Plasmonic nano-structures for opto-mechanical and sensing applications

L. Rosa (1) , G. Gervinskas (1) , E. Brasselet (2) , S. Juodkazis (1)

1 Centre for Micro-Photonics [Hawthorn]
2 LOMA - Laboratoire Ondes et Matière d'Aquitaine

We simulate the spectral properties of simple plasmonic nanoparticles (NPs), which we have fabricated with electron beam lithography (EBL) and lift-off, with or without nano-grooves milled by ion-beam lithography (IBL). We estimate the NP behaviour under laser illumination using 3D finite difference time domain (FDTD) simulations, showing that simple non-chiral NPs can generate torque from circularly polarized beams and emit optical vortices via spin-orbit coupling. We demonstrate numerically the position and intensity control of field enhancement hot-spots in chiral NPs illuminated by optical vortex, by combining spin/orbit momentum and NP chirality.

Domaines: Physique [physics]

L. Rosa, G. Gervinskas, E. Brasselet, S. Juodkazis. Plasmonic nano-structures for opto-mechanical and sensing applications. Conference on Optoelectronic and Microelectronic Materials and Devices (COMMAD), Dec 2012, Melbourne, VIC, Australia. pp.111-112, ⟨10.1109/COMMAD.2012.6472385⟩. ⟨hal-01555443⟩