Plasmon-polariton at the interface of a uniaxial crystal and a metal: real dispersion equation and its analysis

V.I. Alshits^†, V.N. Lyubimov^‡
Federal Scientific Research Center "Crystallography and Photonics", Russian Academy of Sciences, Shubnikov Institute of Crystallography, Russian Academy of Sciences, Leninskii prosp. 59, Moscow, 119333, Russian Federaion

An analytical description of the plasmon polariton localized at the arbitrarily oriented interface of a uniaxial crystal and an isotropic metal is discussed. A compact real form of the general dispersion equation determining the basic wave properties is obtained. The solutions of this equation are analyzed for the particular orientations of the sagittal plane and interface. An approximate solution of the dispersion equation is developed on the basis of the iteration method, which has proved to be effective even for the general case of an arbitrary interface orientation. General relations of the theory are specified for a series of crystals.

Keywords: localized electromagnetic waves, polaritons in dielectrics, plasmons in metals, plasmon-polaritons at the crystal-metal interface, dispersion equation
PACS: 71.36.+c, 73.20.Mf, 78.68.+m (all)
DOI: 10.3367/UFNe.2021.12.039122
URL: https://ufn.ru/en/articles/2023/1/e/
Web of Science

001112589600004
Scopus

2-s2.0-85182899851
ADS NASA

2023PhyU...66...90A
Citation: Alshits V I, Lyubimov V N "Plasmon-polariton at the interface of a uniaxial crystal and a metal: real dispersion equation and its analysis" Phys. Usp. 66 90–102 (2023)

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Received: 29th, September 2021, revised: 19th, November 2021, accepted: 6th, December 2021

Оригинал: Альшиц В И, Любимов В Н «Плазмон-поляритон у интерфейса одноосного кристалла с металлом: вещественное дисперсионное уравнение и его анализ» УФН 193 96–109 (2023); DOI: 10.3367/UFNr.2021.12.039122

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