Spectroscopy of condensed matter

Influence of photon-phonon interaction on the optical properties of aluminum powder

A. I. Kiselev, V. G. Shevchenko, A. V. Konyukova

Institute of Solid State Chemistry, Urals Branch of the Russian Academy of Sciences, 620108 Yekaterinburg, Russia

Abstract: By comparing the simulated and experimental optical conductivity, the electronic structure of the aluminum film and powder at room temperature was studied. The main attention is paid to the region of the optical conductivity spectrum at absorbed photon energies above 1.3 eV. It is assumed that in this section the form of the optical conductivity spectrum of aluminum powder is largely determined by the processes of heat release during photon-phonon interaction. From a comparison of the electronic characteristics of the spectra of the film and aluminum powder, the lower limits of the forbidden band of optical phonons of the metal-oxide interface are presumably established.

Keywords: phonons, ellipsometry, optical properties of the film, electronic characteristics of optical transitions.

Received: 27.02.2022
Revised: 09.08.2022
Accepted: 09.08.2022

DOI: 10.21883/OS.2022.10.53616.3324-22

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