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Nanowire-type plasmonic waveguides as strong and tunable optical tweezers

Shu Yang

Department of Physics, School of Sciences, Beijing University of Posts and Telecommunications, Beijing 100876, China

E-mail Address: syang@bupt.edu.cn

Corresponding author.

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and

Kang Zhao

Department of Physics, School of Sciences, Beijing University of Posts and Telecommunications, Beijing 100876, China

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https://doi.org/10.1142/S0217984919500817Cited by:1 (Source: Crossref)

Abstract

A series of nanowire-type plasmonic waveguides are proposed. The mode properties of these waveguides and their dependences on various geometry parameters are studied. It is shown that they can generate deep subwavelength confinement and long-range propagation simultaneously. Moreover, the optical forces exerted on dielectric nanoparticles by these waveguides are calculated. It is found that the optical trapping forces are very strong, and that their distribution can be effectively regulated by certain geometry parameters. Using these features, strong and tunable near-field optical tweezers can be designed.

Keywords:

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