Nonlocal Transformation-Optics Metamaterials

Giuseppe Castaldi; Vincenzo Galdi; Andrea AlÃ¹; Nader Engheta

META 2021, META'12

Giuseppe Castaldi, Vincenzo Galdi, Andrea AlÃ¹, Nader Engheta

Last modified: 2012-01-04

Abstract

We introduce a new framework for transformation optics based on nonlocal coordinate transformations in the spectral (wavenumber) domain, rather than in the conventional spatial domain. Our proposed approach allows a physically-incisive and powerful geometrical interpretation in terms of deformation of the equi-frequency contours, and may open intriguing venues in dispersion engineering of electromagnetic metamaterials.

Keywords

metamaterials; transformation optics; spatial dispersion