Propulsion of gold nanoparticles with surface plasmon polaritons: evidence of enhanced optical force from near-field coupling between gold particle and gold film.
We experimentally demonstrate the enhanced propulsion of gold nanoparticles by surface plasmon polaritons (SPPs). Three dimensional finite difference time domain (FDTD) simulations indicate considerably enhanced optical forces due to the field enhancement provided by SPPs and the near-field coupling between the gold particles and the film. This coupling is an important part of the enhanced propulsion phenomenon. Finally, the measured optical force is compared with that predicted by FDTD simulations and proven to be reasonable.
Wang
Kai
K
School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02138, USA.
Schonbrun
Ethan
E
Crozier
Kenneth B
KB
D003198:Computer Simulation; D005898:Glass / Q000737:chemistry; D006046:Gold / Q000737:chemistry*; D053758:Nanoparticles / Q000737:chemistry*; D055095:Optics and Photonics; D020349:Surface Plasmon Resonance; D013499:Surface Properties; D014867:Water / Q000737:chemistry
D014867:Water; D006046:Gold