Figure 1 files contain - air references for start and end of day - time-domain data for the 320 um thick LCD with no electrode layers for both ordinary and extraordinary axes. Figure 2 files contain - air reference - time-domain data for both ordinary and extraordinary for 150 um LCD with electrode layers for a range of bias voltages. All time-domain data taken with 60 repeats, 1 ms time-constant in < 2% humidity. Figure 3 files contain time-traces of power from QCL transmitted through LCD device under bias. 150 um (3a) and 13um (3b) data bias values quoted on file names are in Vpp, bias values quoted in paper are Vrms (=0.3535*Vpp) The Nelly THz Spectroscopy package can be found at https://github.com/YaleTHz/nelly