# Terahertz-induced population transfer between exciton complexes in monolayer                    <math>                      <msub>                        <mi>WSe</mi>                        <mn>2</mn>                      </msub>                    </math>

https://mdr.nims.go.jp/datasets/231ccbc6-ff86-489f-a45f-8317c9f06731

## File

- [2025A01543G_manuscript.pdf](https://mdr.nims.go.jp/filesets/a577c4e4-3e5c-4d48-b9ae-72b00ff8a48b/download) ([Detail](https://mdr.nims.go.jp/filesets/a577c4e4-3e5c-4d48-b9ae-72b00ff8a48b.md))

## Id

231ccbc6-ff86-489f-a45f-8317c9f06731

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2026-07-27T01:36:59.905620Z

## Updated at

2026-07-28T02:12:54.047045Z

## Published at

2026-07-28T03:27:22.285189Z

## Doi



## First published url

https://doi.org/10.1103/39cj-24hk

## Date published

2025-11-13

## Recorded date published

2025-11

## Resource type

journal_article

## Manuscript type

accepted_manuscript

## Collection



## Title

- title: Terahertz-induced population transfer between exciton complexes in monolayer                    <mml:math
    xmlns:mml="http://www.w3.org/1998/Math/MathML">                      <mml:msub>                        <mml:mi>WSe</mml:mi>                        <mml:mn>2</mml:mn>                      </mml:msub>                    </mml:math>
  title_type: original
  lang: en

## Description

- description: Two-dimensional van der Waals semiconductors feature a variety of stable
    Coulomb-bound electron-hole complexes, which determine the optical response of
    the materials and serve as primary carriers of energy and spin-valley encoded
    information. Importantly, transitions between different excitonic states are found
    in the terahertz spectral range, motivating the use of strong THz radiation for
    their manipulation on ultrafast timescales. In this work, we apply this technique
    to efficiently transfer populations within the manifold of excitonic complexes
    in monolayer WSe2, combining pulsed optical injection with a perturbation induced
    by a THz free-electron laser source. Monitoring time-resolved photoluminescence,
    we show conversion between different Coulomb-bound species across biexcitonic
    and excitonic regimes. Depending on the lattice temperature, these processes involve
    both short-lived bright and long-lived dark states. Combining experimental findings
    with theory support, we outline possible dissociation and formation pathways of
    charged excitons and biexcitons induced by the THz radiation. Finally, we demonstrate
    access to the formation dynamics of charged biexcitons under controlled conditions
    of thermalized populations of their constituents, avoiding complications of excess
    energies that otherwise occur after nonresonant optical excitation.
  description_type: abstract
  lang: en

## Creator

- name: Marzia Cuccu
  role: author
- name: Tommaso Venanzi
  role: author
- name: Edith Wietek
  role: author
- name: Xiaoxiao Sun
  role: author
- name: Raul Perea-Causin
  role: author
- name: Takashi Taniguchi
  role: author
  orcid: https://orcid.org/0000-0002-1467-3105
  organization: National Institute for Materials Science
- name: Kenji Watanabe
  role: author
  orcid: https://orcid.org/0000-0003-3701-8119
  organization: National Institute for Materials Science
- name: Ermin Malic
  role: author
- name: Manfred Helm
  role: author
- name: Stephan Winnerl
  role: author
- name: Alexey Chernikov
  role: author

## Contact agent



## Publisher

organization: American Physical Society (APS)

## Managing organization



## Keyword

- subject: WSe2
  schema: not_defined
- subject: Exciton
  schema: not_defined
- subject: Terahertz spectroscopy
  schema: not_defined

## Rights

- description: "©2025 American Physical Society"
  identifier: http://rightsstatements.org/vocab/InC/1.0/

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo



## Journal

- title: Physical Review B
  issn: 1550235X
  volume: '112'
  issue: '20'
  article_number: '205302'

## Conference



## Related item



## Funding

- funder_name: Deutsche Forschungsgemeinschaft
- funder_name: European Research Council
- identifier: 20H00354
  funder_name: Japan Society for the Promotion of Science
- identifier: 21H05233
  funder_name: Japan Society for the Promotion of Science
- identifier: 23H02052
  funder_name: Japan Society for the Promotion of Science
- funder_name: Ministry of Education, Culture, Sports, Science and Technology

## 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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## Fileset

- id: a577c4e4-3e5c-4d48-b9ae-72b00ff8a48b
  filename: 2025A01543G_manuscript.pdf
  content_type: application/pdf
  size: 2039285
  md5: d78540ebf9cbdfe0a4ec88a853e7de03

## Thumbnail

fileset_id: a577c4e4-3e5c-4d48-b9ae-72b00ff8a48b
filename: 2025A01543G_manuscript.pdf