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.
Plasmonic nano-structures for opto-mechanical and sensing applications / Rosa, Lorenzo; Gervinskas, G.; Brasselet, E.; Juodkazis, S.. - (2012), pp. 6472385.111-6472385.112. (Intervento presentato al convegno 2012 Conference on Optoelectronic and Microelectronic Materials and Devices, COMMAD 2012 tenutosi a Melbourne, VIC, aus nel 14 - 16 dicembre) [10.1109/COMMAD.2012.6472385].
Plasmonic nano-structures for opto-mechanical and sensing applications
ROSA, Lorenzo;
2012
Abstract
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.
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