Scattering-free pulse propagation through invisible non-Hermitian media
Scattering-free pulse propagation through invisible non-Hermitian media
We demonstrate a design principle for unidirectionally invisible non-Hermitian structures that are invisible not only for one specific wavelength but rather for a broad frequency range. Our idea is based on the concept of constant-intensity waves, which can propagate even through highly disordered media without backscattering or intensity variations. In …