Terahertz planar surface plasmon interferometry

V. Gerasimov; V. Vanda; A. G. Lemzyakov; A. I. Ivanov; I. A. Azarov; A. K. Nikitin

doi:10.1117/12.2687247

26 November 2023 Terahertz planar surface plasmon interferometry

V. Gerasimov, V. Vanda, A. G. Lemzyakov, A. I. Ivanov, I. A. Azarov, A. K. Nikitin

Author Affiliations +

Proceedings Volume 12776, Infrared, Millimeter-Wave, and Terahertz Technologies X; 127760C (2023) https://doi.org/10.1117/12.2687247
Event: SPIE/COS Photonics Asia, 2023, Beijing, China

Abstract

Surface plasmon interferometry has found wide application in optical sensor devices in the visible range. In the THz region, where the surface plasmon polaritons (SPPs) propagation length extends to tens of centimeters, surface plasmon interferometers can be effectively used to control quality of the metal surface, to determine the effective permittivity of thin metal and dielectric coatings used in THz plasmonic integrated circuits, and for various sensor applications. The first THz SPP interferometer design and experimental results obtained with them in 130 to 358μm wavelength region for testing of metal surfaces and thin dielectric coatings deposited on it will be presented in this paper. The SPPs were generated by the Novosibirsk free electron laser coherent radiation on flat surfaces with gold sputtering, coated with ZnS layers of thickness from 0 to 3μm. Based on the measurement results, the value of the effective permittivity of the deposited gold was found; it turned out to be an order of magnitude smaller than that of bulk crystalline gold, which show the practical relevance of this method.

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

V. Gerasimov, V. Vanda, A. G. Lemzyakov, A. I. Ivanov, I. A. Azarov, and A. K. Nikitin "Terahertz planar surface plasmon interferometry", Proc. SPIE 12776, Infrared, Millimeter-Wave, and Terahertz Technologies X, 127760C (26 November 2023); https://doi.org/10.1117/12.2687247

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