# Ultrafast Floquet engineering of Fermi-polaron resonances in charge-tunable monolayer WSe2 devices

https://mdr.nims.go.jp/datasets/d03538df-88a9-43c0-b5f3-2ed74ffbebeb

## File

- [s41467-024-55138-5.pdf](https://mdr.nims.go.jp/filesets/2557d884-1c20-41e7-b664-98660626a703/download) ([Detail](https://mdr.nims.go.jp/filesets/2557d884-1c20-41e7-b664-98660626a703.md))

## Id

d03538df-88a9-43c0-b5f3-2ed74ffbebeb

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2025-02-05T07:53:39.326685Z

## Updated at

2025-02-06T03:31:06.207034Z

## Published at

2025-02-06T03:31:06.307746Z

## Doi



## First published url

https://doi.org/10.1038/s41467-024-55138-5

## Date published

2024-12-30

## Recorded date published



## Resource type

journal_article

## Manuscript type

vor

## Collection



## Title

- title: Ultrafast Floquet engineering of Fermi-polaron resonances in charge-tunable
    monolayer WSe2 devices
  title_type: original
  lang: en

## Description

- description: Fermi polarons are emerging quasiparticles when a bosonic impurity
    immersed in a fermionic bath. Depending on the boson- fermion interaction strength,
    the Fermi-polaron resonances exhibit either attractive or repulsive interactions,
    which impose further experimental challenges on understanding the subtle light-driven
    dynamics. Here, we report the light-driven dynamics of attractive and repulsive
    Fermi polarons in monolayer WSe2 devices. Time-resolved polaron resonances are
    probed using femtosecond below-gap Floquet engineering with tunable exciton-Fermi
    sea interactions. While conventional optical Stark shifts are observed in the
    weak interaction regime, the resonance shift of attractive polarons increases,
    but that of repulsive polarons decreases with increasing the Fermi-sea density.
    A model Hamiltonian using Chevy ansatz suggests the off-resonant pump excitation
    influences the free carriers that interact with excitons in an opposite valley,
    thereby reducing the binding energy of attractive polarons. Our findings may enable
    coherent Floquet engineering of Bose-Fermi mixtures in ultrafast time scales.
  description_type: abstract
  lang: und

## Creator

- name: Hyojin Choi
  role: author
- name: Jinjae Kim
  role: author
  orcid: https://orcid.org/0009-0003-9517-2824
- name: Jiwon Park
  role: author
- name: Jekwan Lee
  role: author
- name: Wonhyeok Heo
  role: author
- name: Jaehyeon Kwon
  role: author
- name: Suk-Ho Lee
  role: author
- name: Faisal Ahmed
  role: author
- name: Kenji Watanabe
  role: author
  orcid: https://orcid.org/0000-0003-3701-8119
- name: Takashi Taniguchi
  role: author
  orcid: https://orcid.org/0000-0002-1467-3105
- name: Zhipei Sun
  role: author
  orcid: https://orcid.org/0000-0002-9771-5293
- name: Moon-Ho Jo
  role: author
  orcid: https://orcid.org/0000-0002-3160-358X
- name: Hyunyong Choi
  role: author
  orcid: https://orcid.org/0000-0003-3295-1049

## Contact agent



## Publisher

organization: Springer Science and Business Media LLC

## Managing organization



## Keyword

- subject: Fermi polarons
  schema: not_defined
- subject: light-driven dynamics
  schema: not_defined
- subject: monolayer WSe2
  schema: not_defined

## Rights

- identifier: https://creativecommons.org/licenses/by-nc-nd/4.0/

## Other identifier(s)



## Data origin



## Embargo



## Journal

- title: Nature Communications
  issn: '20411723'
  volume: '15'
  issue: '1'
  article_number: '10852'

## Conference



## Related item



## Funding

- identifier: 2021R1A2C3005905
  funder_name: National Research Foundation of Korea
- identifier: RS-2024-00413957
  funder_name: National Research Foundation of Korea
- identifier: 2019R1A5A1027055
  funder_name: National Research Foundation of Korea
- identifier: IBS-R034-D1
  funder_name: National Research Foundation of Korea
- identifier: RS-2023-00258359
  funder_name: National Research Foundation of Korea

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## Fileset

- id: 2557d884-1c20-41e7-b664-98660626a703
  filename: s41467-024-55138-5.pdf
  content_type: application/pdf
  size: 2153328
  md5: c883084de95aa0882d497e9510bbc447

## Thumbnail

fileset_id: 2557d884-1c20-41e7-b664-98660626a703
filename: s41467-024-55138-5.pdf