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Biomolecular sensing in all-dielectric metasurfaces with collective resonances

Research Project

Project/Area Number 22K20496
Research Category

Grant-in-Aid for Research Activity Start-up

Allocation TypeMulti-year Fund
Review Section 0402:Nano/micro science, applied condensed matter physics, applied physics and engineering, and related fields
Research InstitutionNational Institute for Materials Science

Principal Investigator

WATANABE Keisuke  国立研究開発法人物質・材料研究機構, 若手国際研究センター, ICYSリサーチフェロー (90945362)

Project Period (FY) 2022-08-31 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2023: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2022: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywordsメタサーフェス / BIC / シリコン / バイオセンサ / 強結合 / 赤外分光 / ナノギャップ / ナノ構造
Outline of Research at the Start

金属を使わない高屈折率な誘電体を用いた全誘電体メタサーフェスは、吸収ロスが小さくMie共鳴に基づくシャープなスペクトルを利用できるため、センシング用途として有望である。本研究では、ナノ構造の周期性に起因する共鳴効果として特にBound state in the continuum (BIC) と呼ばれる光の局在状態に着目する。このようなメタサーフェスは、構造的にもスペクトル的にも設計自由度が大きく、高感度な生体分子センシング、赤外分光を実現できると期待される。

Outline of Final Research Achievements

All-dielectric nanostructures composed of high refractive index materials have attracted significant attention as a new strategy for highly sensitive sensing devices relying on their sharp spectra because they have lower material absorption losses than conventional metal nanostructures. In this study, we have demonstrated highly sensitive molecular sensing using a collective response at a singularity, called bound state in the continuum (BIC), in a dielectric array. Moreover, we investigated the coupling properties between BIC resonance modes and molecular vibrations in the mid-infrared regime, opening a route toward realizing highly sensitive surface-enhanced infrared spectroscopy without the use of metals.

Academic Significance and Societal Importance of the Research Achievements

本研究により、BICの原理を用いた誘電体メタサーフェスが光と物質の相互作用の増大に大きく寄与することが示され、高感度な生体分子の検出や分析デバイスの新たな基盤技術となりうることを示した。シリコンナノ構造は、金属ナノ構造に比べ材料コストが安く、高精度な既存のCMOSプロセスを用いた大量生産が可能であり、実用センシングデバイスへのメリットも大きい。

Report

(3 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • Research Products

    (7 results)

All 2024 2023 2022

All Journal Article (3 results) (of which Peer Reviewed: 3 results,  Open Access: 2 results) Presentation (4 results) (of which Int'l Joint Research: 1 results)

  • [Journal Article] Optimum asymmetry for nanofabricated refractometric sensors at quasi-bound states in the continuum2024

    • Author(s)
      Watanabe Keisuke、Iwanaga Masanobu
    • Journal Title

      Applied Physics Letters

      Volume: 124 Issue: 11 Pages: 111705-111705

    • DOI

      10.1063/5.0158793

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Vibrational Coupling to Quasi‐Bound States in the Continuum under Tailored Coupling Conditions2023

    • Author(s)
      Watanabe Keisuke、Devi Hemam Rachna、Iwanaga Masanobu、Nagao Tadaaki
    • Journal Title

      Advanced Optical Materials

      Volume: 12 Issue: 6 Pages: 2301912-2301912

    • DOI

      10.1002/adom.202301912

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Nanogap enhancement of the refractometric sensitivity at quasi-bound states in the continuum in all-dielectric metasurfaces2023

    • Author(s)
      Watanabe Keisuke、Iwanaga Masanobu
    • Journal Title

      Nanophotonics

      Volume: 12 Issue: 1 Pages: 99-109

    • DOI

      10.1515/nanoph-2022-0565

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Tailoring coupling conditions between silicon metasurfaces and molecular vibrations2023

    • Author(s)
      Watanabe Keisuke, Devi Hemam Rachna, Iwanaga Masanobu, Nagao Tadaaki
    • Organizer
      META 2023, the 13th International Conference on Metamaterials, Photonic Crystals and Plasmonics
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] シリコンメタサーフェスを用いた準BIC-分子振動結合系の結合条件制御2023

    • Author(s)
      渡邊 敬介、ヘマム ラチナ デヴィ、岩長 祐伸、長尾 忠昭
    • Organizer
      第84回応用物理学会秋季学術講演会
    • Related Report
      2023 Annual Research Report
  • [Presentation] メタサーフェスの光センサーへの展開2023

    • Author(s)
      岩長 祐伸, 渡邊 敬介
    • Organizer
      第70回応用物理学会春季学術講演会
    • Related Report
      2022 Research-status Report
  • [Presentation] ナノギャップを有するメタサーフェスの準BIC磁気双極子モード観測2022

    • Author(s)
      渡邊 敬介, 岩長 祐伸
    • Organizer
      第83回応用物理学会秋季学術講演会
    • Related Report
      2022 Research-status Report

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Published: 2022-09-01   Modified: 2025-01-30  

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