Generic singularities of scattering coefficients and a paradox of resonant wave scattering

Brynkin, Y.A.; Tribelsky, M.I.

Статья опубликована в высокорейтинговом журнале

Информация о цитировании статьи получена из Web of Science, Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 11 ноября 2019 г.

Авторы: Brynkin Yaroslav A., Tribelsky Michael I.
Журнал: Physical Review A - Atomic, Molecular, and Optical Physics
Том: 100
Номер: 1
Год издания: 2019
Издательство: American Physical Society
Местоположение издательства: United States
Первая страница: 013834
DOI: 10.1103/PhysRevA.100.013834
Аннотация: We show that in the exact solution describing the resonant scattering of a plane monochromatic electromagnetic wave by a lossless spherical or cylindrical particle of radius R, the scattering coefficients in the multipolar expansion have the generic singularities at vanishing R and certain values of the particle permittivity. At these singularities, the linewidths of the corresponding resonances turn to zero, while the partial cross sections do not have definite limits and may take any value from a certain domain. The value depends on the trajectory along which one approaches the singularities in the plane of the problem parameters. To resolve the singularity it is required to go beyond the commonly used monochromatic approximation, to take into account the finite linewidth of the incident wave, and then to perform the correct sequence of limit transitions, while the straightforward application of the monochromatic approximation may give rise to erroneous results. The effects of finite dissipation are discussed too. Our study may be important for a broad class of resonant wave scattering phenomena associated with high-Q resonances, in particular to the problem of the incident wave interaction with the bound states in the continuum.
Добавил в систему: Трибельский Михаил Исаакович

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Generic singularities of scattering coefficients and a paradox of resonant wave scatteringстатья

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