# Ultrathin Freestanding Photonic Nanomembrane Enabling Atomic-Level Control of Light Coupling

https://mdr.nims.go.jp/datasets/12d3ded8-240e-425f-b0e0-5b897108fa13

## File

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## Id

12d3ded8-240e-425f-b0e0-5b897108fa13

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2026-05-11T03:11:32.680453Z

## Updated at

2026-05-12T00:25:49.639320Z

## Published at

2026-05-12T03:26:57.328641Z

## Doi

https://doi.org/10.48505/nims.6280

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## Resource type

conference_presentation

## Manuscript type

authors_original

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## Title

- title: Ultrathin Freestanding Photonic Nanomembrane Enabling Atomic-Level Control
    of Light Coupling
  title_type: original
  lang: en

## Description

- description: "As promising candidates for next-generation quantum and semiconductor
    technologies, atomic-layer and two-dimensional (2D) materials offer unique opportunities
    for manipulating light–matter interactions at the atomic level. However, their
    ultrathin nature confines the available interaction volume, posing inherent limitations
    to efficient optical coupling and integration with nanophotonic architectures.\r\nTo
    achieve atomic-level control over light coupling, an ultrathin freestanding photonic
    nanomembrane is developed, serving as a versatile platform for integrating atomic-layer
    and 2D materials. Freestanding nanomembranes, characterized by their extreme thinness
    and absence of substrates, exhibit excellent optical transparency, high-Q resonance
    capability, and broad material compatibility. This suspended configuration maximizes
    light–matter interactions through localized surface fields and ensures dimensional
    compatibility with atomic-layer materials. Through atomic-layer deposition (ALD)
    of dielectric material, we demonstrate atomic-scale thickness modulation, where
    a single ALD cycle induces a Å-level redshift of the high-Q resonance. \r\nBuilding
    on this atomically controllable nanomembrane platform, we integrate transition
    metal dichalcogenide (TMD) monolayers such as WS2, WSe2, and MoS2, which possess
    strong excitonic resonances, direct bandgaps, and pronounced nonlinear optical
    responses. The freestanding photonic nanomembrane supports quasi-bound states
    in the continuum (quasi-BICs) that suppress radiative losses while confining light
    tightly within the monolayer region, leading to enhanced light–matter interactions.
    This strong coupling gives rise to quasi-BIC–mediated exciton–polariton formation,
    accompanied by pronounced enhancement in photoluminescence (PL) and second-harmonic
    generation (SHG) with excellent spatial uniformity across a large area. "
  description_type: abstract
  lang: eng

## Creator

- name: Ya-Lun Ho
  role: author
  orcid: https://orcid.org/0000-0001-8274-5978
  organization: National Institute for Materials Science
  department: Research Center for Electronic and Optical Materials/Optical Materials
    Field/Nanophotonics Group

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## Keyword

- subject: Membrane
  schema: not_defined
- subject: TMDC
  schema: not_defined
- subject: Bound states in the continuum
  schema: not_defined
- subject: Ultrathin
  schema: not_defined
- subject: Perovskite nanocrystal
  schema: not_defined

## Rights

- identifier: http://rightsstatements.org/vocab/InC/1.0/

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## Data origin

- data_origin_type: other

## Embargo



## Journal



## Conference

name: 2026 MRS Spring Meeting & Exhibit
start_date: 2026-04-26
end_date: 2026-05-01
identifier: https://www.mrs.org/meetings-events/annual-meetings/2026-mrs-spring-meeting-exhibit

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## Fileset

- id: ca60c8b1-def5-4849-a76c-d5a2c6bb2433
  filename: Ultrathin Freestanding Photonic Nanomembrane Enabling Atomic-Level Control
    of Light Coupling.docx
  content_type: application/vnd.openxmlformats-officedocument.wordprocessingml.document
  size: 16289
  md5: 327f1ed21aa2049561ea5730c8f8b67d

## Thumbnail

fileset_id: ca60c8b1-def5-4849-a76c-d5a2c6bb2433
filename: Ultrathin Freestanding Photonic Nanomembrane Enabling Atomic-Level Control
  of Light Coupling.docx