A. S. Bereza, A. E. Chernyavsky, S. V. Perminov, D. A. Shapiro, “Analysis of near-field intensity distribution in subwavelength gratings through decomposition into cylindrical waves”, Kvantovaya Elektronika, 2024, Volume 54, Number 7,Pages <nobr>456

A selection of papers presented at the International Seminar on Fiber Lasers (August 19-25, 2024, Novosibirsk)

Analysis of near-field intensity distribution in subwavelength gratings through decomposition into cylindrical waves

A. S. Bereza^a, A. E. Chernyavsky^ab, S. V. Perminov^c, D. A. Shapiro^a

^a Institute of Automation and Electrometry, Siberian Branch of Russian Academy of Sciences, Novosibirsk, Russia
^b Novosibirsk State University, Novosibirsk, Russia
^c Rzhanov Institute of Semiconductor Physics, Siberian Branch of Russian Academy of Sciences, Novosibirsk, Russia

Abstract: The study of scattering plane waves by a periodic array of parallel cylinders utilizes the method of cylindrical wave decomposition, thereby reducing the problem to a system of linear algebraic equations. This method proved to be particularly efficient when the diameter of cylinders is significantly less than the wavelength of incident wave, which results in a rapid diminution of expansion coefficients as the number increases, and facilitates computation in near field. Subsequent comparison with the results of other methods demonstrates a qualitative concordance thereby showing the efficacy of cylindrical wave decomposition in simplifying and accurately modeling wave scattering phenomena in near field in structured media.

Keywords: plane wave scattering, periodic array of parallel cylinders, cylindrical wave decomposition method, near field, intensity peaks, metamaterials.

Received: 11.10.2024