Figure 3
From: Electric field-controlled transformation of the eigenmodes in a twisted-nematic Fabry–Pérot cavity
TN-FPC mode spectra measured for the unpolarized incident light Tunpol (solid lines) at (а) an under-threshold voltage of U = 0.74 V and (b) a voltage of U = 0.97 V at which the Gooch–Tarry maximum shifts to a wavelength of 484.3 nm from the initial position 560 nm (see Fig. 1a). The dashed line shows the spectrum of polarized ro modes (T⊥-component) measured in zero voltage.
