Figure 2
From: Continuously-tunable light–matter coupling in optical microcavities with 2D semiconductors
(a) Eigen-energies of the upper and lower polariton states (blue squares and red triangles, respectively) as well as of the weakly coupled cavity system (green circles) based on calculated reflectivity spectra (corresponding to a setup like in Fig. 1a). For each simulation, the 2D material WS2 is placed at the corresponding distance z towards the left mirror. The black dashed line marks the exciton’s energy (left scale). The solid black line represents the cavity’s mode for which the imaginary part of the refractive index of WS2 is neglected (corresponding to an uncoupled system, i.e. Eres = ħωcav). (b) Calculated absolute relative electric field strength of the empty cavity (black line) with dots representing the calculated coupled-mode splitting normalized to its maximum (left axis). In all graphs, the gray dotted line in the background marks the refractive index modulation (right scale) of the empty cavity consisting of DBRs and an air gap.
