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

Trevor LaMountain; Erik J. Lenferink; Samuel H. Amsterdam; Mark C. Hersam; Nathaniel P. Stern

doi:10.1117/12.2546644

18 February 2020 Valley-selective optical Stark effect of exciton-polaritons in a monolayer semiconductor

Trevor LaMountain, Erik J. Lenferink, Samuel H. Amsterdam, Mark C. Hersam, Nathaniel P. Stern

Proceedings Volume 11282, 2D Photonic Materials and Devices III; 112820D (2020) https://doi.org/10.1117/12.2546644
Event: SPIE OPTO, 2020, San Francisco, California, United States

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.

Conference Presentation

Citation Download Citation

Trevor LaMountain, Erik J. Lenferink, Samuel H. Amsterdam, Mark C. Hersam, and Nathaniel P. Stern "Valley-selective optical Stark effect of exciton-polaritons in a monolayer semiconductor", Proc. SPIE 11282, 2D Photonic Materials and Devices III, 112820D (18 February 2020); https://doi.org/10.1117/12.2546644

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