@inproceedings{e2591694b370496185329690a5239371,
title = "Valley-selective optical Stark effect of exciton-polaritons in a monolayer semiconductor",
abstract = "Microcavity exciton-polaritons based on transition metal dichalcogenide monolayers (TMDs) are a promising platform for coherent valleytronics, exhibiting valley-dependent phenomena at roomerature. 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.",
keywords = "2D Semiconductor, Exciton-Polariton, Optical Stark Effect, Valleytronics",
author = "Trevor Lamountain and Lenferink, {Erik J.} and Amsterdam, {Samuel H.} and Hersam, {Mark C.} and Stern, {Nathaniel P.}",
note = "Funding Information: The research described here has been supported by the U.S. Department of Energy, Oce of Basic Energy Sciences, Division of Materials Sciences and Engineering under Award No. DE-SC0012130 (cavity excitonpolaritons) and the Oce of Naval Research under grant number N00014-16-1-3055 (ultrafast valley manipulation). This work utilized Northwestern University Micro/Nano Fabrication Facility (NUFAB), which is partially supported by Soft and Hybrid Nanotechnology Experimental (SHyNE) Resource (NSF ECCS-1542205), the Materials Research Science and Engineering Center (DMR-1720139), the State of Illinois, and Northwestern University. Publisher Copyright: {\textcopyright} 2020 SPIE.; 2D Photonic Materials and Devices III 2020 ; Conference date: 05-02-2020 Through 06-02-2020",
year = "2020",
doi = "10.1117/12.2546644",
language = "English (US)",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
publisher = "SPIE",
editor = "Arka Majumdar and Torres, {Carlos M.} and Hui Deng",
booktitle = "2D Photonic Materials and Devices III",
}