Oscillations of a giant enhancement of inelastic light scattering in periodic plasmonic structures as a function of metallic film thickness

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Abstract

It was discovered that in metallic films with periodic holes (the size of the square hole was half the period) the effect of a giant enhancement of the intensity of inelastic light scattering is observed, and the enhancement coefficient depends significantly on the thickness of the metal (silver). It is shown that when the thickness of the silver film changes in the range from 5 nm to 140 nm, strong oscillations of the enhancement coefficient are observed, and the amplitude of the oscillations can be more than an order of magnitude. The observed oscillations are explained in terms of the resonant excitation of standing plasmon-polariton waves in metal films, which dispersion varies significantly with variation of the metal thickness.

About the authors

T. D Rudakov

Osipyan Institute of Solid-State Physics of the Russian Academy of Sciences

Chernogolovka, Russia

A. S Astrakhantseva

Osipyan Institute of Solid-State Physics of the Russian Academy of Sciences

Chernogolovka, Russia

S. M Makarovskaya

Osipyan Institute of Solid-State Physics of the Russian Academy of Sciences

Chernogolovka, Russia

V. V Soloviev

Osipyan Institute of Solid-State Physics of the Russian Academy of Sciences

Chernogolovka, Russia

I. V Kukushkin

Osipyan Institute of Solid-State Physics of the Russian Academy of Sciences

Email: kukush@issp.ac.ru
Chernogolovka, Russia

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