Gouy shift correction for highly accurate refractive index retrieval in time-domain terahertz spectroscopy
Status PubMed-not-MEDLINE Language English Country United States Media print
Document type Journal Article, Research Support, Non-U.S. Gov't
PubMed
20720911
DOI
10.1364/oe.18.015338
PII: 203607
Knihovny.cz E-resources
- Publication type
- Journal Article MeSH
- Research Support, Non-U.S. Gov't MeSH
Terahertz spectroscopic measurements are usually performed in focused beam geometry while the standard routine for the retrieval of the sample refractive index assumes plane-wave approximation. In this paper we propose a model for the transmission function which accounts for spatially limited Gaussian terahertz beams. We demonstrate experimentally its validity and applicability for an accurate extraction of the refractive index from experimental data.
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