Optimization of second-harmonic generation from touching plasmonic wires

Shimon Elkabetz, K. Nireekshan Reddy, Parry Y. Chen, Antonio I. Fernández-Domínguez, Yonatan Sivan

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

We employ transformation optics to optimize the generic nonlinear wave interaction of second-harmonic generation (SHG) from a pair of touching metallic wires. We demonstrate a six orders of magnitude increase in efficiency with respect to SHG from a single wire, and a ten orders of magnitude increase in the second-harmonic scattered power by increasing the background permittivity. These results have clear implications for the design of nanostructured metallic frequency-conversion devices. Finally, we exploit our analytic solution of a nontrivial 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.

Original languageEnglish
Article number075411
JournalPhysical Review B
Volume103
Issue number7
DOIs
StatePublished - 8 Feb 2021

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