Analytical model of Gouy phase influence in terahertz time-domain spectroscopy

P. Koleják; K. Postava; M. Mičica; J. Pištora

doi:10.1117/12.2518421

18 December 2018 Analytical model of Gouy phase influence in terahertz time-domain spectroscopy

P. Koleják, K. Postava, M. Mičica, J. Pištora

Proceedings Volume 10976, 21st Czech-Polish-Slovak Optical Conference on Wave and Quantum Aspects of Contemporary Optics; 1097614 (2018) https://doi.org/10.1117/12.2518421
Event: 21st Czech-Polish-Slovak Optical Conference on Wave and Quantum Aspects of Contemporary Optics, 2018, Lednice, Czech Republic

Abstract

Transmission measurements using THz time-domain spectroscopy (THz-TDS) are often affected by amplitude and phase changes due to spatial properties of the focused beam. This axial anomaly is called the complex Gouy phase and significantly influences measurements as well as determination of material parameters of a measured sample. The method of the Gouy phase shift compensation has been published in our previous paper [1]. In this paper, we suggest a model of spatial-frequency dependence of the complex phase with additional effects of non-axial components due to focusing on a finite size detector.

Citation Download Citation

P. Koleják, K. Postava, M. Mičica, and J. Pištora "Analytical model of Gouy phase influence in terahertz time-domain spectroscopy", Proc. SPIE 10976, 21st Czech-Polish-Slovak Optical Conference on Wave and Quantum Aspects of Contemporary Optics, 1097614 (18 December 2018); https://doi.org/10.1117/12.2518421

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