# Large‐Area Photonic Membranes Achieving Uniform and Strong Enhancement of Photoluminescence and Second‐Harmonic Generation in Monolayer WSe                    <sub>2</sub>

https://mdr.nims.go.jp/datasets/9668dab5-3d83-49e0-af6f-c5ee443a7a45

## File

- [2508.01118v2.pdf](https://mdr.nims.go.jp/filesets/cfd5a933-e70f-4591-9910-e4db7a0a51d8/download) ([Detail](https://mdr.nims.go.jp/filesets/cfd5a933-e70f-4591-9910-e4db7a0a51d8.md))

## Id

9668dab5-3d83-49e0-af6f-c5ee443a7a45

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2026-03-18T06:02:07.759141Z

## Updated at

2026-03-18T07:23:07.575457Z

## Published at

2026-03-21T04:26:21.228455Z

## Doi

https://doi.org/10.48505/nims.6225

## First published url

https://doi.org/10.1002/smtd.202501693

## Date published

2026-02-02

## Recorded date published

2026-2

## Resource type

journal_article

## Manuscript type

authors_original

## Collection



## Title

- title: Large‐Area Photonic Membranes Achieving Uniform and Strong Enhancement of
    Photoluminescence and Second‐Harmonic Generation in Monolayer WSe                    <sub>2</sub>
  title_type: original
  lang: en

## Description

- description: Two-dimensional (2D) transition metal dichalcogenides exhibit strong
    excitonic responses, direct bandgaps, and remarkable nonlinear optical properties,
    making them highly attractive for integrated photonic, optoelectronic, and quantum
    applications. Here, we present a large-area freestanding membrane photonic platform
    that achieves exceptional enhancement of light–matter interactions in monolayer
    WSe2 via quasi-bound states in the continuum (quasi-BICs). The freestanding architecture
    effectively suppresses radiative losses and supports high-Q optical resonances,
    leading to enhanced light–matter interactions. This results in significant photoluminescence
    emission and second-harmonic generation (SHG) enhancement factors of 1158 and
    378, respectively, with spatial uniformity sustained across a 450 × 450 µm 2 area.
    This uniform SHG enhancement further enables polarization-resolved mapping of
    crystal orientation and grain boundaries, offering a practical method for large-area
    structural characterization of 2D materials. Moreover, femtosecond-pumped SHG
    spectra reveal multiple narrowband peaks originating from distinct quasi-BIC modes—providing
    direct spectral evidence of resonantly enhanced nonlinear coupling. The combined
    attributes of strong optical enhancement, spectral selectivity, and wafer-scale
    compatibility establish this platform as a scalable interface for 2D semiconductor
    integration in next-generation optoelectronic, nonlinear, and quantum photonic
    technologies.
  description_type: abstract
  lang: und

## Creator

- name: Fong‐Liang Hsieh
  role: author
- name: Chih‐Zong Deng
  role: author
  orcid: https://orcid.org/0009-0005-2398-5353
- name: Shao‐Ku Huang
  role: author
  orcid: https://orcid.org/0009-0000-1231-1461
- name: Tsung‐Hsin Liu
  role: author
- name: Mu‐Hsin Chen
  role: author
- name: Chun‐Hao Chiang
  role: author
  orcid: https://orcid.org/0000-0002-9066-4657
- name: Che‐Lun Lee
  role: author
- name: Man‐Hong Lai
  role: author
- name: Jui‐Han Fu
  role: author
- name: Vincent Tung
  role: author
  orcid: https://orcid.org/0000-0003-3230-0932
- name: Yu‐Ming Chang
  role: author
  orcid: https://orcid.org/0000-0002-8947-5031
- name: Chun‐Wei Chen
  role: author
  orcid: https://orcid.org/0000-0003-3096-249X
- name: Ya‐Lun Ho
  role: author
  orcid: https://orcid.org/0000-0001-8274-5978

## Contact agent



## Publisher

organization: Wiley

## Managing organization



## Keyword

- subject: bound states in the continuum
  schema: not_defined
- subject: PL enhancement
  schema: not_defined
- subject: second-harmonic generation
  schema: not_defined
- subject: transition metal dichalcogenides
  schema: not_defined
- subject: WSe2
  schema: not_defined
- subject: membrane
  schema: not_defined

## Rights

- description: 'This is the pre-peer reviewed version of the following article: F.-L.Hsieh,
    C.-Z.Deng, S.-K.Huang, et al. “Large-Area Photonic Membranes Achieving Uniform
    and Strong Enhancement of Photoluminescence and Second-Harmonic Generation in
    Monolayer WSe2.” Small Methods10, no. 4 (2026): e01693, which has been published
    in final form at https://doi.org/10.1002/smtd.202501693. This article may be used
    for non-commercial purposes in accordance with Wiley Terms and Conditions for
    Use of Self-Archived Versions.'
  identifier: http://rightsstatements.org/vocab/InC/1.0/

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo



## Journal

- title: Small Methods
  issn: '23669608'
  volume: '10'
  issue: '4'
  article_number: e01693

## Conference



## Related item



## Funding

- identifier: JP23K26155
  funder_name: Japan Society for the Promotion of Science
- identifier: JP25KF0083
  funder_name: Japan Society for the Promotion of Science
- identifier: 114‐2112‐M‐002‐032‐MY3
  funder_name: National Science and Technology Council
- identifier: 113‐2124‐M‐002‐007‐
  funder_name: National Science and Technology Council

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## Fileset

- id: cfd5a933-e70f-4591-9910-e4db7a0a51d8
  filename: 2508.01118v2.pdf
  content_type: application/pdf
  size: 1585444
  md5: 1a6186eb04f94e8bdb8bb7e1df272dad

## Thumbnail

fileset_id: cfd5a933-e70f-4591-9910-e4db7a0a51d8
filename: 2508.01118v2.pdf