The complete 16-element Mueller matrices for backscattering from amino acids, sugars, and other enantiomorphic compounds pressed into wafer form were measured at infrared wavelengths. For each compound a pair of CO2 laser lines was selected from the 9.1–11.6-μm region such that one line excited an absorption band in the compound, whereas the other did not. It was observed that at least some of the matrix elements differed significantly depending on which of the two wavelengths was used in the measurement. We propose that a neural network pattern recognition system can be trained to detect the presence of specific compounds based on multiwavelength backscatter Mueller matrix measurements.
© 1998 Optical Society of America
Arthur H. Carrieri, Jerold R. Bottiger, David J. Owens, and Erik S. Roese, "Differential Absorption Mueller Matrix Spectroscopy and the Infrared Detection of Crystalline Organics," Appl. Opt. 37, 6550-6557 (1998)