Extremely efficient light-exciton interaction in a monolayer WS2 van der Waals heterostructure cavity

Itai Epstein; Bernat Terrés; André 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

doi:10.1364/CLEO_QELS.2020.FF3B.2

Extremely efficient light-exciton interaction in a monolayer WS₂ van der Waals heterostructure cavity

Itai Epstein, Bernat Terrés, André 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 proceeding › Conference contribution › peer-review

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
Title of host publication	CLEO
Subtitle of host publication	QELS_Fundamental Science, CLEO_QELS 2020
Publisher	Optica Publishing Group (formerly OSA)
ISBN (Print)	9781943580767
DOIs	https://doi.org/10.1364/CLEO_QELS.2020.FF3B.2
State	Published - 2020
Externally published	Yes
Event	CLEO: QELS_Fundamental Science, CLEO_QELS 2020 - Washington, United States Duration: 10 May 2020 → 15 May 2020

Publication series

Name	Optics InfoBase Conference Papers
Volume	Part F182-CLEO-QELS 2020
ISSN (Electronic)	2162-2701

Conference

Conference	CLEO: QELS_Fundamental Science, CLEO_QELS 2020
Country/Territory	United States
City	Washington
Period	10/05/20 → 15/05/20

Access to Document

10.1364/CLEO_QELS.2020.FF3B.2

Cite this

Epstein, I., Terrés, 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 CLEO: QELS_Fundamental Science, CLEO_QELS 2020 (Optics InfoBase Conference Papers; Vol. Part F182-CLEO-QELS 2020). Optica Publishing Group (formerly OSA). https://doi.org/10.1364/CLEO_QELS.2020.FF3B.2

@inproceedings{216fc84091224a45997c5733a5b90931,

title = "Extremely efficient light-exciton interaction in a monolayer WS2 van der Waals heterostructure cavity",

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.",

author = "Itai Epstein and Bernat Terr{\'e}s and Chaves, {Andr{\'e} J.} and Pusapati, {Varun Varma} and Rhodes, {Daniel A.} and Bettina Frank and Valentin Zimmermann and Ying Qin and Kenji Watanabe and Takashi Taniguchi and Harald Giessen and Sefaattin Tongay and Hone, {James C.} and Peres, {Nuno M.R.} and Koppens, {Frank H.L.}",

note = "Publisher Copyright: CLEO 2020 {\textcopyright} OSA 2020.; CLEO: QELS_Fundamental Science, CLEO_QELS 2020 ; Conference date: 10-05-2020 Through 15-05-2020",

year = "2020",

doi = "10.1364/CLEO_QELS.2020.FF3B.2",

language = "אנגלית",

isbn = "9781943580767",

series = "Optics InfoBase Conference Papers",

publisher = "Optica Publishing Group (formerly OSA)",

booktitle = "CLEO",

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Epstein, I, Terrés, 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 CLEO: QELS_Fundamental Science, CLEO_QELS 2020. Optics InfoBase Conference Papers, vol. Part F182-CLEO-QELS 2020, Optica Publishing Group (formerly OSA), CLEO: QELS_Fundamental Science, CLEO_QELS 2020, Washington, United States, 10/05/20. https://doi.org/10.1364/CLEO_QELS.2020.FF3B.2

Extremely efficient light-exciton interaction in a monolayer WS₂ van der Waals heterostructure cavity. / Epstein, Itai; Terrés, Bernat; Chaves, André J. et al.
CLEO: QELS_Fundamental Science, CLEO_QELS 2020. Optica Publishing Group (formerly OSA), 2020. (Optics InfoBase Conference Papers; Vol. Part F182-CLEO-QELS 2020).

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

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AU - Terrés, Bernat

AU - Chaves, André J.

AU - Pusapati, Varun Varma

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

AU - Hone, James C.

AU - Peres, Nuno M.R.

AU - Koppens, Frank H.L.

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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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