Singularity-driven Second and Third Harmonic Generation in a {\epsilon}-near-zero nanolayer
Optics
2013-05-29 v2
Abstract
We show a new path to {\epsilon}~0 materials without resorting to metal-based metamaterial composites. A medium that can be modeled using Lorentz oscillators usually displays {\epsilon}=0 crossing points, e.g. {\epsilon}=0 at {\lambda}~7{\mu}m and 20{\mu}m for SiO2 and CaF2, respectively. We show that a Lorentz medium yields a singularity-driven enhancement of the electric field followed by dramatic lowering of thresholds for a plethora of nonlinear optical phenomena. We illustrate the remarkable enhancement of second and third harmonic generation in a layer of {\epsilon}~0 material 20nm thick, and discuss the role of nonlinear surface sources.
Keywords
Cite
@article{arxiv.1107.2354,
title = {Singularity-driven Second and Third Harmonic Generation in a {\epsilon}-near-zero nanolayer},
author = {M. A. Vincenti and D. de Ceglia and A. Ciattoni and M. Scalora},
journal= {arXiv preprint arXiv:1107.2354},
year = {2013}
}