[Marc, Shalika]

To measure the extinction ratio of our LC, we removed the polarizer and rotated the LC to measure the maximum and minimum of the transmitted power.

To be more precise, the transmitted power is normalized by the input power.

We repeated this measurement for several voltages applied to the LC as in the attached figure.

The errorbars are coming from the power fluctuations we measured.

The extinction ratio seems quite constant at all voltages at about 1.009+/-0.002