Determinant role of size-dependent electron relaxation processes in the nonlinear luminescence emission of resonantly excited gold nanorods

Celine Molinaro (1) , Sylvie Marguet (2) , Ludovic Douillard (1) , Fabrice Charra (1) , Céline Fiorini-Debuisschert (1)

1 LEPO - Laboratoire d'Electronique et nanoPhotonique Organique
2 LEDNA - Laboratoire Edifices Nanométriques

The two-photon luminescence (TPL) of gold nanoparticles (NP) was shown to result from the excitation of hot carriers, the plasmonic NP resonances playing an important role both for plasmon enhanced absorption and plasmon enhanced emission. However, the exact parameters enabling to control or optimize the NP nonlinear luminescence still need to be understood in detail. In this paper, we report the two-photon excited photoluminescence of single gold nanorods exhibiting identical aspect ratio (close to 4) and thus identical plasmonic resonances, but increasing volumes V (707

Keywords: field enhancement; BEM (Boundary Elements Method) simulations; Gold nanorod; plasmon; hot electrons; two-photon luminescence

Domains: Chemical Sciences; Material chemistry; Physics [physics]; Physics [physics]; Optics [physics.optics]

Celine Molinaro, Sylvie Marguet, Ludovic Douillard, Fabrice Charra, Céline Fiorini-Debuisschert. Determinant role of size-dependent electron relaxation processes in the nonlinear luminescence emission of resonantly excited gold nanorods. 2019. ⟨cea-02362275⟩