Investigation of dispersion properties of congruent lithium niobate crystal in the terahertz frequency range

V. S. Shumigai; E. N. Oparin; A. O. Nabilkova; M. V. Melnik; A. N. Tcypkin; S. A. Kozlov

doi:10.1117/12.2643042

16 December 2022 Investigation of dispersion properties of congruent lithium niobate crystal in the terahertz frequency range

V. S. Shumigai, E. N. Oparin, A. O. Nabilkova, M. V. Melnik, A. N. Tcypkin, S. A. Kozlov

Author Affiliations +

Proceedings Volume 12324, Infrared, Millimeter-Wave, and Terahertz Technologies IX; 1232418 (2022) https://doi.org/10.1117/12.2643042
Event: SPIE/COS Photonics Asia, 2022, Online Only

Conference Poster

Abstract

The dependences of the refractive index of a congruent LiNbO3 crystal cut perpendicular to the x and z axes on the radiation frequency in the range of 0.25–1.25 THz are presented. These dependences are presented for different values of the crystal thickness - 0.52 mm, 1 mm and 2.21 mm. A comparative analysis of the obtained dispersion curves with the results from other works is presented. The comparison was carried out by estimating the dispersion broadening of a THz pulse with time in the process of simulating its propagation in a medium with a given dispersion. It is shown that a 1.5-cycle THz pulse is broadened in media with dispersions found in other works, which does not correspond to experimental data. In accordance with this, it was concluded that the dispersion curves for congruent LiNbO3 from the considered works do not agree with the real values of the refractive index in the THz frequency range.

Conference Presentation

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V. S. Shumigai, E. N. Oparin, A. O. Nabilkova, M. V. Melnik, A. N. Tcypkin, and S. A. Kozlov "Investigation of dispersion properties of congruent lithium niobate crystal in the terahertz frequency range", Proc. SPIE 12324, Infrared, Millimeter-Wave, and Terahertz Technologies IX, 1232418 (16 December 2022); https://doi.org/10.1117/12.2643042

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