Fig. 4: Giant THz optical response.
a, THz absorbance spectra (normalized by thickness) of fused silk fabricated at different temperatures and 1.0 GPa. b, Polarization ellipticity angle after incident THz linear polarization transmitted thought the three fused silk specimens. c, Calculated g-factor of the three specimens in the THz regime. d, THz-TDP setup. P1, P2 and P3 indicate the first, second and third polarizers. e–g, THz cross-polarization state images for the fused silk (e, from left to right: 95 °C, 0.2 GPa; 125 °C, 1.0 GPa; and 185 °C, 1.0 GPa), random degummed silk (f) and regenerated silk cast film (g).
