Updated on 2024/04/19

写真a

 
ZAHNG Ziyi
 
Organization
Institute of Materials and Systems for Sustainability AsahiKASEI Innovative Devices Industry-Academia Collaborative Chair Designated assistant professor
Title
Designated assistant professor

Degree 2

  1. Doctor (Engineering) （ 2023.3   Nagoya University ） 

  2. 修士(工学) （ 2015.3   東京大学 ） 

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Awards 1

  1. 42nd JSAP Outstanding Paper Award Recipients 2020

    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, and Hiroshi Amano

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    Award type：Honored in official journal of a scientific society, scientific journal  Country：Japan

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Papers 8

  1. Space charge profile study of AlGaN-based p-type distributed polarization doped claddings without impurity doping for UV-C laser diodes Reviewed

    Ziyi Zhang, Maki Kushimoto, Masahiro Horita, Naoharu Sugiyama, Leo J. Schowalter, Chiaki Sasaoka, and Hiroshi Amano

    Applied Physics Letters   Vol. 117   page： 152104   2020.10

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： /10.1063/5.0027789

  2. On-wafer fabrication of etched-mirror UV-C laser diodes with the ALD-deposited DBR Reviewed

    Tadayoshi Sakai, Maki Kushimoto, Ziyi Zhang, Naoharu Sugiyama, Leo J. Schowalter, Yoshio Honda, Chiaki Sasaoka, and Hiroshi Amano

    Applied Physics Letters   Vol. 116 ( 12 ) page： 122101   2020.3

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    Language：Japanese   Publishing type：Research paper (scientific journal)  

    DOI： 10.1063/1.5145017

    Web of Science

  3. Space charge profile study of AlGaN-based p-type distributed polarization doped claddings without impurity doping for UV-C laser diodes

    Zhang Z., Kushimoto M., Horita M., Sugiyama N., Schowalter L.J., Sasaoka C., Amano H.

    Applied Physics Letters   Vol. 117 ( 15 )   2020.10

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    Publisher：Applied Physics Letters  

    The space charge density profile of the nondoped AlGaN-based p-type cladding layer for UV-C laser diodes realized by distributed polarization doping is examined theoretically and experimentally. The analysis of the capacitance-voltage measurement revealed that the average effective acceptor density of 4.2×1017 cm-3 is achieved even without impurity doping, and it is in good agreement with the theoretical prediction from the measured Al composition profile. This result suggests that the cladding layer is ideal for UV-C LDs because it provides sufficient hole injection while potentially avoiding internal losses due to impurity doping.

    DOI： 10.1063/5.0027789

    Scopus

  4. Design and characterization of a low-optical-loss UV-C laser diode Reviewed

    Ziyi Zhang, Maki Kushimoto, Tadayoshi Sakai, Naoharu Sugiyama, Leo J. Schowalter, Chiaki Sasaoka, and Hiroshi Amano

    Japanese Journal of Applied Physics   Vol. 59 ( 9 ) page： 094001   2020.9

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    Language：Japanese   Publishing type：Research paper (scientific journal)  

    DOI： 10.35848/1347-4065/abaac6

    Scopus

  5. Demonstration of a deep-ultraviolet laser diode on single crystal AlN substrate operating under current injection at room temperature

    Zhang Ziyi, Kushimoto Maki, Sakai Tadayoshi, Sugiyama Naoharu, Schowalter Leo.J., Sasaoka Chiaki, Amano Hiroshi

    JSAP Annual Meetings Extended Abstracts   Vol. 2020.2 ( 0 ) page： 550 - 550   2020.8

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    Language：Japanese   Publisher：The Japan Society of Applied Physics  

    DOI： 10.11470/jsapmeeting.2020.2.0_550

    CiNii Research

  6. Room temperature pulsed current operation of AlGaN UV-C LD with ALD deposited DBR

    Sakai Tadayoshi, Kushimoto Maki, Zhang Ziyi, Sugiyama Naoharu, Honda Yoshio, Sasaoka Chiaki, Amano Hiroshi

    JSAP Annual Meetings Extended Abstracts   Vol. 2020.1 ( 0 ) page： 3129 - 3129   2020.2

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    Language：Japanese   Publisher：The Japan Society of Applied Physics  

    DOI： 10.11470/jsapmeeting.2020.1.0_3129

    CiNii Research

  7. A 271.8 nm deep-ultraviolet laser diode for room temperature operation Reviewed

    Ziyi Zhang, Maki Kushimoto, Tadayoshi Sakai, Naoharu Sugiyama, Leo J. Schowalter, Chiaki Sasaoka and Hiroshi Amano

    Applied Physics Express   Vol. 12 ( 12 ) page： 124003   2019.12

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    Language：Japanese   Publishing type：Research paper (scientific journal)  

    DOI： 10.7567/1882-0786/ab50e0

    Web of Science

    Scopus

  8. Analysis of AlGaN/AlGaN-MQW structure by atom probe tomography (APT)

    Yoshikawa Akira, Nagatomi Takaharu, Zhang Ziyi, Nagase Kazuhiro

    JSAP Annual Meetings Extended Abstracts   Vol. 2019.2 ( 0 ) page： 3476 - 3476   2019.9

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    Language：Japanese   Publisher：The Japan Society of Applied Physics  

    DOI： 10.11470/jsapmeeting.2019.2.0_3476

    CiNii Research

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