# Nanosecond Ferroelectric Switching of Intralayer Excitons in Bilayer <math display="inline">  <mrow>    <mn>3</mn>    <mi>R</mi>    <mtext>−</mtext>    <msub>      <mrow>        <mi>MoS</mi>      </mrow>      <mrow>        <mn>2</mn>      </mrow>    </msub>  </mrow></math> through Coulomb Engineering

https://mdr.nims.go.jp/datasets/67fc60e7-ad8c-4c77-831d-b5402b0d8e41

## File

- [PhysRevX.15.021081.pdf](https://mdr.nims.go.jp/filesets/5e6bf592-9a2e-40ff-8295-ce188e533845/download) ([Detail](https://mdr.nims.go.jp/filesets/5e6bf592-9a2e-40ff-8295-ce188e533845.md))

## Id

67fc60e7-ad8c-4c77-831d-b5402b0d8e41

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2026-04-03T02:24:04.193356Z

## Updated at

2026-04-03T05:58:57.069454Z

## Published at

2026-04-03T07:27:42.359410Z

## Doi



## First published url

https://doi.org/10.1103/physrevx.15.021081

## Date published

2025-06-04

## Recorded date published

2025-6

## Resource type

journal_article

## Manuscript type

vor

## Collection



## Title

- title: Nanosecond Ferroelectric Switching of Intralayer Excitons in Bilayer <mml:math
    xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mn>3</mml:mn><mml:mi
    mathvariant="normal">R</mml:mi><mml:mtext>−</mml:mtext><mml:msub><mml:mrow><mml:mi>MoS</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>
    through Coulomb Engineering
  title_type: original
  lang: en

## Description

- description: High-speed, nonvolatile tunability is critical for advancing reconfigurable
    photonic devices used in neuromorphic information processing, sensing, and communication.
    Despite significant progress in developing phase-change and ferroelectric materials,
    achieving highly efficient, reversible, rapid switching of optical properties
    has remained a challenge. Recently, sliding ferroelectricity has been discovered
    in 2D semiconductors, which also host strong excitonic effects. Here, we demonstrate
    that these materials enable nanosecond ferroelectric switching in the complex
    refractive index, substantially modulating their linear optical responses. The
    maximum index modulation reaches about 4, resulting in a relative reflectance
    change exceeding 85%. Both on and off switching occur within 2.5 ns, with switching
    energy at femtojoule levels. The switching mechanism is driven by tuning the excitonic
    peak splitting of a rhombohedral molybdenum disulfide bilayer in an engineered
    Coulomb screening environment. This new switching mechanism establishes a new
    direction for developing high-speed, nonvolatile optical memories and highly efficient,
    compact reconfigurable photonic devices. Additionally, the demonstrated imaging
    technique offers a rapid method to characterize domains and domain walls in 2D
    semiconductors with rhombohedral stacking.
  description_type: abstract
  lang: und

## Creator

- name: Jing Liang
  role: author
- name: Yuan Xie
  role: author
- name: Dongyang Yang
  role: author
- name: Shangyi Guo
  role: author
- name: Kenji Watanabe
  role: author
  orcid: https://orcid.org/0000-0003-3701-8119
  organization: National Institute for Materials Science
- name: Takashi Taniguchi
  role: author
  orcid: https://orcid.org/0000-0002-1467-3105
  organization: National Institute for Materials Science
- name: Jerry I. Dadap
  role: author
- name: David Jones
  role: author
- name: Ziliang Ye
  role: author

## Contact agent



## Publisher

organization: American Physical Society (APS)

## Managing organization



## Keyword

- subject: ferroelectric switching
  schema: not_defined
- subject: 'nanosecond
    '
  schema: not_defined
- subject: '3R-MoS2
    '
  schema: not_defined

## Rights

- identifier: https://creativecommons.org/licenses/by/4.0/
  date_licensed: 2025-06-04

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo



## Journal

- title: Physical Review X
  issn: '21603308'
  volume: '15'
  issue: '2'
  article_number: '021081'

## Conference



## Related item



## Funding

- funder_name: Natural Sciences and Engineering Research Council of Canada
- funder_name: New Frontiers Initiative
- funder_name: Canada Foundation for Innovation
- funder_name: Canada First Research Excellence Fund
- funder_name: Max-Planck-Gesellschaft
- funder_name: University of Tokyo
- identifier: 19H05790
  funder_name: Japan Society for the Promotion of Science
- identifier: 20H00354
  funder_name: Japan Society for the Promotion of Science
- identifier: 21H05233
  funder_name: Japan Society for the Promotion of Science

## Instrument



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## Instrument managing organization



## Measurement method



## Specimen



## Chemical composition



## Structure for specimen



## Structural feature for specimen



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## Process for specimen treatment



## Computational method



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## Fileset

- id: 5e6bf592-9a2e-40ff-8295-ce188e533845
  filename: PhysRevX.15.021081.pdf
  content_type: application/pdf
  size: 1702608
  md5: c0ee98de00ba58fbb74a7bb1d0b223c5

## Thumbnail

fileset_id: 5e6bf592-9a2e-40ff-8295-ce188e533845
filename: PhysRevX.15.021081.pdf