Phase matched backward-wave second harmonic generation in a hyperbolic carbon nanoforest
Abstract
We show that deliberately engineered spatially dispersive metamaterial slab can enable co-existence and phase matching of contra-propagating ordinary fundamental and backward second harmonic electromagnetic modes. Energy flux and phase velocity are contra-directed in backward waves which determines extraordinary nonlinear-optical propagation processes. Frequencies, phase and group velocities, as well as nanowavequide losses inherent to the electromagnetic modes supported by the metamaterial can be tailored to optimize nonlinear-optical conversion of frequencies and propagation directions of the coupled waves. Such a possibility, which is of paramount importance for nonlinear photonics, is proved with numerical model of the hyperbolic metamaterial made of carbon nanotubes standing on metal surface. Extraordinary properties of backward-wave second harmonic in the THz and IR propagating in the reflection direction are investigated with focus on pulsed regime.
Cite
@article{arxiv.1602.02497,
title = {Phase matched backward-wave second harmonic generation in a hyperbolic carbon nanoforest},
author = {A. K. Popov and I. S. Nefedov and S. A. Myslivets},
journal= {arXiv preprint arXiv:1602.02497},
year = {2016}
}
Comments
11 pages, 10 figures