Journal article Broadband enhancement of absorption by two-dimensional atomic crystals modeled as non-Hermitian photonic scattering
Xingzhou Chen (author) (Search by this author)
;
Zheng Sun (author) (Search by this author)
;
Min Zhang (author) (Search by this author)
;
Ming Li (author) (Search by this author)
;
Zhigao Hu (author) (Search by this author)
;
Kenji Watanabe (author) (Search by this author)
ORCID https://orcid.org/0000-0003-3701-8119
National Institute for Materials Science
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ORCID SAMURAI ;
Takashi Taniguchi (author) (Search by this author)
ORCID https://orcid.org/0000-0002-1467-3105
National Institute for Materials Science
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ORCID SAMURAI ;
David Snoke (author) (Search by this author)
;
Zhe-Yu Shi (author) (Search by this author)
;
Jian Wu (author) (Search by this author)
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Citation
Xingzhou Chen, Zheng Sun, Min Zhang, Ming Li, Zhigao Hu, Kenji Watanabe, Takashi Taniguchi, David Snoke, Zhe-Yu Shi, Jian Wu. Broadband enhancement of absorption by two-dimensional atomic crystals modeled as non-Hermitian photonic scattering. Applied Physics Letters. 2023, 122 (4), 041105. https://doi.org/10.1063/5.0134789
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(abstract)

We report the design and fabrication of a vertical structure using a distributed Bragg reflector (DBR) and spacer layer to achieve optimized optical absorption enhancement for a stack of monolayer WS2 and MoS2, namely a 10-fold increase of absorption over a 100 nm spectral range. Our research indicates that we can approach over 50% absorption by finely tuning the thickness of the spacer layer. Our theoretical model shows that the dependence of the absorption coefficient on the spacer thickness can be understood as a solution of a non-Hermitian Schrodinger equation. These results advance the development of broadband optical devices using two-dimensional excitonic materials.

Rights:

Keyword: Vertical structure, optical absorption, distributed Bragg reflecto

Date published: 2023-01-23

Publisher: AIP Publishing

Journal:

  • Applied Physics Letters (ISSN: 00036951) vol. 122 issue. 4 041105

Funding:

  • National Natural Science Foundation of China 11834004
  • National Natural Science Foundation of China 12004115
  • National Natural Science Foundation of China 62090013
  • National Natural Science Foundation of China 62074058
  • National Natural Science Foundation of China 61974043
  • National Key Research and Development Program of China 2021YFA1200803
  • National Key Research and Development Program of China 2019YFB2203403
  • National Key Research and Development Program of China 2018YFA0306303
  • A3 Foresight by JSPS
  • National Natural Science Foundation of China 12174111
  • Shanghai Pujiang Program 21PJ1403000
  • Shanghai Pujiang Program 20PJ1403600
  • Shanghai Sailing Program 20YF1411600
  • National Natural Science Foundation of China 61974044
  • Science and Technology Commission of Shanghai Municipality 21JC1402100
  • Science and Technology Commission of Shanghai Municipality 19511120100
  • U.S. Army W911NF-17-1-0312
  • Japan Society for the Promotion of Science London 19H05790
  • Japan Society for the Promotion of Science London 20H00354
  • Japan Society for the Promotion of Science London 21H05233

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

MDR DOI:

First published URL: https://doi.org/10.1063/5.0134789

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Updated at: 2025-02-26 12:30:30 +0900

Published on MDR: 2025-02-26 12:30:30 +0900

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