Fig. 1. Sketch of the molecular director orientation in an LC cell.

Fig. 2. Setup of single-shot polarization state measurement. The inset shows two groups of fringes that are separated by a dark vertical line in the middle of the light spot.

Fig. 3. Phase delay under 500 Hz rectangular driving voltage with different amplitudes.

Fig. 4. Polarized principal axis angles under 500 Hz rectangular driving voltage with different amplitudes.

Fig. 5. Phase delay and polarized principal axis angle under different driving voltages.

Fig. 6. Evolution of phase delay angle under 1 Hz rectangular driving voltage.

Fig. 7. Evolution of polarized principal axis angle under 1 Hz rectangular driving voltage.