Solitary Spectrally-Discrete Bound States in the Continuum in an Open System
Optics
2024-04-24 v2
Abstract
Bound states in the continuum (BICs) exist in a variety of physical systems where they appear as lossless propagating states surrounded by radiating modes. However, in the case of open systems, they coexist with continuous families of guided states, which may be modes or other BICs, located in different regions of the frequency-momentum parameter space. Here we report that waveguiding structures comprising anisotropic materials with two radiation channels where continuous families of modes are not possible whatsoever can support discrete BICs that exist for a single frequency and a single propagation direction. The results are isolated spectrally-discrete BIC states existing as lossless needles emerging from a sea of radiating leaky modes.
Keywords
Cite
@article{arxiv.2010.13869,
title = {Solitary Spectrally-Discrete Bound States in the Continuum in an Open System},
author = {Samyobrata Mukherjee and Jordi Gomis-Bresco and David Artigas and Lluis Torner},
journal= {arXiv preprint arXiv:2010.13869},
year = {2024}
}