Fig. 2: Strong coupling of excitons in 1 L MoSe2 and BIC.
From: Nonlinear polaritons in a monolayer semiconductor coupled to optical bound states in the continuum
a Schematic of a hybrid 1 L MoSe2/hBN/PCS structure. b Optical microscope image of the fabricated sample. c Angle-resolved reflectance spectra of the hybrid sample, showing the upper and lower polariton branches due to strong coupling between the MoSe2 exciton and antisymmetric TE mode of the PCS. d Differential reflectance spectra for selected angles. e Angle-resolved PL spectra (TE-polarized), with the positions of the uncoupled PCS mode and MoSe2 exciton (dashed lines) and the resulting polaritons (solid lines) indicated. f Experimental PL spectrum for kx/k = 0.015 (dots) and the Lorentz fits. The dashed lines indicate fits for uncoupled exciton and trion peaks, and the blue and red lines indicate fits for the lower and upper polariton peaks, respectively
