Demonstration of a plasmonic nonlinear pseudo-diode
Abstract
We demonstrate a nonlinear plasmonic metasurface that exhibits strongly asymmetric second-harmonic generation: nonlinear scattering is efficient upon excitation in one direction and it is substantially suppressed when the excitation direction is reversed, thus enabling a diode-like functionality. A significant (approximately 10 dB) extinction ratio of SHG upon opposite excitations is measured experimentally and those findings are substantiated with full-wave simulations. The combination of two commonly used metals - aluminium and silver - produces a material composition asymmetry that results into a bianisotropic response of the system, as confirmed by performing homogenization analysis and extracting an effective susceptibility tensor. Finally, we discuss the implications of our results from the more fundamental perspectives of reciprocity and time-reversal asymmetry.
Cite
@article{arxiv.2302.03409,
title = {Demonstration of a plasmonic nonlinear pseudo-diode},
author = {Sergejs Boroviks and Andrei Kiselev and Karim Achouri and Olivier J. F. Martin},
journal= {arXiv preprint arXiv:2302.03409},
year = {2024}
}
Comments
7 pages, 4 figures in the main text; 4 pages and 6 figures in the supporting information