Nonlinear plasmonics with monolayer semiconductor excitons

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

1 Scopus citations


The far-field linear and nonlinear optical response of excitons in two-dimensional (2D) semiconducting transitional metal dichalcogenides (TMDs), such as MoS2 and WSe2, have been the subject of intense investigation over the past decade. Here, we report on our experimental results measuring the linear and nonlinear response of surface plasmon polaritons (SPPs) propagating on metallic waveguides interacting with excitons in a single WSe2 monolayer. The WSe2 monolayer was encapsulated in hexagonal boron nitride and transferred on top of a metallic waveguide. The measurements were carried out at low temperature (below 11 K). We measured the linear absorption of SPPs by excitons, resulting in a 73 % attenuation of the transmitted probe. To determine the nonlinear response, we performed both optical pump-SPP probe and SPP pump-SPP probe experiments. For the SPP pump case, a differential transmission response exceeding 4 % was achieved. Time-resolved pump-probe measurements reveal a fast component of the nonlinear response of 290 fs with a slower 13.7 ps component, consistent with previous optical measurements. These plasmonic structures could open up new opportunities to probe fundamental light-matter interactions in 2D material-plasmonic heterostructures.

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 materials
  • Excitons
  • Nonlinear optics
  • Plasmonics
  • Semiconductors
  • Transition metal dichalcogenides

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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