Abstract

In this paper, the optical force between two circular plasmonic wires of submicrometer diameter (0.3 μm) with nanometer surface-to-surface distances (3–30 nm) interacting with radiation of a complex point source ($\lambda \approx 0.2$ μm) is numerically studied. Calculations (which are based on the Müller integral equations and the Maxwell stress tensor) show that an attractive optical force with a number of distinct peaks is created in distances 3–10 nm. However, for plasmonic–dielectric and plasmonic–reflector double-wires, the optical force has no such peaks. Comparisons reveal that the peaks are originated from the excitation of coupled surface plasmon polaritons in the gap region between the plasmonic wires.

© 2017 Optical Society of America

Optical forces in coupled plasmonic nanosystems: Near field and far field interaction regimes

Élodie Lamothe, Gaëtan Lévêque, and Olivier J. F. Martin
Opt. Express 15(15) 9631-9644 (2007)

Wavelength-dependent optical force on elliptical silver cylinders at plasmon resonance

Carsten Rockstuhl and Hans Peter Herzig
Opt. Lett. 29(18) 2181-2183 (2004)

Optical forces on small particles: attractive and repulsive nature and plasmon-resonance conditions

J. R. Arias-González and M. Nieto-Vesperinas
J. Opt. Soc. Am. A 20(7) 1201-1209 (2003)

The forces from coupled surface plasmon polaritons in planar waveguides

David Woolf, Marko Loncar, and Federico Capasso
Opt. Express 17(22) 19996-20011 (2009)

Modified method for computing the optical force of the plasmonics nanoparticle from the Maxwell stress tensor

Dong Wang, Jun Song, Maozhen Xiong, Guangsheng Wang, Xiao Peng, and Junle Qu
J. Opt. Soc. Am. B 34(1) 178-182 (2017)