This article is cited in 11 papers

Nanooptics

Optical forces in plasmonic nanoantennas

A. S. Shalin^ab, S. V. Sukhov<sup>c

a</sup> Ulyanovsk State University
^b Ul'yanovsk Branch of Institute of Radioengineering and Electronics, Russian Academy of Sciences
^c CREOL, The College of Optics and Photonics, University of Central Florida

Abstract: The optical forces acting on nanoparticles in V-shaped plasmonic resonators with a high local-field gain have been investigated. Two versions are considered, which make it possible to implement either attractive or repulsive gradient optical forces. A plasmonic resonator is proposed, which can focus 350-nm radiation and implement a repulsive gradient force. It has been shown for the first time that a perturbation induced by a nanoparticle redistributes the field in the resonator so that additional intensity peaks arise in both versions to hold the nanoparticle in the resonator by forming an optical trap.

Keywords: nanoantenna, plasmonic resonator, optical force, optical trap, nanoparticle.

PACS: 42.50.Wk, 87.80.Cc, 61.46.-w

Received: 13.10.2011

 English version: Quantum Electronics, 2012, 42:4, 355–360

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