Fig. 2: Rabi splitting in LH2 polaritons.
From: Optical cavity-mediated exciton dynamics in photosynthetic light harvesting 2 complexes

a Angle-resolved absorption (transverse electric mode) spectra and the fitting results from a 3-by-3 coupled oscillator model; b absorption spectrum of the strong coupled cavity at 30° (red solid line) and the LH2 film absorbance (dashed gray line) c the Hopfield coefficients of each polariton state.