By using asymmetric Fourier-transform techniques, the room-temperature optical constants of z-cut quartz have been determined between 100 and 500 cm-1.
© 1980 Optical Society of America
K. D. Cummings and D. B. Tanner, "Far-infrared ordinary-ray optical constants of quartz," J. Opt. Soc. Am. 70, 123-126 (1980)