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*

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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.

Original languageEnglish (US)
Title of host publication2D Photonic Materials and Devices III
EditorsArka Majumdar, Carlos M. Torres, Hui Deng
PublisherSPIE
ISBN (Electronic)9781510633278
DOIs
StatePublished - 2020
Event2D Photonic Materials and Devices III 2020 - San Francisco, United States
Duration: Feb 5 2020Feb 6 2020

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume11282
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

Conference2D Photonic Materials and Devices III 2020
Country/TerritoryUnited States
CitySan Francisco
Period2/5/202/6/20

Funding

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.

Keywords

  • 2D Semiconductor
  • Exciton-Polariton
  • Optical Stark Effect
  • Valleytronics

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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