Space-time gradient metasurfaces
Mesoscale and Nanoscale Physics
2015-09-30 v1 Optics
Abstract
Metasurfaces characterized by a transverse gradient of local impedance have recently opened exciting directions for light manipulation at the nanoscale. Here we add a temporal gradient to the picture, showing that spatio-temporal variations over a surface may largely extend the degree of light manipulation in metasurfaces, and break several of their constraints associated to symmetries. As an example, we synthesize a non-reciprocal classical analogue to electromagnetic induced transparency, opening a narrow window of one-way transmission in an otherwise opaque surface. These properties pave the way to magnetic free, planarized non-reciprocal ultrathin surfaces for free-space isolation.
Cite
@article{arxiv.1506.00690,
title = {Space-time gradient metasurfaces},
author = {Y. Hadad and D. L. Sounas and A. Alu},
journal= {arXiv preprint arXiv:1506.00690},
year = {2015}
}