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Description:

We have placed a Van der Waals homostructure, formed by stacking three two- dimensional layers of WS2 separated by insulating hBN, similar to a multiple-quantum-well structure, inside a microcavity, which facilitates the formation of quasiparticles known as exciton- polaritons. The polaritons are a combination of light and matter, allowing unconventional laser emission. In the experiments reported here, we have observed ultra-low-threshold laser emission. The threshold was approximately 59 nW/𝜇m2, with a lasing efficiency rate of 3.82%. These findings suggest a potential for efficient laser operations using such homostructures.

Rights:

• Creative Commons BY-NC-ND Attribution-NonCommercial-NoDerivs 4.0 International
  

Keyword: Exciton-polaritons, laser emission, homostructure

Date published: 2024-07-17

Publisher: American Chemical Society (ACS)

Journal:

• ACS Photonics (ISSN: 23304022) vol. 11 issue. 7 p. 2722-2728

Funding:

• Multidisciplinary University Research Initiative W911NF-17-1-0312
• Ministry of Education, Culture, Sports, Science and Technology
• National Key Research and Development Program of China 2021YFA1200803
• Japan Society for the Promotion of Science 20H00354
• Japan Society for the Promotion of Science 23H02052
• Science and Technology Commission of Shanghai Municipality 23JC1402000
• National Natural Science Foundation of China 12174111
• Division of Materials Research DMR- 2004570

Manuscript type: Publisher's version (Version of record)

MDR DOI:

First published URL: https://doi.org/10.1021/acsphotonics.4c00549

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Updated at: 2025-02-05 16:30:20 +0900

Published on MDR: 2025-02-05 16:30:20 +0900