Dr. Yuusuke Takashima Profile

Dr. Yuusuke Takashima

at Tokushima Univ

SPIE Involvement:

Author

Publications (7)

Proceedings Article | 5 March 2022 Poster

Improvement of crystal orientation in AlN with controlled inversion domain

Shota Tsuda, Takumi Miyagawa, Reiya Aono, Atsushi Tomita, Hideki Hirayama, Yuusuke Takashima, Yoshiki Naoi, Kentaro Nagamatsu

Proceedings Volume PC12001, PC120011C (2022) https://doi.org/10.1117/12.2607577

KEYWORDS: Aluminum nitride, Sapphire, Light emitting diodes, Oxygen, Diffusion, Deep ultraviolet, X-rays, Ultraviolet light emitting diodes, Polarization, Diffraction

Proceedings Article | 5 March 2022 Poster

Threshold temperature in annihilation radius of dislocation for AlN

Shota Tsuda, Takumi Miyagawa, Reiya Aono, Atsushi Tomita, Hideki Hirayama, Yuusuke Takashima, Yoshiki Naoi, Kentaro Nagamatsu

Proceedings Volume PC12001, PC120011B (2022) https://doi.org/10.1117/12.2607569

KEYWORDS: Aluminum nitride, Aluminum, X-rays, Vapor phase epitaxy, Ultraviolet light emitting diodes, Sapphire, Luminous efficiency, Light emitting diodes, Interfaces, Gallium nitride

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Proceedings Article | 27 October 2021 Paper

Design of AlN-subwavelength grating for deep ultraviolet wavelength reflector operating at 244 nm of wavelength

Yuusuke Takashima, Atsuki Sasada, Kentaro Nagamatsu, Masanobu Haraguchi, Yoshiki Naoi

Proceedings Volume 11926, 1192618 (2021) https://doi.org/10.1117/12.2616175

KEYWORDS: Deep ultraviolet, Reflectivity, Reflectors, Aluminum nitride, Polarization, Refractive index, Optical design, Finite-difference time-domain method, Ultraviolet radiation, Optical components

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Proceedings Article | 21 August 2020 Presentation + Paper

Magnetically tunable visible reflectivity utilizing the electron accumulation in indium-tin-oxide waveguide layer with subwavelength grating

Y. Okano, Y. Takashima, M. Haraguchi, Y. Naoi

Proceedings Volume 11467, 114671U (2020) https://doi.org/10.1117/12.2568382

KEYWORDS: Magnetic sensors, Sensors, Waveguides

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Proceedings Article | 3 September 2019 Paper

Ni subwavelength grating/SiO2/Ag based optical magnetic field sensor with normal incident geometry

Yuusuke Takashima, Kouhei Moriiwa, Masanobu Haraguchi, Yoshiki Naoi

Proceedings Volume 11089, 110891V (2019) https://doi.org/10.1117/12.2529017

KEYWORDS: Magnetic sensors, Sensors, Ferromagnetics

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Proceedings Article | 4 March 2019 Paper

Optical magnetic field sensor based on guided-mode resonance with Ni subwavelength grating/waveguide structure

Yuusuke Takashima, Masanobu Haraguchi, Yoshiki Naoi

Proceedings Volume 10928, 109281S (2019) https://doi.org/10.1117/12.2509490

KEYWORDS: Magnetic sensors, Waveguides, Sensors, Diffraction

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SPIE Journal Paper | 24 June 2015

Influence of low-contrast subwavelength grating shape on polarization characteristics of GaN-based light-emitting diode emissions

Yuusuke Takashima, Ryo Shimizu, Masanobu Haraguchi, Yoshiki Naoi

OE, Vol. 54, Issue 06, 067112, (June 2015) https://doi.org/10.1117/12.10.1117/1.OE.54.6.067112

KEYWORDS: Polarization, Light emitting diodes, Silica, Gallium nitride, Dielectric polarization, Electromagnetism, Finite-difference time-domain method, Transmittance, Refractive index, Blue light emitting diodes

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Showing 5 of 7 publications

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