We show that an artificially grown diamond plate serves as a very broadband beam splitter from approximately 7 μm, where the intrinsic diamond absorption becomes important, to the submillimeter region (a 250-μm wavelength or longer).
© 1998 Optical Society of America
John C. Brasunas, G. Mark Cushman, and Brook Lakew, "Artificial Diamond as a Broadband Infrared Beam Splitter for Fourier Transform Spectroscopy," Appl. Opt. 37, 4226-4229 (1998)