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


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
ISBN (Electronic)9781510633278
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
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X


Conference2D Photonic Materials and Devices III 2020
Country/TerritoryUnited States
CitySan Francisco


  • 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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