Tych, Katarzyna and Wood, Christopher and Tych, Wlodek (2014) A simple transfer-function-based approach for estimating material parameters from terahertz time-domain data. IEEE Photonics Journal, 6 (1): 6800211. ISSN 1943-0655
Full text not available from this repository.Abstract
A novel parametrically efficient approach to estimating the spectra of short transient signals is proposed and evaluated, with an application to estimating material properties, including complex refractive index and absorption coefficient, in the terahertz (THz) frequency range. This technique includes uncertainty analysis of the obtained spectral estimates, allowing rigorous statistical comparison between samples. In the proposed approach, a simple, few-parameter continuous-time transfer function model explains over 99.9% of the measured signal. The problem, normally solved using poorly numerically defined Fourier transform deconvolution methods, is reformulated and cast as a time-domain dynamic-system estimation problem, thus providing a true time-domain spectroscopy tool.