Transverse Magnetic ENZ Resonators: Robustness and Optimal Shape Design
Transverse Magnetic ENZ Resonators: Robustness and Optimal Shape Design
We study certain ``geometric-invariant resonant cavities'' introduced by Liberal et. al in a 2016 Nature Comm. paper, modeled using the transverse magnetic reduction of Maxwell's equations. The cross-section consists of a dielectric inclusion surrounded by an ``epsilon-near-zero'' (ENZ) shell. When the shell has the right area, its interaction with the …