Characteristic Properties Of Attenuated Total Reflection Spectroscopy In Terahertz Region

Experiments on the attenuated total reflection spectroscopy in the terahertz region were carried out using two homemade modules with silicon prisms developed for Fourier spectrometers and a free electron laser as radiation source. Spectra of water, water solutions, perfluorodecaline, paraffine oil, and amino acid powders were recorded. Real and imaging parts of the refractive index were retrieved using Kronig-Kramers transform or by direct solution of Fresnel equations. For a monochromatic radiation source two measurements at two different incident angles, rather than for two polarizations, were found to be an optimal method for the complex refractive index determination.

Keywords:
Attenuated total reflection spectroscopy, terahertz region, Fourier spectrometer, free electron laser.
УДК 535.7/535-14

Characteristic Properties Of Attenuated Total Reflection Spectroscopy In Terahertz Region