• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Unconventional high-temperature light-emission physics in non-equilibrium low-dimensional quantum system

Research Project

Project/Area Number 21K14486
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 28020:Nanostructural physics-related
Research InstitutionKyoto University

Principal Investigator

Nishihara Taishi  京都大学, エネルギー理工学研究所, 助教 (80768672)

Project Period (FY) 2021-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2022: ¥390,000 (Direct Cost: ¥300,000、Indirect Cost: ¥90,000)
Fiscal Year 2021: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Keywordsカーボンナノチューブ / 熱放射 / 励起子 / 低次元半導体 / 光物性 / 熱物性 / 非平衡フォノン系 / ナノ構造物質 / 熱光物性
Outline of Research at the Start

本研究は、革新的な高強度近赤外インコヒーレント光源の実現に向けて、従来型電流駆動熱発光の放射強度の限界を押し上げることが可能な、量子非平衡系の高温発光物理の解明を目指す。具体的には、研究代表者らがこれまで明らかにしてきた、理想的な1次元ナノ構造物質である単層カーボンナノチューブの熱放射に関する研究成果を発展させ、電流加熱した金属型ナノチューブの特殊な非平衡高温発光を単一チューブレベルで測定し、放射強度の増強に繋がる低次元量子非平衡系の高温発光の学理を見出す。

Outline of Final Research Achievements

We studied light emission phenomena of metallic carbon nanotubes in a specific high-temperature non-equilibrium state with the aim of establishing a scientific principle leading to higher intensity current-driven infrared light source such as conventional incandescent lamps. When one metallic nanotube was heated with a current, it showed higher-intensity near-infrared light than that in the thermal equilibrium state. This is because the current selectively excites optical phonons, resulting in a higher conversion efficiency from electrical energy to light and higher intensity compared to conventional Joule heating, in which all electrical energy is used for heat generation. This light emission can be understood as light with properties intermediate between thermal radiation and luminescence.

Academic Significance and Societal Importance of the Research Achievements

現在でも分析機器や製品加工におけるインコヒーレント赤外光源用途として、熱放射光源が積極的に利用されている。熱放射光の波長、帯域幅の自在制御の戦略は確立されつつあるが、放射強度に関しては、熱平衡系では原理的に超えられない黒体限界が存在する。本研究では、電流加熱した金属型カーボンナノチューブの高温の「非平衡」状態を利用すると、高強度、かつ波長がよく定まった近赤外光の発生が可能であることを実証した。もし、構造が揃った金属型ナノチューブで「豆電球」の様な構造を持つ光源を作製できれば、高強度な赤外光源が実現すると考えられ、社会の持続可能な発展に資する新たなエネルギー技術としての社会的な意義は大きい。

Report

(3 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • Research Products

    (10 results)

All 2022 2021

All Journal Article (2 results) (of which Peer Reviewed: 2 results,  Open Access: 2 results) Presentation (7 results) (of which Int'l Joint Research: 2 results,  Invited: 2 results) Patent(Industrial Property Rights) (1 results)

  • [Journal Article] Statistical Verification of Anomaly in Chiral Angle Distribution of Air-Suspended Carbon Nanotubes2022

    • Author(s)
      Nishihara Taishi、Takakura Akira、Matsui Keisuke、Itami Kenichiro、Miyauchi Yuhei
    • Journal Title

      Nano Letters

      Volume: 22 Issue: 14 Pages: 5818-5824

    • DOI

      10.1021/acs.nanolett.2c01473

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Empirical formulation of broadband complex refractive index spectra of single-chirality carbon nanotube assembly2022

    • Author(s)
      Nishihara Taishi、Takakura Akira、Shimasaki Masafumi、Matsuda Kazunari、Tanaka Takeshi、Kataura Hiromichi、Miyauchi Yuhei
    • Journal Title

      Nanophotonics

      Volume: 11 Issue: 5 Pages: 1011-1020

    • DOI

      10.1515/nanoph-2021-0728

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Comparison of Light Emission of Metallic Carbon Nanotubes under Laser- and Joule-Heating Conditions2022

    • Author(s)
      Taishi Nishihara, Akira Takakura, Yuhei Miyauchi
    • Organizer
      CLEO-PR2022
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Anomaly in the chiral angle distribution of air-suspended carbon nanotubes statistically verified using broadband Rayleigh spectroscopy2022

    • Author(s)
      Taishi Nishihara, Akira Takakura, Keisuke Matsui, Kenichiro Itami, Yuhei Miyauchi
    • Organizer
      第63回フラーレン・ナノチューブ・グラフェン総合シンポジウム
    • Related Report
      2022 Annual Research Report
  • [Presentation] Distinct thermo-optical properties of one-dimensional system enabled by exciton2022

    • Author(s)
      Taishi Nishihara
    • Organizer
      The 13th Asian Thermophysical Properties Conference (ATPC 2022)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 単一金属型カーボンナノチューブの熱放射と非平衡フォノン励起発光の比較2022

    • Author(s)
      西原大志, 高倉章, 宮内雄平
    • Organizer
      日本物理学会2023年春季大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 単一構造カーボンナノチューブ薄膜の複素屈折率スペクトル2021

    • Author(s)
      西原 大志 , 髙倉 章 , 島﨑 雅史 , 松田 一成 , 田中 丈士 , 片浦 弘道 , 宮内 雄平
    • Organizer
      第58回日本伝熱シンポジウム
    • Related Report
      2021 Research-status Report
  • [Presentation] Empirical modeling of broadband complex refractive index spectra of single-chirality-enriched carbon nanotube membranes2021

    • Author(s)
      Taishi Nishihara , Akira Takakura , Masafumi Shimasaki , Kazunari Matsuda , Takeshi Tanaka , Hiromichi Kataura , Yuhei Miyauchi
    • Organizer
      2021年第82回応用物理学会秋季学術講演会
    • Related Report
      2021 Research-status Report
  • [Presentation] Empirical modeling of broadband complex refractive index spectra of single-chirality carbon nanotube membranes for optical design2021

    • Author(s)
      Taishi Nishihara , Akira Takakura , Masafumi Shimasaki , Kazunari Matsuda , Takeshi Tanaka , Hiromichi Kataura , Yuhei Miyauchi
    • Organizer
      第62回フラーレン・ナノチューブ・グラフェン総合シンポジウム
    • Related Report
      2021 Research-status Report
  • [Patent(Industrial Property Rights)] 熱放射体、光スペクトル変換素子、及び光電変換装置2021

    • Inventor(s)
      宮内雄平 , 西原大志 , 高倉章 , 小鍋哲
    • Industrial Property Rights Holder
      宮内雄平 , 西原大志 , 高倉章 , 小鍋哲
    • Industrial Property Rights Type
      特許
    • Industrial Property Number
      2021-096124
    • Filing Date
      2021
    • Acquisition Date
      2021
    • Related Report
      2021 Research-status Report

URL: 

Published: 2021-04-28   Modified: 2024-01-30  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi