Nonreciprocal Lensing and Backscattering Suppression via Magneto-optical Nonlocality
Phys. Rev. Lett. 137, 186901 – Published 26 October, 2026
DOI: https://doi.org/10.1103/jbqq-v3hh
Abstract
We introduce a special kind of nonreciprocal electromagnetic response that gives rise to backscattering suppression in the bulk, a long-sought feature in topological photonics, as well as nonreciprocal lensing—an effect when the same structure focuses light incident from one direction and defocuses light propagating in the opposite way. We predict this response in spin spirals and in specially designed metamaterials, validating the key predictions.
