Pure Nonlinear Optical Response in Plasmonic Nanoantennas

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

In this talk, we present our study of a nonlinear optical effect distinct from current theory foresees [1]. To prove our claim, we have measured the SHG from arrays of gold-silver heterodimers and silver and gold homodimers such as the one shown in Fig 1(a). Our sample's unique feature is its size, which is smaller than the electromagnetic penetration depth in the respective metals - see the scale bar for comparison. The interaction, therefore, is highly dipolar, and thus nonexistent SHG should emerge. Non the less, What Fig 1(b) shows is that the Au-Ag nanoantenna produces substantial SHG while the Au-Au and Ag-Ag are negligible, as expected. Full-wave simulation of our samples, as shown in Fig. 1(c) , takes into account all known plasmonic confinement and enhancement effect, such as localized plasmons [2] , multimode interactions [3] , [4] , hybridization [5] , [6] , gap plasmons [7] , cascaded plasmons [8] , multipolar effects [9] , and silencing [10]. The simulation predicts little to none SHG for all material combinations in this case, with the topmost SHG from the Ag-Ag structure and without the experimental spectral peak. It is clear, therefore, that our results are beyond the conventional theory embedded in the simulation.

Original languageEnglish
Title of host publication2021 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference, CLEO/Europe-EQEC 2021
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781665418768
DOIs
StatePublished - 1 Jun 2021
Event2021 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference, CLEO/Europe-EQEC 2021 - Munich, Germany
Duration: 21 Jun 202125 Jun 2021

Publication series

Name2021 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference, CLEO/Europe-EQEC 2021

Conference

Conference2021 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference, CLEO/Europe-EQEC 2021
Country/TerritoryGermany
CityMunich
Period21/06/2125/06/21

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