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Proceedings Paper

Valley-selective optical Stark effect of exciton-polaritons in a monolayer semiconductor
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Paper Abstract

Microcavity exciton-polaritons based on transition metal dichalcogenide monolayers (TMDs) are a promising platform for coherent valleytronics, exhibiting valley-dependent phenomena at room-temperature. Using polarization-dependent transient reflectance, we demonstrate the valley-exclusive nature of the optical Stark effect in WS2 exciton-polaritons. We observe a simultaneous shift of both polariton branches when pump and probe are co-polarized and no appreciable shift when they are cross-polarized, demonstrating a polarization-selective stark shift in exciton-polaritons. This work highlights how the unique features of TMD exciton-polaritons can give rise to new polaritonic phenomena.

Paper Details

Date Published: 18 February 2020
PDF: 7 pages
Proc. SPIE 11282, 2D Photonic Materials and Devices III, 112820D (18 February 2020); doi: 10.1117/12.2546644
Show Author Affiliations
Trevor LaMountain, Northwestern Univ. (United States)
Erik J. Lenferink, Northwestern Univ. (United States)
Samuel H. Amsterdam, Northwestern Univ. (United States)
Mark C. Hersam, Northwestern Univ. (United States)
Nathaniel P. Stern, Northwestern Univ. (United States)

Published in SPIE Proceedings Vol. 11282:
2D Photonic Materials and Devices III
Arka Majumdar; Carlos M. Torres Jr.; Hui Deng, Editor(s)

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