Broadband reflection spectra of saccharides in the THz and IR ranges

The reflection spectra of pure single-phase pressed samples of saccharides were measured using coherent submillimeter, pulsed terahertz, and broadband Fourier IR spectroscopy, and the parameters of their absorption bands were estimated using an additive classical oscillator model. The possibility of analyzing the vibrational spectrum with the correction of scattering from calibration data in the visible and terahertz ranges is shown. The sensitivity and accuracy of this approach are limited by the low values of reflection coefficient and, as a consequence, the low signal-to-noise ratio, as well as the asymmetric broadening of the bands associated with the anharmonicity of the vibrations and the overlap of the absorption lines.