Chiral spectral singularities spawning from quasi-bound states in the continuum in PT-symmetric dielectric metasurfaces
Sign Up to like & getrecommendations! Published in 2023 at "Applied Physics Letters"
DOI: 10.1063/5.0145987
Abstract: We investigate the chiral spectral singularities, i.e., laser threshold modes, in PT-symmetric dielectric metasurfaces originating from quasi-bound states in the continuum. The poles, referred to as the quasi-bound states in the continuum, of scattering matrix… read more here.
Keywords: bound states; states continuum; symmetric dielectric; quasi bound ... See more keywords
Two-Dimensional Glide-Symmetric Dielectric Structures for Planar Graded-Index Lens Antennas
Sign Up to like & getrecommendations! Published in 2021 at "IEEE Antennas and Wireless Propagation Letters"
DOI: 10.1109/lawp.2021.3092169
Abstract: In this letter, we propose and study a 2-D glide-symmetric dielectric periodic structure. We demonstrate that glide symmetry broadens the bandwidth of operation and achieves lower effective refractive indices when compared to non-glide configurations. These… read more here.
Keywords: lens antennas; glide symmetric; symmetric dielectric; index lens ... See more keywords