Fig. 2: Tunability of liquid crystal microcavity.

Applying voltage to the structure results in rotation of the liquid crystal molecules, which leads to controllable splitting of the cavity modes. Angle-resolved reflectance spectra a without and b with applied voltage. Positions of the cavity modes polarized in the vertical (V) and horizontal (H) directions are marked with green and purple dashed lines, respectively. The laser energy used in experiments is denoted with a white solid line. c Cross-sections of reflectance maps for normal incidence for four applied voltages showing tunability. d Dependence on the applied voltage of the energy splitting between horizontally and vertically polarized cavity modes for normal incidence (left axis) and Q-factor of horizontally and vertically polarized cavity modes (right axis)