Coherent two-beam steering of delocalized nonlinear photoluminescence in a plasmon cavity.

Date publication

mai 2022

Journal

Optics express

Auteurs

Membres identifiés du Cancéropôle Est :
Dr DUJARDIN Erik

Tous les auteurs :
Dell'Ova F, Shakirova D, Brulé Y, Moreaud L, Colas-des-Francs G, Dujardin E, Bouhelier A

Lien Pubmed

https://www.ncbi.nlm.nih.gov/pubmed/36221572

Résumé

We aim at controlling the spatial distribution of nonlinear photoluminescence in a shaped micrometer-size crystalline gold flake. Interestingly, the underlying surface plasmon modal landscape sustained by this mesoscopic structure can be advantageously used to generate nonlinear photoluminescence (nPL) in remote locations away from the excitation spot. By controlling the modal pattern, we show that the delocalized nonlinear photoluminescence intensity can be redistributed spatially. This is first accomplished by changing the polarization orientation of the pulsed laser excitation in order to select a subset of available surface plasmon modes within a continuum. We then propose a second approach to redistribute the nPL within the structure by implementing a phase control of the plasmon interference pattern arising from a coherent two-beam excitation. Control and engineering of the nonlinear photoluminescence spatial extension is a prerequisite for deploying the next generation of plasmonic-enabled integrated devices relying on hot carriers.

Référence

Opt Express. 2022 05 9;30(10):17517-17528