# Femtosecond switching of strong light-matter interactions in microcavities with two-dimensional semiconductors

https://mdr.nims.go.jp/datasets/6f7c527f-9b2e-47ad-a734-0278f5cc1b3a

## File

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## Id

6f7c527f-9b2e-47ad-a734-0278f5cc1b3a

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2026-02-15T07:27:55.517675Z

## Updated at

2026-02-17T03:30:39.476613Z

## Published at

2026-02-17T00:11:02.832413Z

## Doi



## First published url

https://doi.org/10.1038/s41467-025-61607-2

## Date published

2025-07-14

## Recorded date published



## Resource type

journal_article

## Manuscript type

vor

## Collection



## Title

- title: Femtosecond switching of strong light-matter interactions in microcavities
    with two-dimensional semiconductors
  title_type: original
  lang: en

## Description

- description: Ultrafast all-optical logic devices based on nonlinear light-matter
    interactions hold the promise to overcome the speed limitations of conventional
    electronic devices [1]. Strong coupling of excitons and photons inside an optical
    resonator enhances such interactions and generates new polariton states which
    give access to unique nonlinear phenomena [2], such as Bose-Einstein condensation,
    used for all-optical ultrafast polariton transistors [3]. However, the pulse energies
    required to pump such devices range from tens to hundreds of pJ [4-6], making
    them not competitive with electronic transistors. Here we introduce a new paradigm
    for all-optical switching based on the ultrafast transition from the strong to
    the weak coupling regime in microcavities embedding atomically thin transition
    metal dichalcogenides. Employing single and double stacks of hBN-encapsulated
    MoS2 homobilayers with high optical nonlinearities and fast exciton relaxation
    times, we observe a collapse of the 55-meV polariton gap and its revival in less
    than one picosecond, lowering the threshold for optical switching below 4 pJ per
    pulse, while retaining ultrahigh switching frequencies. As an additional degree
    of freedom, the switching can be triggered pumping either the intra or the interlayer
    excitons of the bilayers at different wavelengths, speeding up the polariton dynamics,
    owing to unique interspecies excitonic interactions [7]. Our approach will enable
    the development of compact ultrafast all-optical logical circuits and neural networks,
    showcasing a new platform for polaritonic information processing based on manipulating
    the light-matter coupling.
  description_type: abstract
  lang: und

## Creator

- name: Armando Genco
  role: author
- name: Charalambos Louca
  role: author
- name: Cristina Cruciano
  role: author
- name: Kok Wee Song
  role: author
- name: Chiara Trovatello
  role: author
- name: Giuseppe Di Blasio
  role: author
- name: Giacomo Sansone
  role: author
- name: Sam A. Randerson
  role: author
- name: Peter Claronino
  role: author
- name: Kyriacos Georgiou
  role: author
- name: Rahul Jayaprakash
  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: David G. Lidzey
  role: author
- name: Oleksandr Kyriienko
  role: author
- name: Stefano Dal Conte
  role: author
- name: Alexander I. Tartakovskii
  role: author
- name: Giulio Cerullo
  role: author

## Contact agent



## Publisher

organization: Springer Science and Business Media LLC

## Managing organization



## Keyword

- subject: light-matter interactions
  schema: not_defined
- subject: 'femtosecond switching
    '
  schema: not_defined
- subject: 'polaritons
    '
  schema: not_defined

## Rights

- identifier: https://creativecommons.org/licenses/by-nc-nd/4.0/
  date_licensed: 2025-07-14

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo



## Journal

- title: Nature Communications
  issn: '20411723'
  volume: '16'
  issue: '1'
  article_number: '6490'

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## Fileset

- id: 26abeed0-6b50-4188-a672-3c34078b8ced
  filename: s41467-025-61607-2.pdf
  content_type: application/pdf
  size: 3488006
  md5: ec21bf821382515ba083e1e4b70993ca

## Thumbnail

fileset_id: 26abeed0-6b50-4188-a672-3c34078b8ced
filename: s41467-025-61607-2.pdf