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Journal Articles Optics Express Year : 2022

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

Abstract

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.
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Dates and versions

hal-03782018 , version 1 (22-09-2022)

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Florian Dell’ova, Diana Shakirova, Yoann Brûlé, Laureen Moreaud, Gérard Colas Des Francs, et al.. Coherent two-beam steering of delocalized nonlinear photoluminescence in a plasmon cavity. Optics Express, 2022, 30 (10), pp.17517-17528. ⟨10.1364/OE.456599⟩. ⟨hal-03782018⟩
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