3D nano-structures for laser nano-manipulation

Gediminas Seniutinas (1, 2) , Lorenzo Rosa (1, 2) , Gediminas Gervinskas (1, 2) , Etienne Brasselet (3) , Saulius Juodkazis (1, 2)

1 Centre for Micro-Photonics
2 ANFF - The Australian National Fabrication Facility
3 LOMA - Laboratoire Ondes et Matière d'Aquitaine

The resputtering of gold films from nano-holes defined in a sacrificial PMMA mask, which was made by electron beam lithography, was carried out with a dry plasma etching tool in order to form well-like structures with a high aspect ratio (height/width ≈ 3-4) at the rims of the nano-holes. The extraordinary transmission through the patterns of such nano-wells was investigated experimentally and numerically. By doing numerical simulations of 50-nm and 100-nm diameter polystyrene beads in water and air, we show the potential of such patterns for self-induced back-action (SIBA) trapping. The best trapping conditions were found to be a trapping force of 2 pN/W/μm2 (numerical result) exerted on a 50-nm diameter bead in water. The simulations were based on the analytical Lorentz force model.,

Mots clés: optical tweezing; near field; extraordinary transmission; plasmonics; relative ion etching; self-induced back-action

Domaines: Optique [physics.optics]

Gediminas Seniutinas, Lorenzo Rosa, Gediminas Gervinskas, Etienne Brasselet, Saulius Juodkazis. 3D nano-structures for laser nano-manipulation. Beilstein Journal of Nanotechnology, 2013, 4, pp.534-541. ⟨10.3762/bjnano.4.62⟩. ⟨hal-00874431⟩