# Coherent momentum control of forbidden excitons

https://mdr.nims.go.jp/datasets/b6005dfc-c129-4d05-8bbf-80a19dcfbede

## File

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## Id

b6005dfc-c129-4d05-8bbf-80a19dcfbede

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2025-02-27T02:11:55.590964Z

## Updated at

2025-02-27T23:30:11.141372Z

## Published at

2025-02-27T23:30:12.312476Z

## Doi



## First published url

https://doi.org/10.1038/s41467-022-34740-5

## Date published

2022-11-14

## Recorded date published



## Resource type

journal_article

## Manuscript type

vor

## Collection



## Title

- title: Coherent momentum control of forbidden excitons
  title_type: original
  lang: en

## Description

- description: A double-edged sword in two-dimensional material science and technology
    is an optically forbidden dark exciton. On the one hand, it is fascinating for
    condensed matter physics, quantum information processing, and optoelectronics
    due to its long lifetime. On the other hand, it is notorious for being optically
    inaccessible from both excitation and detection standpoints. Here, we provide
    an efficient and low-loss solution to the dilemma by reintroducing photonics bound
    states in the continuum (BICs) to manipulate dark excitons in the momentum space.
    In a monolayer tungsten diselenide under normal incidence, we observed a giant
    enhancement with an enhancement factor of ~3,100 for dark excitons enabled by
    transverse magnetic BICs with intrinsic out-of-plane electric fields. By further
    employing widely tunable Friedrich-Wintgen BICs, we demonstrated highly directional
    emission from the dark excitons with a divergence angle of merely 7 degrees. We
    found that the directional emission is coherent at room temperature, unambiguously
    shown in polarization analyses and interference measurements. Therefore, the BICs
    reintroduced as a momentum-space photonic environment could be an intriguing platform
    to reshape and redefine light-matter interactions in nearby quantum materials,
    such as low-dimensional materials, otherwise challenging or even impossible to
    achieve.
  description_type: abstract
  lang: und

## Creator

- name: Xuezhi Ma
  role: author
- name: Kaushik Kudtarkar
  role: author
- name: Yixin Chen
  role: author
- name: Preston Cunha
  role: author
- name: Yuan Ma
  role: author
- name: Kenji Watanabe
  role: author
  orcid: https://orcid.org/0000-0003-3701-8119
  organization: National Institute for Materials Science
  ror: https://ror.org/026v1ze26
- name: Takashi Taniguchi
  role: author
  orcid: https://orcid.org/0000-0002-1467-3105
  organization: National Institute for Materials Science
  ror: https://ror.org/026v1ze26
- name: Xiaofeng Qian
  role: author
- name: M. Cynthia Hipwell
  role: author
- name: Zi Jing Wong
  role: author
- name: Shoufeng Lan
  role: author

## Contact agent



## Publisher

organization: Springer Science and Business Media LLC

## Managing organization



## Keyword

- subject: Dark exciton
  schema: not_defined
- subject: photonics bound states
  schema: not_defined
- subject: directional emission
  schema: not_defined

## Rights

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

## Other identifier(s)



## Data origin



## Embargo



## Journal

- title: Nature Communications
  issn: '20411723'
  volume: '13'
  issue: '1'
  article_number: '6916'

## Conference



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## Funding

- funder_name: Texas A and M University
- funder_name: Texas A&M University | Texas A and M Engineering Experiment Station,
    Texas A and M University
- identifier: DMR-2103842
  funder_name: National Science Foundation
- identifier: JPMXP0112101001, 19H05790, 20H00354, 21H05233
  funder_name: MEXT | Japan Society for the Promotion of Science

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## Fileset

- id: 5b646c7a-314b-4a71-bcb7-6406c7c94a6a
  filename: s41467-022-34740-5.pdf
  content_type: application/pdf
  size: 3504463
  md5: 0f63b36266ad0376c2713860aad03b37

## Thumbnail

fileset_id: 5b646c7a-314b-4a71-bcb7-6406c7c94a6a
filename: s41467-022-34740-5.pdf