Photoluminescence Enhancement of Monolayer WS2 by n-Doping with an Optically Excited Gold Disk Articles uri icon

authors

  • TUGCHIN, BAYARJARGAL N.
  • DOOLAARD, NATHAN
  • BARREDA GOMEZ, ANGELA INMACULADA
  • ZHANG, ZIFEI
  • ROMASHKINA, ANASTASIA
  • FASOLD, STEFAN
  • Staude, Isabelle
  • EILENBERGER, FALK
  • PERSTCH, THOMAS

publication date

  • November 2023

start page

  • 10848

end page

  • 10855

issue

  • 23

International Standard Serial Number (ISSN)

  • 1530-6984

Electronic International Standard Serial Number (EISSN)

  • 1530-6992

abstract

  • In nanophotonics and quantum optics, we aim to control and manipulate light with tailored nanoscale structures. Hybrid systems of nanostructures and atomically thin materials are of interest here, as they offer rich physics and versatility due to the interaction between photons, plasmons, phonons, and excitons. In this study, we explore the optical and electronic properties of a hybrid system, a naturally n-doped monolayer WS2 covering a gold disk. We demonstrate that the nonresonant excitation of the gold disk in the high absorption regime efficiently generates hot carriers via localized surface plasmon excitation, which n-dope the monolayer WS2 and enhance the photoluminescence emission by regulating the multiexciton population and stabilizing the neutral exciton emission. The results are relevant to the further development of nanotransistors in photonic circuits and optoelectronic applications.

keywords

  • tmdc; monolayer ws2; electrical doping; pl enhancement; plasmon-exciton coupling; hybrid structure; kpfm