Gate controlled resonant widths in double-bend waveguides: bound states in the continuum

Almas F Sadreev; Dmitrii N Maksimov; Artem S Pilipchuk

doi:10.1088/0953-8984/27/29/295303

Gate controlled resonant widths in double-bend waveguides: bound states in the continuum

J Phys Condens Matter. 2015 Jul 29;27(29):295303. doi: 10.1088/0953-8984/27/29/295303. Epub 2015 Jul 3.

Authors

Almas F Sadreev¹, Dmitrii N Maksimov, Artem S Pilipchuk

Affiliation

¹ Kirensky Institute of Physics Siberian Branch of Russian Academy of Sciences, 660036, Krasnoyarsk, Russia.

PMID: 26139696
DOI: 10.1088/0953-8984/27/29/295303

Abstract

We consider quantum transmission through double-bend [Formula: see text]- and Z-shaped waveguides controlled by the finger gate potential. Using the effective non-Hermitian Hamiltonian approach we explain the resonances in transmission. We show a difference in transmission in the short waveguides that is the result of different chirality in Z and [Formula: see text] waveguides. We demonstrate that the potential selectively affects the resonant widths resulting in the occurrence of bound states in the continuum.