Сибирский федеральный университет

Тип публикации: статья из журнала

Год издания: 2022

Идентификатор DOI: 10.1103/PhysRevB.105.075404

Аннотация: We consider light scattering by two-dimensional arrays of high-index dielectric spheres arranged into a triangular and square lattices. We demonstrate the appearance of the double degenerate accidental super-BIC modes with extremely suppressed radiative losses in the vicinity of the Formula Presented point of the leaky band of the triangular lattice. Two rings of BICs (circular lines of BICs in reciprocal space) with different polarization appear at the point of the super-BIC destruction. The radius of the ring BIC (RBIC) changes as a function of the sphere's radius. We propose a generic analytical expression to describe the behavior of the guided mode decay rate as a function of the sphere radii and the wave vector in the vicinity of the RBIC. The results are explained using a multipolar approach. ©2022 American Physical Society

Журнал: Physical Review B

Выпуск журнала: Vol. 105, Is. 7

Номера страниц: 75404

ISSN журнала: 24699950

Издатель: American Physical Society

• Kostyukov A.S. (International Research Center of Spectroscopy and Quantum Chemistry, Siberian Federal University, Krasnoyarsk, 660041, Russian Federation)
• Gerasimov V.S. (International Research Center of Spectroscopy and Quantum Chemistry, Siberian Federal University, Krasnoyarsk, 660041, Russian Federation, Institute of Computational Modelling SB RAS, Krasnoyarsk, 660036, Russian Federation)
• Ershov A.E. (International Research Center of Spectroscopy and Quantum Chemistry, Siberian Federal University, Krasnoyarsk, 660041, Russian Federation, Institute of Computational Modelling SB RAS, Krasnoyarsk, 660036, Russian Federation)
• Bulgakov E.N. (Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation)

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