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Controlling the directionality of spontaneous emissions via the evanescent wave coupling effect in a fine truncated-cone structure

Research Project

Project/Area Number 24246011
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section一般
Research Field Applied materials science/Crystal engineering
Research InstitutionNational Institute of Advanced Industrial Science and Technology

Principal Investigator

WANG Xuelun  独立行政法人産業技術総合研究所, 電子光技術研究部門, 研究グループ長 (80356609)

Co-Investigator(Kenkyū-buntansha) AMANO Takeru  国立研究開発法人産業技術総合研究所, 電子光技術研究部門, 主任研究員 (10392581)
IMAMURA Hiroshi  国立研究開発法人産業技術総合研究所, スピントロニクス研究センター, 研究チーム長 (30323091)
小倉 睦郎  独立行政法人産業技術総合研究所, ナノシステム研究部門, 主任研究員 (90356717)
Project Period (FY) 2012-05-31 – 2015-03-31
Project Status Completed (Fiscal Year 2014)
Budget Amount *help
¥41,990,000 (Direct Cost: ¥32,300,000、Indirect Cost: ¥9,690,000)
Fiscal Year 2014: ¥8,970,000 (Direct Cost: ¥6,900,000、Indirect Cost: ¥2,070,000)
Fiscal Year 2013: ¥13,260,000 (Direct Cost: ¥10,200,000、Indirect Cost: ¥3,060,000)
Fiscal Year 2012: ¥19,760,000 (Direct Cost: ¥15,200,000、Indirect Cost: ¥4,560,000)
Keywords指向性 / 発光ダイオード / エバネッセント光 / 結合 / リッジ構造 / 錐台構造 / リッジ / 円錐台 / 半導体物性 / 光物性 / 先端機能デバイス
Outline of Final Research Achievements

Spontaneous light sources with a well-defined spatial directionality are strongly desired in various applications. Despite the extensive studies devoted to controlling the radiation process of spontaneous emissions, there still lacks a reliable method which can provide a high directionality suitable for widespread applications, especially in terms of the stability of the directionality against variations in device operating conditions. In this work, we proposed a novel approach of controlling the directionality of spontaneous emissions which employs the evanescent wave coupling effect in a subwavelength-sized ridge or truncated cone structure. Strong directionalities characterized by a half-intensity angle of 43 degree are demonstrated for the first time by using a an InGaAs/GaAs light-emitting diode with fine ridges formed on its light-extraction surface. The directionality is found to be almost independent of operating conditions over a wide range of operating condition variations.

Report

(4 results)
  • 2014 Annual Research Report   Final Research Report ( PDF )
  • 2013 Annual Research Report
  • 2012 Annual Research Report
  • Research Products

    (7 results)

All 2014 2013 Other

All Journal Article (1 results) (of which Acknowledgement Compliant: 1 results) Presentation (5 results) (of which Invited: 3 results) Patent(Industrial Property Rights) (1 results)

  • [Journal Article] 微小リッジ・錐台構造におけるエバネッセント光の結合効果によるLEDの高効率化と指向性制御2014

    • Author(s)
      王学論、Hao Guo-dong、戸田直也
    • Journal Title

      電気学会研究会資料

      Volume: OQD-14 Pages: 17-21

    • Related Report
      2014 Annual Research Report
    • Acknowledgement Compliant
  • [Presentation] エバネッセント光の結合効果によるLEDの高効率化と指向性制御2014

    • Author(s)
      王学論、Hao Guo-dong、戸田直也
    • Organizer
      電気学会 光・量子デバイス研究会
    • Place of Presentation
      東京工業大学
    • Year and Date
      2014-06-30
    • Related Report
      2014 Annual Research Report
    • Invited
  • [Presentation] Controlling the directionality of spontaneous emission via a novel evanescent-to-propagating light transformation effect in a small ridge/truncated-cone structure2014

    • Author(s)
      王学論
    • Organizer
      2014 Collaborative Conference on Crystal Growth
    • Place of Presentation
      Phuket, Thailand
    • Related Report
      2013 Annual Research Report
    • Invited
  • [Presentation] 微小リッジ構造による自然放出光の指向性制御:PLによる観測

    • Author(s)
      王学論、戸田直也、Hao Guo-Dong
    • Organizer
      第61回応用物理学会春季学術講演会
    • Place of Presentation
      青山学院大学
    • Related Report
      2013 Annual Research Report
  • [Presentation] Controlling the Directionality of Spontaneous Emission via a Small Ridge Structure

    • Author(s)
      王学論、戸田直也、Hao Guo-Dong
    • Organizer
      the 41th International Symposium on Compound Semiconductor
    • Place of Presentation
      Montpellier, France
    • Related Report
      2013 Annual Research Report
  • [Presentation] A Novel Evanescent-to-Propagating Light Transformation Effect in Sub-Wavelength-Sized Ridge Structures and its Application to Light-Emitting Diodes

    • Author(s)
      王学論
    • Organizer
      2012 Collaborative Conference on Crystal Growth
    • Place of Presentation
      Orlando, USA
    • Related Report
      2012 Annual Research Report
    • Invited
  • [Patent(Industrial Property Rights)] 発光ダイオード2013

    • Inventor(s)
      王学論
    • Industrial Property Rights Holder
      王学論
    • Industrial Property Rights Type
      特許
    • Filing Date
      2013-03-12
    • Related Report
      2012 Annual Research Report

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Published: 2012-11-27   Modified: 2019-07-29  

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