Prof. Yasufumi Fujiwara Profile

Prof. Yasufumi Fujiwara

Professor at Osaka Univ

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Author

Publications (6)

Proceedings Article | 21 March 2023 Presentation

Towards ultrahigh-resolution micro-LED displays using a monolithic vertically stacked full-color LED

Yasufumi Fujiwara, Shuhei Ichikawa, Dolf Timmerman, Jun Tatebayashi

Proceedings Volume PC12421, (2023) https://doi.org/10.1117/12.2648808

KEYWORDS: Light emitting diodes, LED displays, Terbium, Quantum wells, Europium, Ions, Indium gallium nitride, Green light emitting diodes, Gallium nitride, Distributed Bragg reflectors

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Proceedings Article | 5 March 2021 Presentation

Eu-doped GaN-based red LED for ultrahigh-resolution micro-LED displays

Yasufumi Fujiwara, Shuhei Ichikawa, Dolf Timmerman, Jun Tatebayashi

Proceedings Volume 11686, 1168615 (2021) https://doi.org/10.1117/12.2577199

KEYWORDS: Light emitting diodes, LED displays, Quantum efficiency, Gallium nitride, Europium, Quantum wells, Luminescence, Ions, Indium gallium nitride, High dynamic range imaging

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Proceedings Article | 9 March 2020 Presentation

Electrically controlled RGB color tunability in a single GaN-based LED material through manipulation of Eu3+ emission (Conference Presentation)

Brandon Mitchell, Volkmar Dierolf, Yasufumi Fujiwara

Proceedings Volume 11302, 113020U (2020) https://doi.org/10.1117/12.2542217

KEYWORDS: Light emitting diodes, RGB color model, Ions, Semiconductors, Electrical engineering, Gallium nitride

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Proceedings Article | 25 February 2020 Paper

Strong crystal field splitting and polarization dependence observed in the emission from Eu3+ ions doped into GaN

S. Copelman, H. Austin, D. Timmerman, J. Poplawsky, M. Waite, J. Tatebayashi, S. Ichikawa, Y. Fujiwara, V. Dierolf, B. Mitchell

Proceedings Volume 11302, 113021Z (2020) https://doi.org/10.1117/12.2544005

KEYWORDS: Europium, Gallium nitride, Ions, Phonons, Polarization, Crystals, Light emitting diodes, LED displays, Chemical species, Magnetism

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Proceedings Article | 13 March 2019 Presentation

Fabrication of GaN monolithic doubly-resonant microcavity SHG device on Si trapezoidal structure (Conference Presentation)

Tomoaki Nambu, Tenta Komatsu, Keishi Shiomi, Yasufumi Fujiwara, Masahiro Uemukai, Ryuji Katayama

Proceedings Volume 10918, 109180G (2019) https://doi.org/10.1117/12.2507606

KEYWORDS: Gallium nitride, Optical microcavities, Silicon, Second-harmonic generation, Photomasks, Resonators, Wet etching, Nickel, Optical semiconductors, Semiconductors

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Proceedings Article | 13 March 2019 Presentation

GaN waveguide directional coupler for optical quantum information processing systems (Conference Presentation)

Junya Miwa, Masafumi Kihira, Keishi Shiomi, Yasufumi Fujiwara, Masahiro Uemukai, Ryuji Katayama

Proceedings Volume 10918, 109180J (2019) https://doi.org/10.1117/12.2510634

KEYWORDS: Waveguides, Directional couplers, Quantum information processing, Gallium nitride, Quantum optics, Semiconductors, Light sources, Mach-Zehnder interferometers, Optical communications, Telecommunications

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Showing 5 of 6 publications

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