A simple transfer-function-based approach for estimating material parameters from terahertz time-domain data

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). ISSN 1943-0655

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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.

Item Type:
Journal Article
Journal or Publication Title:
IEEE Photonics Journal
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/3100/3105
Subjects:
ID Code:
68241
Deposited By:
Deposited On:
24 Jan 2014 05:42
Refereed?:
Yes
Published?:
Published
Last Modified:
20 Oct 2020 02:36