguchi, Yosuke Matsuzaki, Naoki Sato, Dmitri Gramotnev, Masuo Fukui, Toshihiro Okamoto

Proceedings Volume 6324, 632405 (2006) https://doi.org/10.1117/12.680307

KEYWORDS: Waveguides, Glasses, Wave propagation, Silver, Plasmonic waveguides, Radio propagation, Light wave propagation, Plasmons, Dielectrics, Finite-difference time-domain method

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Proceedings Article | 11 September 2006 Paper

Characteristics of plasmonic waveguides and nonlinear metallic particles

Masuo Fukui, Toshihiro Okamoto, Toshiaki Ogawa, Masanobu Haraguchi, David F. P. Pile, Dmitri Gramotnev

Proceedings Volume 6324, 632401 (2006) https://doi.org/10.1117/12.679397

KEYWORDS: Plasmons, Particles, Finite-difference time-domain method, Light scattering, Distance measurement, Wave propagation, Silver, Plasmonic waveguides, Cadmium sulfide, Light wave propagation

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Proceedings Article | 18 August 2005 Paper

Numerical simulations of localized surface plasmons at a nano silver particle on a glass substrate

Masanobu Haraguchi, Masahiko Noguchi, Masamitsu Fujii, Toshihiro Okamoto, Masuo Fukui

Proceedings Volume 5928, 592811 (2005) https://doi.org/10.1117/12.616519

KEYWORDS: Particles, Optical spheres, Silver, Dielectrics, Glasses, Image enhancement, Finite-difference time-domain method, Metals, Mirrors, Nano silver particles

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Showing 5 of 26 publications

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