Fig. 4: Derivative scaling analysis of polariton electroreflectance.

Scaled derivatives of the experimental reflectivity data, \(\tfrac{1}{R}\left(\tfrac{{dR}}{{dE}}\right)\), for the negatively- (a) and positively-detuned (b) 40 wt% SQ microcavities. The LP and UP features in a and b are scaled independently (as indicated by the line breaks at 1.85 eV) to match the amplitude of the corresponding experimental electroreflectance spectra in c and d; the scaling factors correspond to the field-induced UP and LP energy shifts at each angle as discussed in the text. Note that c, d are reproduced from Fig. 3e, h for ease of comparison.