Spatio-TemporalMetasurface for Real-time 2-D Spectrum Analysis
Abstract
A spatio-temporal metasurface is proposed to decompose in real time the temporal frequencies of electromagnetic waves into spatial frequencies onto a two-dimensional plane. The metasurface is analyzed and demonstrated using Fourier analysis. The required transmittance function is derived from an equivalent free-space optical system consisting of the cascade combination of a wedge, a diffraction grating and a focusing lens. The metasurface must exhibit both multi-resonance over a broad bandwidth and 1-D grating-type scanning to achieve the specified 2-D frequency scanning in space. Compared to state-of-the art related systems, the proposed metasurface system is more compact as it requires only one dispersive structure, while maintaining the high frequency resolution that characterizes 2-D spatial-temporal mapping systems.
Cite
@article{arxiv.1412.7791,
title = {Spatio-TemporalMetasurface for Real-time 2-D Spectrum Analysis},
author = {Shulabh Gupta and Christophe Caloz},
journal= {arXiv preprint arXiv:1412.7791},
year = {2014}
}
Comments
10 pages, 8 figures