Anisotropic Metamaterials Emulated by Tapered Waveguides
Tuesday, March 25, 2014 – 3:30pm
Towson University, Department of Physics and Astronomy
Current interest in electromagnetic metamaterials has been motivated to a large extent by the recent work on invisibility cloaking and transformation optics. This interest has been followed by considerable effort aimed at the introduction of metamaterial structures that could be realized experimentally. Unfortunately, it appears difficult to develop metamaterials with low losses and broadband performance. We demonstrate that metamaterial devices requiring anisotropic dielectric permittivity and magnetic permeability may be emulated by specially designed tapered waveguides. This approach leads to low-loss, broadband performance. Based on this technique, we demonstrate broadband electromagnetic cloaking in the visible frequency range, “trapped rainbow” effect and its potential application in spectroscopy on the chip, and birefringent transformation optics devices, which have different functionalities for mutually orthogonal polarizations of light.
REFRESHMENTS AT 3:20 PM IN REGENTS HALL 109