Yamada, Junpei

写真a

Affiliation

Graduate School of Science and Technology ( Yagami )

Position

Assistant Professor (Non-tenured)/Research Associate (Non-tenured)/Instructor (Non-tenured)

External Links
Scopus Paper Info  
Paper Count: 13 Citation Count: 60 h-index: 5

Click to view the Scopus page. The data was downloaded from Scopus API in November 01, 2026, via http://api.elsevier.com and http://www.scopus.com .

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Career 【 Display / hide 】

  • 2017.04
    -
    2020.03

    名城大学, 理工学部, 特任助手

  • 2020.05
    -
    2023.03

    上智大学, ナノテクノロジーセンター, 特別研究員

  • 2023.04
    -
    2025.03

    慶應義塾大学, 理工学研究科, 特任助教

  • 2025.04
    -
    Present

    Keio University, Graduate School of Science and Technology, 助教（有期）

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Academic Degrees 【 Display / hide 】

  • 博士（工学）, Meijo University, Coursework, 2020.03

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Research Areas 【 Display / hide 】

  • Manufacturing Technology (Mechanical Engineering, Electrical and Electronic Engineering, Chemical Engineering) / Electric and electronic materials

  • Nanotechnology/Materials / Nanomaterials

  • Nanotechnology/Materials / Crystal engineering

  • Nanotechnology/Materials / Optical engineering and photon science

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Research Keywords 【 Display / hide 】

  • グラフェン

  • ナノカーボン

  • 光デバイス

  • GaN

  • 窒化物半導体

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Papers 【 Display / hide 】

  • Defect-engineered graphene infrared emitting devices with enhanced stability and low power consumption

    Yui Shimura, Jumpei Yamada, Hideyuki Maki

    Photonics and Nanostructures - Fundamentals and Applications (Elsevier BV)  72 2026.09

    Lead author, Corresponding author,  ISSN  1569-4410

  • Significant red-emission enhancement using column-top-exposed InGaN-based nanocolumn plasmonic crystals with honeycomb lattice

    Kyohei Koseki, Hiroto Otsuka, Ryoma Shirotori, Jumpei Yamada, Koichi Okamoto, Rie Togashi, Katsumi Kishino, Takao Oto

    Applied Physics Letters  2026.06

    Lead author, Corresponding author

  • Red emission enhancement via strong coupling between photonic–plasmonic band states in InGaN/GaN honeycomb nanocolumn plasmonic crystals

    Hiroto Otsuka, Ryoma Shirotori, Shotaro Hayakawa, Jumpei Yamada, Koichi Okamoto, Rie Togashi, Katsumi Kishino, Takao Oto

    Applied Physics Letters  2026.04

    Lead author, Corresponding author,  ISSN  0003-6951

    　View Summary

    <jats:p>InGaN-based light-emitting diodes (LEDs) exhibit excellent emission efficiency in the blue spectral region but experience severe degradation of external quantum efficiency in the red region, primarily due to lattice strain and increased defect density. To address this limitation, we introduced surface plasmon polaritons into InGaN/GaN nanocolumn (NC) arrays arranged in a honeycomb lattice to enhance red-light emission. Deposition of Ag films on the photonic crystal NCs generated plasmonic crystals that allowed precise control of photonic–plasmonic band interactions. Angle-resolved photoluminescence measurements combined with electromagnetic field analysis revealed that strong coupling occurs when photonic and plasmonic field modes are spectrally and spatially matched. Rabi splitting was observed due to the strong coupling between photonic and plasmonic band states, and a 9.6-fold enhancement in red emission was achieved through the combined effects of strong and weak coupling. This controllable strong coupling between photonic and plasmonic band states provides a promising approach for overcoming the intrinsic efficiency limitations of InGaN-based red LEDs while simultaneously enhancing their optical functionality.</jats:p>

  • Thermal light emitters based on graphene directly grown on chips by etching-precipitation method

    Yui Shimura, Shinichiro Matano, Jumpei Yamada, Suguru Noda, Hideyuki Maki

    Photonics and Nanostructures - Fundamentals and Applications (Elsevier BV)  65   101400 - 101400 2025.07

    ISSN  1569-4410

  • Improving the luminous efficiency of red nanocolumn μ-LEDs by reducing electrode size to ϕ2.2 μm

    Katsumi Kishino, Ai Mizuno, Tatsuya Honda, Jumpei Yamada, Rie Togashi

    Applied Physics Express (IOP Publishing)  17 ( 1 ) 014004 - 014004 2023.12

    ISSN  1882-0778

    　View Summary

    Abstract

    A red InGaN-based nanocolumn micro μLED with an emission diameter of ϕ2.2 μm was demonstrated to achieve an on-wafer external quantum efficiency (EQE) of 2.1% at the peak wavelength of 615 nm. The LED was fabricated by repeating the electrode process on the same nanocolumn pattern area and reducing the emission diameter from ϕ80 to ϕ2.2 μm. The peak EQE, which was maximized at ∼25 A cm<sup>−2</sup>, increased by decreasing the emission diameter from 1.2% to 2.1%. This behavior, which differs from that of InGaN-film LEDs, is characterized as a unit of independent nano-LEDs with passivated sidewalls of nanocolumn LEDs.

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Reviews, Commentaries, etc. 【 Display / hide 】

  • ナノカーボン熱発光デバイス開発と赤外分析応用

    山田純平, 牧英之

    検査技術 31 ( 7 ) 8 - 14 2026.07

  • 様々な結晶面を利用したInGaN系ナノコラム結晶の成長と発光デバイス応用

    山田純平, 水野愛, 富樫理恵, 野村一郎, 岸野克巳

    電子情報通信学会技術研究報告(IEICE Technical Report) 122 ( 273 ) 99 - 102 2022

  • 同芯型多段構造をもつグラフェン被覆銅線作製のための電解メッキ薄膜化について

    藤原 亨介, 伊藤 幹人, 上田 悠貴, 山田 純平, 成塚 重弥, 丸山 隆浩

    名城大学総合研究所紀要  ( 24 ) 29 - 32 2019

  • 減圧窒素マイクロプラズマ処理における処理圧力とプラズマ到達距離との関係

    杉山 隼大, 日下部 安宏, 竹中 駿, 上田 悠貴, 山田 純平, 丸山 隆浩, 成塚 重弥

    名城大学総合研究所紀要  ( 23 ) 45 - 48 2018

  • グラフェン析出成長法における酸化アルミニウムバリア層を用いた核発生制御

    成塚重弥, 山田純平, 上田悠貴, 丸山隆浩

    名城大学総合研究所紀要  ( 22 ) 41 - 44 2017

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Intellectual Property Rights, etc. 【 Display / hide 】

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Awards 【 Display / hide 】

  • JSAP Poster Award

    山田 純平, 2023.05, 第70回応用物理学会春季学術講演会

  • 発表奨励賞

    山田 純平, 2021.12, 第13回ナノ構造・エピタキシャル成長講演会

  • 学長表彰

    山田 純平, 2020.03, 名城大学

  • Poster Award

    Jumpei Yamada, 2019.08, 19th International Conference on Crystal Growth and Epitaxy

  • 若手ポスター賞

    山田純平, 2015.09, 第39回 結晶成長討論会

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Courses Taught 【 Display / hide 】

  • SEMICONDUCTOR ENGINEERING

    2026

  • SEMICONDUCTOR ENGINEERING

    2025

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