Сибирский федеральный университет

Тип публикации: статья из журнала

Год издания: 2017

Идентификатор DOI: 10.1103/PhysRevA.96.013841

Аннотация: We report bound states in the radiation continuum (BICs) in a single infinitely long dielectric rod with periodically stepwise modulated permittivity alternating from ϵ1 to ϵ2. For ϵ2=1 in air the rod is equivalent to a stack of dielectric disks with permittivity ϵ1. Because of rotational and translational symmetries the BICs are classified by orbital angular momentum m and the Bloch wave vector β directed along the rod. For m=0 and β=0 the symmetry protected BICs have definite polarization and occur in a wide range of the radius of the rod and the dielectric permittivities. More involved BICs with m≠0,β=0 exist only for a selected radius of the rod at a fixed dielectric constant. The existence of robust Bloch BICs with β≠0,m=0 is demonstrated. Asymptotic limits to a homogeneous rod and to very thin disks are also considered. © 2017 American Physical Society.

Журнал: Physical Review A

Выпуск журнала: Vol. 96, Is. 1

Номера страниц: 13841

ISSN журнала: 24699926

Издатель: American Physical Society

• Bulgakov E.N. (Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, Russian Federation, Siberian State Aerospace University, Krasnoyarsk, Russian Federation)
• Sadreev A.F. (Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, Russian Federation)

• Scopus