Optimization of second-harmonic generation from touching plasmonic wires
Abstract
We employ transformation optics to optimize the generic nonlinear wave interaction of second-harmonic generation from a pair of touching metallic wires. We demonstrate a 10 orders of magnitude increase in the second-harmonic scattering cross-section by increasing the background permittivity and a 5 orders of magnitude increase in efficiency with respect to a single wire. These results have clear implications for the design of nanostructured metallic frequency-conversion devices. Finally, we exploit our analytic solution of a non-trivial nanophotonic geometry as a platform for performing a critical comparison of the strengths, weaknesses and validity of other prevailing theoretical approaches previously employed for nonlinear wave interactions at the nanoscale.
Cite
@article{arxiv.2011.05640,
title = {Optimization of second-harmonic generation from touching plasmonic wires},
author = {Shimon Elkabetz and K. Nireekshan Reddy and Parry Y. Chen and Antonio I. Fern andez-Domnguez and Yonatan Sivan},
journal= {arXiv preprint arXiv:2011.05640},
year = {2021}
}