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Gouy shift correction for highly accurate refractive index retrieval in time-domain terahertz spectroscopy

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    0352371 - FZÚ 2011 RIV US eng J - Journal Article
    Kužel, Petr - Němec, Hynek - Kadlec, Filip - Kadlec, Christelle
    Gouy shift correction for highly accurate refractive index retrieval in time-domain terahertz spectroscopy.
    Optics Express. Roč. 18, č. 15 (2010), s. 15338-15348. ISSN 1094-4087
    R&D Projects: GA ČR GC202/09/J045
    Institutional research plan: CEZ:AV0Z10100520
    Keywords : terahertz spectroscopy * Gouy phase shift * gaussian beams * refractive index
    Subject RIV: BM - Solid Matter Physics ; Magnetism
    Impact factor: 3.749, year: 2010

    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.
    Permanent Link: http://hdl.handle.net/11104/0191891

     
     
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