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Evanescent wave generation and control by metasurfaces

Research Project

Project/Area Number 17K18880
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Research Field Electrical and electronic engineering and related fields
Research InstitutionOsaka University

Principal Investigator

Sanada Atsushi  大阪大学, 基礎工学研究科, 教授 (20264905)

Project Period (FY) 2017-06-30 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Fiscal Year 2018: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2017: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Keywordsメタマテリアル / メタ表面 / エバネセント波 / 回折限界 / サブ波長解像
Outline of Final Research Achievements

In this research, the design theory for artificial structured surfaces (metasurfaces) with evanescent wave generation and manipulation functionalities for wideband subwavelength focusing operations exceeding the diffraction limit. It is found that the free space impedance, which is generally considered to be a real quantity, possesses an imaginary part when generating evanescent waves. It is experimentally shown that a two-spot subwavelength focusing exceeding diffraction limit less than one tenth of the wavelength is realized at 2.45 GHz with the doubled relative operation bandwidth of 8% compared with that of a conventional metasurface.

Academic Significance and Societal Importance of the Research Achievements

本研究は、原理的には体積を持たず、実効的な媒質定数が定義できないメタ表面に対して、これまで考えられていなかったエバネセント波の発生と操作のための合理的な設計指針を与えるもので、その学術的意義は大きい。また、本研究により判明した、通常実数と考えられている自由空間インピーダンスが、エバネセント波の生成時には虚部を持つことも重要な発見である。本研究成果は、高分解能非侵襲生体センサー等の電磁波応用から光学応用等、幅広い分野への展開が期待でき、社会的な波及効果も大きい。

Report

(3 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • Research Products

    (9 results)

All 2019 2018 2017 Other

All Presentation (8 results) (of which Int'l Joint Research: 2 results,  Invited: 8 results) Remarks (1 results)

  • [Presentation] メタ表面入門2019

    • Author(s)
      真田篤志
    • Organizer
      第9回電磁メタマテリアル講演会
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] メタマテリアル設計のためのシミュレーション技術2018

    • Author(s)
      真田篤志
    • Organizer
      2018 Microwave Workshop and Exhibition
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] メタマテリアルのシミュレーション技法2018

    • Author(s)
      真田篤志
    • Organizer
      電子情報通信学会2018年ソサイエティ大会
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] Evanescent Wave Generation and Subwavelength Focusing by a Multilayer Metasureface2018

    • Author(s)
      Atsushi Sanada, Katsuhiro Ishii, Yuto Kato, Yuki Okumura
    • Organizer
      A3 Metamaterial Forum
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] メタマテリアル技術が拓く電磁波応用の最新動向2018

    • Author(s)
      真田篤志
    • Organizer
      IEEE MTT-S 2018 Kansai Chapter Workshop
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] メタマテリアルによる電磁波伝搬制御2018

    • Author(s)
      真田篤志
    • Organizer
      第8回電磁メタマテリアル講演会
    • Related Report
      2017 Research-status Report
    • Invited
  • [Presentation] Evanescent Wave Generation for Sub-Wavelength Focusing with a Trilayer Metasurface2017

    • Author(s)
      Atsushi Sanada, Katsuhiro Ishii
    • Organizer
      Japan-Russia Joint International Microwave Workshop 2017
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] メタマテリアルの最新動向2017

    • Author(s)
      真田篤志
    • Organizer
      2017 Microwave Workshop and Exhibition
    • Related Report
      2017 Research-status Report
    • Invited
  • [Remarks] Sanada Laboratory

    • URL

      http://www.ec.ee.es.osaka-u.ac.jp

    • Related Report
      2018 Annual Research Report

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Published: 2017-07-21   Modified: 2020-03-30  

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