Plasmonic nano-structures for opto-mechanical and sensing applications

Author

Rosa, L.S. ; Gervinskas, G. ; Brasselet, E. ; Juodkazis, Saulius

Author_Institution

Centre for Micro-Photonics, Swinburne Univ. of Technol., Hawthorn, VIC, Australia

fYear

2012

fDate

12-14 Dec. 2012

Firstpage

111

Lastpage

112

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.

Keywords

electron beam lithography; finite difference time-domain analysis; nanofabrication; nanolithography; nanoparticles; nanosensors; plasmonics; 3D FDTD simulations; 3D finite difference time domain simulations; EBL; circularly polarized beams; electron beam lithography; field enhancement hot-spot intensity control; field enhancement hot-spot position control; ion-beam lithography; nanogrooves; nonchiral NP; optical vortex; optical vortices; optomechanical applications; plasmonic NP spectral properties; plasmonic nanoparticle spectral properties; plasmonic nanostructures; sensing applications; spin-orbit coupling; spin-orbit momentum; Glass; Gold; Laser beams; Nanoparticles; Optical vortices; Plasmons; Torque;

fLanguage

English

Publisher

ieee

Conference_Titel

Optoelectronic and Microelectronic Materials & Devices (COMMAD), 2012 Conference on

Conference_Location

Melbourne, VIC

ISSN

1097-2137

Print_ISBN

978-1-4673-3047-3

Type

conf

DOI

10.1109/COMMAD.2012.6472385

Filename

6472385