Open AccessBound states in the continuum-induced enhancement of evanescent field confinement
Author(s) -
Sergey Lepeshov,
Andrey Bogdanov
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/2015/1/012083
Subject(s) - evanescent wave , electric field , bound state , physics , polarization (electrochemistry) , dielectric , singularity , condensed matter physics , electromagnetic field , optics , optoelectronics , quantum mechanics , chemistry , geometry , mathematics
Here, the enhancement of electromagnetic field confinement in an all-dielectric metasurface is demonstrated. The enhanced confinement is achieved when the polarization singularity, corresponding to accidental bound states in the continuum, moves to the domain of evanescent fields (under the light line). Such a hybridization of the bound states and evanescent waves results in the 70-fold increase of the electric field enhancement on the top of the metasurface and boosting of the electric field localization.