NDLI: Near-unity light absorption in a monolayer WS2 van der Waals heterostructure cavity.

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Near-unity light absorption in a monolayer WS2 van der Waals heterostructure cavity.

Content Provider	Semantic Scholar
Author	Epstein, Itai Terres, Bernat Chaves, A. Pusapati, Varun-Varma Rhodes, Daniel A. Frank, Bettina Zimmermann, Valentin Qi, Ying Watanabe, Kenji Taniguchi, Takashi Giessen, Harald Tongay, Sefaattin James C. Peres, Nuno M. R. Koppens, Frank H. L.
Copyright Year	2020
Abstract	Excitons in monolayer transition-metal-dichalcogenides (TMDs) dominate their optical response and exhibit strong light-matter interactions with lifetime-limited emission. While various approaches have been applied to enhance light-exciton interactions in TMDs, the achieved strength have been far below unity, and a complete picture of its underlying physical mechanisms and fundamental limits has not been provided. Here, we introduce a TMD-based van der Waals heterostructure cavity that provides near-unity excitonic absorption, and emission of excitonic complexes that are observed at ultra-low excitation powers. Our results are in full agreement with a quantum theoretical framework introduced to describe the light-exciton-cavity interaction. We find that the subtle interplay between the radiative, non-radiative and dephasing decay rates plays a crucial role, and unveil a universal absorption law for excitons in 2D systems. This enhanced light-exciton interaction provides a platform for studying excitonic phase-transitions and quantum nonlinearities and enables new possibilities for 2D semiconductor-based optoelectronic devices.
File Format	PDF HTM / HTML
DOI	10.1021/acs.nanolett.0c00492
Alternate Webpage(s)	http://arxiv-export-lb.library.cornell.edu/pdf/1908.07598
Alternate Webpage(s)	https://www.pi4.uni-stuttgart.de/publications/files/2020_nanolett_epstein.pdf
Alternate Webpage(s)	http://export.arxiv.org/pdf/1908.07598
Alternate Webpage(s)	https://arxiv.org/pdf/1908.07598v6.pdf
Alternate Webpage(s)	https://export.arxiv.org/pdf/1908.07598
PubMed reference number	32283034
Alternate Webpage(s)	https://doi.org/10.1021/acs.nanolett.0c00492
Journal	Medline
Journal	Nano letters
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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