Reviews of topical problems

Resonant scattering of electromagnetic waves by small metal particles

 a, b, c, d,  e
a Lomonosov Moscow State University, Department of Physics, Leninskie Gory 1 build. 2, Moscow, 119991, Russian Federation
b Prokhorov General Physics Institute of the Russian Academy of Sciences, ul. Vavilova 38, Moscow, 119942, Russian Federation
c National Engineering Physics Institute MEPhI Engineering and Physics Institute of Biomedicine, Kashirskoe shosse 31, Moscow, 115409, Russian Federation
d Yamaguchi University, 1677-1 Yoshida, Yamaguchi City, Yamaguchi, 753-8511, Japan
e School of Engineering and Information Technology, University of New South Wales, PO Box 7916, Canberra, 2610, Australia

This review is devoted to a discussion of new (and often unexpected) aspects of the old problem of elastic light scattering by small metal particles, whose size is comparable to or smaller than the thickness of the skin layer. The main focus is on elucidating the physical grounds for these new aspects. It is shown that, in many practically important cases, the scattering of light by such particles, despite their smallness, may have almost nothing in common with Rayleigh scattering. So-called anomalous scattering and absorption, as well as Fano resonances, including unconventional (associated with the excitation of longitudinal electromagnetic oscillations) and directional Fano resonances, observed only at a small solid angle, are discussed in detail. The review contains a Mathematical Supplement, which includes a summary of the main results of the Mie theory and a discussion of some general properties of scattering coefficients. In addition to being of purely academic interest, the phenomena considered in this review can find wide applications in biology, medicine, pharmacology, genetic engineering, imaging of ultra-small objects, ultra-high-resolution spectroscopy, information transmission, recording, and processing as well as many other applications and technologies.

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Fulltext is also available at DOI: 10.3367/UFNe.2021.01.038924
Keywords: Mie resonances, Fano resonances, subwavelength optics, nanoparticles
PACS: 42.25.Fx, 42.70.−a, 78.67.−n (all)
DOI: 10.3367/UFNe.2021.01.038924
Citation: Tribelsky M I, Miroshnichenko A E "Resonant scattering of electromagnetic waves by small metal particles" Phys. Usp. 65 40–61 (2022)
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Received: 17th, August 2020, revised: 22nd, January 2021, 29th, January 2021

Оригинал: Трибельский М И, Мирошниченко А Е «Резонансное рассеяние электромагнитных волн малыми металлическими частицами: новый взгляд на старую проблему» УФН 192 45–68 (2022); DOI: 10.3367/UFNr.2021.01.038924

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