Extremely Efficient Light-Exciton Interaction in a Monolayer WS2 van der Waals Heterostructure Cavity

Itai Epstein, Bernat Terres, Andre J. Chaves, Varun Varma Pusapati, Daniel A. Rhodes, Bettina Frank, Valentin Zimmermann, Ying Qin, Kenji Watanabe, Takashi Taniguchi, Harald Giessen, Sefaattin Tongay, James C. Hone, Nuno M.R. Peres, Frank H.L. Koppens

Research output: Chapter in Book/Report/Conference proceedingConference contribution


Excitons in monolayer transition-metal-dichalcogenides dominate their optical response, however, the achieved light-exciton interaction strength have been far below unity, and a complete picture of its underlying physics and fundamental limits has not been provided. Using a van der Waals heterostructure cavity, we demonstrate near-unity excitonic absorption, together with efficient emission at ultra-low excitation powers. We find that the interplay between the radiative, non-radiative and dephasing decay rates plays a crucial role in this interaction, and unveil a universal absorption law for excitons in 2D systems.

Original languageEnglish (US)
Title of host publication2020 Conference on Lasers and Electro-Optics, CLEO 2020 - Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781943580767
StatePublished - May 2020
Event2020 Conference on Lasers and Electro-Optics, CLEO 2020 - San Jose, United States
Duration: May 10 2020May 15 2020

Publication series

NameConference Proceedings - Lasers and Electro-Optics Society Annual Meeting-LEOS
ISSN (Print)1092-8081


Conference2020 Conference on Lasers and Electro-Optics, CLEO 2020
Country/TerritoryUnited States
CitySan Jose

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering


Dive into the research topics of 'Extremely Efficient Light-Exciton Interaction in a Monolayer WS<sub>2</sub> van der Waals Heterostructure Cavity'. Together they form a unique fingerprint.

Cite this