Evanescent Gain in "Trapped Rainbow" Negative Refractive Index Heterostructures
Materials Science
2015-05-20 v1 Computational Physics
Optics
Abstract
We theoretically and numerically analyze a five-layer "trapped rainbow" waveguide made of a passive negative refractive index (NRI) core layer and gain strips in the cladding. Analytic transfer-matrix calculations and full-wave time-domain simulations are deployed to calculate, both in the frequency- and in the time-domain, the losses or gain experienced by complex-wavevector and complex-frequency modes. We find an excellent agreement between five distinct sets of results, all showing that the use of evanescent pumping (gain) can compensate the losses in the NRI slow-light regime.
Keywords
Cite
@article{arxiv.1010.5468,
title = {Evanescent Gain in "Trapped Rainbow" Negative Refractive Index Heterostructures},
author = {Edmund I. Kirby and Joachim M. Hamm and Tim Pickering and Kosmas L. Tsakmakidis and Ortwin Hess},
journal= {arXiv preprint arXiv:1010.5468},
year = {2015}
}