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

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

Engineering, Ira A. Fulton Schools of (IAFSE)

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

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 language	English (US)
Title of host publication	2020 Conference on Lasers and Electro-Optics, CLEO 2020 - Proceedings
Publisher	Institute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)	9781943580767
State	Published - May 2020
Event	2020 Conference on Lasers and Electro-Optics, CLEO 2020 - San Jose, United States Duration: May 10 2020 → May 15 2020

Publication series

Name	Conference Proceedings - Lasers and Electro-Optics Society Annual Meeting-LEOS
Volume	2020-May
ISSN (Print)	1092-8081

Conference

Conference	2020 Conference on Lasers and Electro-Optics, CLEO 2020
Country/Territory	United States
City	San Jose
Period	5/10/20 → 5/15/20

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Electrical and Electronic Engineering

Cite this

Epstein, I., Terres, B., Chaves, A. J., Pusapati, V. V., Rhodes, D. A., Frank, B., Zimmermann, V., Qin, Y., Watanabe, K., Taniguchi, T., Giessen, H., Tongay, S., Hone, J. C., Peres, N. M. R., & Koppens, F. H. L. (2020). Extremely Efficient Light-Exciton Interaction in a Monolayer WS₂ van der Waals Heterostructure Cavity. In 2020 Conference on Lasers and Electro-Optics, CLEO 2020 - Proceedings Article 9192061 (Conference Proceedings - Lasers and Electro-Optics Society Annual Meeting-LEOS; Vol. 2020-May). Institute of Electrical and Electronics Engineers Inc..

Extremely Efficient Light-Exciton Interaction in a Monolayer WS₂ van der Waals Heterostructure Cavity. / Epstein, Itai; Terres, Bernat; Chaves, Andre J. et al.
2020 Conference on Lasers and Electro-Optics, CLEO 2020 - Proceedings. Institute of Electrical and Electronics Engineers Inc., 2020. 9192061 (Conference Proceedings - Lasers and Electro-Optics Society Annual Meeting-LEOS; Vol. 2020-May).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Epstein, I, Terres, B, Chaves, AJ, Pusapati, VV, Rhodes, DA, Frank, B, Zimmermann, V, Qin, Y, Watanabe, K, Taniguchi, T, Giessen, H, Tongay, S, Hone, JC, Peres, NMR & Koppens, FHL 2020, Extremely Efficient Light-Exciton Interaction in a Monolayer WS₂ van der Waals Heterostructure Cavity. in 2020 Conference on Lasers and Electro-Optics, CLEO 2020 - Proceedings., 9192061, Conference Proceedings - Lasers and Electro-Optics Society Annual Meeting-LEOS, vol. 2020-May, Institute of Electrical and Electronics Engineers Inc., 2020 Conference on Lasers and Electro-Optics, CLEO 2020, San Jose, United States, 5/10/20.

Epstein I, Terres B, Chaves AJ, Pusapati VV, Rhodes DA, Frank B et al. Extremely Efficient Light-Exciton Interaction in a Monolayer WS₂ van der Waals Heterostructure Cavity. In 2020 Conference on Lasers and Electro-Optics, CLEO 2020 - Proceedings. Institute of Electrical and Electronics Engineers Inc. 2020. 9192061. (Conference Proceedings - Lasers and Electro-Optics Society Annual Meeting-LEOS).

Epstein, Itai ; Terres, Bernat ; Chaves, Andre J. et al. / Extremely Efficient Light-Exciton Interaction in a Monolayer WS₂ van der Waals Heterostructure Cavity. 2020 Conference on Lasers and Electro-Optics, CLEO 2020 - Proceedings. Institute of Electrical and Electronics Engineers Inc., 2020. (Conference Proceedings - Lasers and Electro-Optics Society Annual Meeting-LEOS).

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abstract = "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.",

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AU - Rhodes, Daniel A.

AU - Frank, Bettina

AU - Zimmermann, Valentin

AU - Qin, Ying

AU - Watanabe, Kenji

AU - Taniguchi, Takashi

AU - Giessen, Harald

AU - Tongay, Sefaattin

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AB - 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.

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