Fig. 3
From: Two-dimensional semiconductors in the regime of strong light-matter coupling
Strong coupling in experiments. a Open cavity based on two separated DBR mirrors (shaded blue), the ML TMDC (dark gray) is on the bottom mirror79. b The distance between the mirrors is controlled by a piezo stepper motor, which allows to tune the optical cavity mode into resonance with the TMDC exciton transition, leading to an anticrossing at resonance. a, b Reproduced from Dufferwiel et al.79 c Strong light-matter coupling conditions in lithographically defined second order grating structures82. The TMDC ML is exfoliated directly onto the silicon nitride structure. d The anticrossing between cavity mode predicted by theory (Sim) is clearly observed in the PL measurements (Exp). c, d Reproduced from Zhang et al.82 e Hybrid microcavity with DBR at the bottom and thin metal layer on top85. f The lower and upper polariton branch are observed, with error bars of the energy position given by the lineshape analysis and spectral resolution of the experiment. The position of the cavity resonance C and the exciton resonance X in the absence of coupling are marked by dashed lines. e, f Reproduced from Lundt et al.85
