Interplay between gain and loss in arrays of nonlinear plasmonic nanoparticles: toward parametric downconversion and amplification

Syed A. Shah, Michael R. Clark, Joseph Zyss, Maxim Sukharev, Andrei Piryatinski

Research output: Contribution to journalReview articlepeer-review

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.

Original languageEnglish (US)
Pages (from-to)1680-1683
Number of pages4
JournalOptics Letters
Volume49
Issue number7
DOIs
StatePublished - Apr 1 2024

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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