META 2021, META'12

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Nonlocal Transformation-Optics Metamaterials
Giuseppe Castaldi, Vincenzo Galdi, Andrea Alù, Nader Engheta

Last modified: 2012-01-04


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.


metamaterials; transformation optics; spatial dispersion