# Vibrational Coupling to Quasi‐Bound States in the Continuum under Tailored Coupling Conditions

https://mdr.nims.go.jp/datasets/6dea684a-cb2a-4d0f-a6fc-7cef9b37dbc2

## File

- [Advanced Optical Materials - 2023 - Watanabe - Vibrational Coupling to Quasi‐Bound States in the Continuum under Tailored.pdf](https://mdr.nims.go.jp/filesets/ab38d911-817f-4021-8e51-0885cf1cbe10/download) ([Detail](https://mdr.nims.go.jp/filesets/ab38d911-817f-4021-8e51-0885cf1cbe10.md))
- [adom202301912-sup-0001-suppmat.pdf](https://mdr.nims.go.jp/filesets/c194b67a-0bea-4224-9e12-61f1ed0e8a85/download) ([Detail](https://mdr.nims.go.jp/filesets/c194b67a-0bea-4224-9e12-61f1ed0e8a85.md))

## Id

6dea684a-cb2a-4d0f-a6fc-7cef9b37dbc2

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2024-04-03T02:49:07.189456Z

## Updated at

2024-04-03T23:30:24.535608Z

## Published at

2024-04-03T23:30:24.625736Z

## Doi



## First published url

https://doi.org/10.1002/adom.202301912

## Date published

2023-10-27

## Recorded date published

2024-2

## Resource type

journal_article

## Manuscript type

vor

## Collection



## Title

- title: Vibrational Coupling to Quasi‐Bound States in the Continuum under Tailored
    Coupling Conditions
  title_type: original
  lang: en

## Description

- description: Photonic resonance modes can be spectrally coupled to the vibrational
    modes of molecules in the mid-infrared regime through interactions between localized
    electric fields and nearby molecules. According to recent studies, radiative loss
    engineering of coupled systems is a promising approach for tailoring coupling
    conditions and enhancing the molecular signals. However, this strategy has only
    been realized using the localized surface plasmon resonances of metal nanostructures,
    which suffer from increased ohmic loss in the mid-infrared region and face serious
    limitations in achieving high quality (Q) factors. In this study, we adopt silicon-based
    metasurfaces formed on silicon-on-insulator wafers to achieve high Q factors and
    tune the coupling conditions between the quasi-bound states in the continuum (qBICs)
    and molecular vibrations. The coupling between the resonance mode and polymethyl
    methacrylate molecules is tailored from weak to strong coupling regimes by simply
    changing the structural asymmetry parameter and utilizing the intrinsically high
    Q factors of the qBIC modes. In addition, we identify the optimal asymmetry parameter
    that maximizes the enhanced molecular signal, opening a route toward realizing
    highly sensitive surface-enhanced infrared spectroscopy using complementary metal-oxide
    semiconductor compatible all-dielectric materials.
  description_type: abstract
  lang: und

## Creator

- name: Keisuke Watanabe
  role: author
  orcid: https://orcid.org/0000-0002-4285-2135
  organization: National Institute for Materials Science
- name: Hemam Rachna Devi
  role: author
  orcid: https://orcid.org/0000-0002-9667-2690
- name: Masanobu Iwanaga
  role: author
  orcid: https://orcid.org/0000-0002-8930-6940
  organization: National Institute for Materials Science
- name: Tadaaki Nagao
  role: author
  orcid: https://orcid.org/0000-0002-6746-2686
  organization: National Institute for Materials Science

## Contact agent



## Publisher

organization: Wiley

## Managing organization



## Keyword

- subject: BIC
  schema: not_defined
- subject: metasurfaces
  schema: not_defined
- subject: SEIRA
  schema: not_defined
- subject: spectroscopy
  schema: not_defined
- subject: strong coupling
  schema: not_defined

## Rights

- identifier: https://creativecommons.org/licenses/by/4.0/

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo



## Journal

- title: Advanced Optical Materials
  issn: '21951071'
  volume: '12'
  issue: '6'
  article_number: '2301912'

## Conference



## Related item



## Funding

- identifier: JP22K20496
  funder_name: Japan Society for the Promotion of Science

## Instrument



## Instrument operator



## Instrument managing organization



## Measurement method



## Specimen



## Chemical composition



## Structure for specimen



## Structural feature for specimen



## Specific property for specimen



## Process for specimen treatment



## Computational method



## Energy level/transition state



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## Custom property



## Fileset

- id: ab38d911-817f-4021-8e51-0885cf1cbe10
  filename: Advanced Optical Materials - 2023 - Watanabe - Vibrational Coupling to
    Quasi‐Bound States in the Continuum under Tailored.pdf
  content_type: application/pdf
  size: 2416854
  md5: c6915b96ed31768c3b4c15cd78ec04fc
- id: c194b67a-0bea-4224-9e12-61f1ed0e8a85
  filename: adom202301912-sup-0001-suppmat.pdf
  content_type: application/pdf
  size: 1465421
  md5: 23267ac4d27efdae2a770dc00bd493c5

## Thumbnail

fileset_id: ab38d911-817f-4021-8e51-0885cf1cbe10
filename: Advanced Optical Materials - 2023 - Watanabe - Vibrational Coupling to Quasi‐Bound
  States in the Continuum under Tailored.pdf