Plasmonic photo-current in freestanding monolayered gold nanoparticle membranes

Melanie Gauvin (1) , Thomas Alnasser (1) , E. Terver (1) , Inès Abid (2) , Adnen Mlayah (2) , S. Xie (3) , J. Brugger (3) , B. Viallet (1) , Laurence Ressier (1) , Jérémie Grisolia (1)

1 LPCNO - Laboratoire de physique et chimie des nano-objets
2 CEMES-NeO - Nano-Optique et Nanomatériaux pour l'optique
3 EPFL - Ecole Polytechnique Fédérale de Lausanne

We report on photo-current generation in freestanding monolayered gold nanoparticle membranes excited by using a focused laser beam. The absence of a substrate leads to a 50% increase of the photo-current at the surface plasmon resonance. This current is attributed to a combination of trap state dynamics and bolometric effects in a nanocomposite medium yielding a temperature rise of 40 K.

Mots clés: Laser beams; Metal nanoparticles; Nanoparticles; Plasmons; Surface plasmon resonance; Current generation; Focused laser beams; Gold Nanoparticles; Temperature rise; Trap state; Gold

Domaines: Physique [physics]; Chimie

Melanie Gauvin, Thomas Alnasser, E. Terver, Inès Abid, Adnen Mlayah, et al.. Plasmonic photo-current in freestanding monolayered gold nanoparticle membranes. Nanoscale, 2016, 8 (36), pp.16162-16167. ⟨10.1039/c6nr05091c⟩. ⟨hal-01764987⟩