Nature Communications (Mar 2021)

Twist-angle engineering of excitonic quantum interference and optical nonlinearities in stacked 2D semiconductors

  • Kai-Qiang Lin,
  • Paulo E. Faria Junior,
  • Jonas M. Bauer,
  • Bo Peng,
  • Bartomeu Monserrat,
  • Martin Gmitra,
  • Jaroslav Fabian,
  • Sebastian Bange,
  • John M. Lupton

DOI
https://doi.org/10.1038/s41467-021-21547-z
Journal volume & issue
Vol. 12, no. 1
pp. 1 – 7

Abstract

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Here, the authors report on the large twist-angle susceptibility of excitons involving upper conduction bands in transition metal dichalcogenide bilayers. These high-lying excitons couple with band-edge excitons, and give rise to nonlinear quantum-optical processes that become tuneable by twisting.