Exact polychromatic metasurface design: The GSTC approach

Abstract

The generalized sheet transition conditions (GSTCs) have been recently leveraged for synthesizing metasurfaces transforming specified monochromatic incident waves in arbitrary fashions. This paper extends the technique to general polychromatic designs. The resulting polychromatic metasurfaces provide unprecedented control on the temporal and spatial frequency components of incident pulsed electromagnetic waves. They may find applications in spatial filters, spatial phasers, real-time Fourier transformers and real-time spectrum analyzers.