Organization
Institute of Materials and Systems for Sustainability AsahiKASEI Innovative Devices Industry-Academia Collaborative Chair Designated assistant professor
Title
Designated assistant professor
ZAHNG Ziyi
Degree 3
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Doctor (Engineering) （ 2023.3 Nagoya University ）
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Master (Engineering) （ 2015.3 The University of Tokyo ）
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Bachelor (Engineering) （ 2013.3 The University of Tokyo ）
Awards 5
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The 45th JSAP Outstanding Paper Award
2024.3 Japanese Society of Applied Physics Continuous-wave lasing of AlGaN-based ultraviolet laser diode at 274.8 nm by current injection
Ziyi Zhang, Maki Kushimoto, Akira Yoshikawa, Leo J. Schowalter, Chiaki Sasaoka, Hiroshi Amano
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The 40th JACG the Best Paper Award
2023.12 The Japanese Association of Crystal Growth Room temperature continuous-wave lasing of AlGaN-based deep ultraviolet laser diode by current injection
Ziyi Zhang, Maki Kushimoto, Tadayoshi Sakai, Naoharu Sugiyama, Leo J. Schowalter, Chiaki Sasaoka, Hiroshi Amano
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The 42th JSAP Outstanding Paper Award
2020.9 Japanese Society of Applied Physics A 271.8 nm deep-ultraviolet laser diode for room temperature operation
Ziyi Zhang, Maki Kushimoto, Tadayoshi Sakai, Naoharu Sugiyama, Leo J. Schowalter, Chiaki Sasaoka, Hiroshi Amano
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2023.12 The International Display Workshops Development of Room Temperature Continuous-Wave Deep Ultraviolet Laser Diodes
Maki Kushimoto, Ziyi Zhang, Akira Yoshikawa, Koji Aoto, Yoshio Honda, Leo J Schowalter, Chiaki Sasaoka, Hiroshi Amano
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ICNS-14 Outstanding Poster Award
2023.11 ICNS Organizing Committee Study on Degradation of Deep-Ultraviolet Laser Diode
Ziyi Zhang
Papers 13
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Key temperature-dependent characteristics of AlGaN-based UV-C laser diode and demonstration of room-temperature continuous-wave lasing Reviewed International journal
Ziyi Zhang, Maki Kushimoto, Akira Yoshikawa, Koji Aoto, Leo J. Schowalter, Chiaki Sasaoka, Hiroshi Amano
Applied Physics Letters Vol. 121 ( 22 ) page： 222103 2022.11
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Continuous-wave lasing of AlGaN-based ultraviolet laser diode at 274.8 nm by current injection Reviewed International journal
Ziyi Zhang, Maki Kushimoto, Akira Yoshikawa, Koji Aoto, Leo J. Schowalter, Chiaki Sasaoka, Hiroshi Amano
Applied Physics Express Vol. 15 ( 4 ) page： 041007 2022.4
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Space charge profile study of AlGaN-based p-type distributed polarization doped claddings without impurity doping for UV-C laser diodes Reviewed International journal
Ziyi Zhang, Maki Kushimoto, Masahiro Horita, Naoharu Sugiyama, Leo J. Schowalter, Chiaki Sasaoka, Hiroshi Amano
Applied Physics Letters Vol. 117 ( 15 ) page： 152104 2020.10
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Design and characterization of a low-optical-loss UV-C laser diode Reviewed International journal
Ziyi Zhang, Maki Kushimoto, Tadayoshi Sakai, Naoharu Sugiyama, Leo J. Schowalter, Chiaki Sasaoka, Hiroshi Amano
Japanese Journal of Applied Physics Vol. 59 ( 9 ) page： 094001 2020.9
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A 271.8 nm deep-ultraviolet laser diode for room temperature operation Reviewed International journal
Ziyi Zhang, Maki Kushimoto, Masahiro Horita, Naoharu Sugiyama, Leo J. Schowalter, Chiaki Sasaoka, and Hiroshi Amano
Applied Physics Express Vol. 12 ( 12 ) page： 124003 2019.12
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Study on Degradation of Deep-Ultraviolet Laser Diode Reviewed International journal
Ziyi Zhang, Maki Kushimoto, Akira Yoshikawa, Koji Aoto, Leo J. Schowalter, Chiaki Sasaoka, Hiroshi Amano
Physica Status Solidi (A) Applications and Materials Science page： 2300946 2024.2
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Impact of unintentionally formed compositionally graded layer on carrier injection efficiency in AlGaN-based deep-ultraviolet laser diodes Reviewed International journal
Ziyi Zhang, Maki Kushimoto, Akira Yoshikawa, Koji Aoto, Leo J. Schowalter, Chiaki Sasaoka, Hiroshi Amano
Applied Physics Letters Vol. 124 ( 6 ) page： 061109 2024.2
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Using low-temperature growth to resolve the composition pulling effect of UV-C LEDs Reviewed International journal
Akira Yoshikawa, Ziyi Zhang, Maki Kushimoto, Koji Aoto, Leo J. Schowalter, Chiaki Sasaoka, Hiroshi Amano
Applied Physics Letters Vol. 123 ( 22 ) page： 221105 2023.11
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Local stress control to suppress dislocation generation for pseudomorphically grown AlGaN UV-C laser diodes Reviewed International journal
Maki Kushimoto, Ziyi Zhang, Akira Yoshikawa, Koji Aoto, Yoshio Honda, Chiaki Sasaoka, Leo J. Schowalter, Hiroshi Amano
Applied Physics Letters Vol. 121 ( 22 ) page： 222101 2022.11
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Threshold increase and lasing inhibition due to hexagonal-pyramid-shaped hillocks in AlGaN-based DUV laser diodes on single-crystal AlN substrate Reviewed International journal
Maki Kushimoto, Ziyi Zhang, Yoshio Honda, Leo J. Schowalter, Chiaki Sasaoka, Hiroshi Amano
Japanese Journal of Applied Physics Vol. 61 ( 1 ) page： 010601 2022.1
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Impact of heat treatment process on threshold current density in AlGaN-based deep-ultraviolet laser diodes on AlN substrate Reviewed International journal
Maki Kushimoto, Ziyi Zhang, Naoharu Sugiyama, Yoshio Honda, Leo J. Schowalter, Chiaki Sasaoka, Hiroshi Amano
Applied Physics Express Vol. 14 ( 5 ) page： abf443 2021.5
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Development of UV-C laser diodes on AlN substrate Reviewed International journal
Maki Kushimoto, Ziyi Zhang, Naoharu Sugiyama, Yoshio Honda, Leo J. Schowalter, Chiaki Sasaoka, Hiroshi Amano
Proceedings of SPIE - The International Society for Optical Engineering Vol. 11686 page： 116860P 2021.3
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On-wafer fabrication of etched-mirror UV-C laser diodes with the ALD-deposited DBR Reviewed International journal
Tadayoshi Sakai, Maki Kushimoto, Ziyi Zhang, Naoharu Sugiyama, Leo J. Schowalter, Chiaki Sasaoka, Hiroshi Amano
Applied Physics Letters Vol. 116 ( 12 ) page： 122101 2020.3
Presentations 7
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Ziyi Zhang
The 81st JSAP Autum Meeting, 2020 2020.9.9 The Japanese Association of Applied Physics
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[The 45th Paper Award Speech] Deep-ultraviolet laser diode using single-crystal AlN substrate Invited
Ziyi Zhang
The 71st JSAP Spring Meeting, 2024 2024.3.23 The Japanese Association of Applied Physics
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Realization of room temperature continuous-wave lasing of deep-ultraviolet laser diode Invited
Ziyi Zhang
JCCG-52 2023.12.5 The Japanese Association of Crystal Growth
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Study on degradation of deep ultraviolet laser diode International conference
Ziyi Zhang
14th International Conference on Nitride Semiconductors 2023 (ICNS-14) 2023.11.16 ICNS Organizing Committee
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Demonstration of continuous wave lasing of deep UV Laser diodes on Single-crystal AlN substrate Invited International conference
Ziyi Zhang
The 9th International Symposium on Organic and Inorganic Electronic Materials and Related Nanotechnologies (EM-NANO2023) 2023.6.8 EM-NANO Organizing Committee
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Realization of continuous-wave lasing of AlGaN-based UVC laser diode Invited International conference
Ziyi Zhang
The 10th Asia-Pacific Workshop on Widegap Semiconductors (APWS2022） 2022.11.17
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Continuous-wave lasing of AlGaN-based UVC laser diode by current injection International conference
Ziyi Zhang
International Workshop on Nitride Semiconductors (IWN2022) 2022.10.12