Sum-Frequency and Second-Harmonic Generation from Plasmonic Nonlinear Nanoantennas
Abstract
Plasmonic nanostructures that support surface plasmon (SP) resonance potentially provide a route for the development of nanoengineered nonlinear optical devices. In this work, second-order nonlinear light scattering, specifically sum-frequency generation (SFG) and second-harmonic generation (SHG), from plasmonic nanoantennas is modeled by the boundary element method (BEM). Far-field scattering patterns are compared with the results calculated by the Mie theory to validate the accuracy of the developed nonlinear solver. The SFG from a multi-resonant nanoantenna (MR-NA) and the SHG from a particle-in-cavity nanoantenna (PIC-NA) are analyzed by using the developed method. Enhancements of the scattering signals due to double-resonance of the MR-NA and gap plasmonic mode of the PIC-NA are observed. Unidirectional nonlinear radiation for the PIC-NA is realized. Moreover, its emission direction can be controlled by the location of the nanosphere. This work provides new theoretical tools and design guidelines for plasmonic nonlinear nanoantennas.
Cite
@article{arxiv.1612.05904,
title = {Sum-Frequency and Second-Harmonic Generation from Plasmonic Nonlinear Nanoantennas},
author = {Xiaoyan Y. Z. Xiong and Li Jun Jiang and Wei E. I. Sha and Yat Hei Lo and Weng Cho Chew},
journal= {arXiv preprint arXiv:1612.05904},
year = {2016}
}