Fig. 1: Reflection spectrum of WSe2 on DBR.
From: Enhanced nonlinear interaction of polaritons via excitonic Rydberg states in monolayer WSe2
a Schematic illustration of the sample structure. b Optical image after the multilayer hBN-WSe2 stacking was transferred on top of the DBR. The area where three WSe2 layers overlap is marked with the white arrow. c Angle resolved differential reflection of multilayer structure on DBR at room temperature. Absorption features can be observed at the energies of the 1 s and 2 s exciton and are marked by the white arrows.
