Four-Dimensional Wave Transformations By Space-Time Metasurfaces
Abstract
Static metasurfaces have shown to be prominent compact structures for reciprocal and frequency-invariant transformation of electromagnetic waves in space. However, incorporating temporal variation to static metasurfaces would result in dynamic apparatuses which are capable of four-dimensional tailoring of both the spatial and temporal characteristics of electromagnetic waves, leading to functionalities that are far beyond the capabilities of conventional static metasurfaces. This includes nonreciprocal full-duplex wave transmission, pure frequency conversion, parametric wave amplification, spatiotemporal decomposition, and space-time wave diffraction. This paper reviews recent progress and opportunities offered by space-time metasurfaces to break reciprocity, revealing their potential for low-energy, compact, integrated non-reciprocal devices and sub-systems, and discusses the future of this exciting research front.
Cite
@article{arxiv.2011.08423,
title = {Four-Dimensional Wave Transformations By Space-Time Metasurfaces},
author = {Sajjad Taravati and George V. Eleftheriades},
journal= {arXiv preprint arXiv:2011.08423},
year = {2020}
}
Comments
arXiv admin note: text overlap with arXiv:1902.09885