Systems and methods for processing and analyzing terahertz waveforms

摘要

A time-domain signal processing system for displaying, classifying, and recognizing temporal and spectral features in terahertz waveforms returned form ;materials. Specifically, novel techniques are described for classifying and analyzing the free induction decay exhibited by gases excited by far-infrared (terahertz) pulses. Illustratively, a simple geometric picture may be used for the classification of the waveforms measured for unknown gas species and gas mixtures. <IMAGE>