See a list of publications below or visit the Photonics academic staff page and click on a particular member of staff to access their personal web page, which includes a list of their own publications.
@article{McCall:2016:4/044017,
author = {McCall, MW and Kinsler, P and Topf, RDM},
doi = {4/044017},
journal = {Journal of Optics},
title = {The refractive index of reciprocal electromagnetic media},
url = {http://dx.doi.org/10.1088/2040-8978/18/4/044017},
volume = {18},
year = {2016}
}
TY - JOUR
AB - We study the electromagnetics of media described by identical inhomogeneous relative dielectric and magnetic tensors, ${\boldsymbol{\epsilon }}={\boldsymbol{\mu }}.$ Such media occur generically as spatial transformation media, i.e. electromagnetic media that are defined by a deformation of space. We show that such media are completely described by a refractive index $n({\bf{r}},\hat{{\bf{s}}})$ that depends on position ${\bf{r}}$ and direction $\hat{{\bf{s}}},$ but is independent of polarization. The phase surface is always ellipsoidal, and $n({\bf{r}},\hat{{\bf{s}}})$ is therefore represented by the radius vector to the surface of the ellipsoid. We apply our method to calculate the angular dependence of the refractive index in the well-studied cylindrical cloak and to a new kind of structurally chiral medium induced by a twist deformation. By way of a simple example we also show that media for which ${\boldsymbol{\epsilon }}={\boldsymbol{\mu }}$ do not in general preserve the impedance properties of vacuum. The implications of this somewhat surprising conclusion for the field of transformation optics are discussed.
AU - McCall,MW
AU - Kinsler,P
AU - Topf,RDM
DO - 4/044017
PY - 2016///
SN - 2040-8978
TI - The refractive index of reciprocal electromagnetic media
T2 - Journal of Optics
UR - http://dx.doi.org/10.1088/2040-8978/18/4/044017
UR - http://hdl.handle.net/10044/1/33628
VL - 18
ER -