Abstract

With the help of a theoretical model and finite-difference time-domain (FDTD) simulations based on the hydrodynamic–Maxwell model, we examine the effect of difference-frequency generation (DFG) in an array of L-shaped metal nanoparticles (MNPs) characterized by intrinsic plasmonic nonlinearity. The outcomes of the calculations reveal the spectral interplay between gain and loss in the vicinity of the fundamental frequency of the localized surface plasmon resonances. Subsequently, we identify different array thicknesses and pumping regimes facilitating parametric amplification and spontaneous parametric downconversion. Our results suggest that the parametric amplification regime becomes feasible on a scale of hundreds of nanometers and spontaneous parametric downconversion on the scale of tens of nanometers, opening up new exciting opportunities for developing building blocks of photonic metasurfaces.

© 2024 Optica Publishing Group

External chirality enhancing downconversion in a waveguide-coupled nonlinear plasmonic metasurface

Tsafrir Abir, Symeon Sideris, and Tal Ellenbogen
Opt. Lett. 49(5) 1241-1244 (2024)

Unidirectional ring laser operation and tunable single-frequency emission using differential parametric gain

O. B. Jensen, M. Helmark, A. G. Urskov, and P. Tidemand-Lichtenberg
Opt. Lett. 49(2) 407-410 (2024)

Surface recoil force on dielectric nanoparticle enhancement via graphene acoustic surface plasmon excitation: non-local effect consideration

Julieta Olivo, Hernan Ferrari, and Mauro Cuevas
Opt. Lett. 49(5) 1249-1252 (2024)

Optical nanoimaging of laser-switched phase-change plasmonic infrared antennas

Qiyu Chen, Dunzhu Lu, Tianwei Qin, Xiao Luo, Ming Xu, and Peining Li
Opt. Lett. 49(4) 1021-1024 (2024)

Coupled air lasing gain and Mie scattering loss: an aerosol effect in filament-induced plasma spectroscopy

Jiayun Xue, Zhi Zhang, Yuezheng Wang, Binpeng Shang, Jiewei Guo, Shishi Tao, Nan Zhang, Lanjun Guo, Pengfei Qi, Lie Lin, and Weiwei Liu
Opt. Lett. 49(3) 550-553 (2024)