Orbital analysis of single nanoparticle in-plane motion driven by an optical vortex

Kichitaro Nakajima; Tempei Tsujimura; Kentaro Doi; Satoyuki Kawano

doi:10.1117/12.2573779

15 June 2020 Orbital analysis of single nanoparticle in-plane motion driven by an optical vortex

Kichitaro Nakajima, Tempei Tsujimura, Kentaro Doi, Satoyuki Kawano

Proceedings Volume 11522, Optical Manipulation and Structured Materials Conference 2020; 115220O (2020) https://doi.org/10.1117/12.2573779
Event: SPIE Technologies and Applications of Structured Light, 2020, Yokohama, Japan

Abstract

Quantitative evaluation of optical forces on nanoscale objects caused by optical vortices is significant for application of optical vortex to nanotechnology. In this study, we analyze an orbital motion of single gold nanoparticles with a diameter of 150 nm driven by the Laguerre-Gaussian beam. A nanofluidic channel with a height of 300 nm is used to confine the orbital motion into two-dimensional plane by restricting their Brownian motion perpendicular to a focal plane of objective lens, resulting in the visualization by dark-field microscopy. A particle tracking analysis of the acquired images allows the quantitative evaluation of optical forces, such as trapping stiffness and driving force of the orbital motion, and show a reasonable agreement with a theoretical estimation.

Citation Download Citation

Kichitaro Nakajima, Tempei Tsujimura, Kentaro Doi, and Satoyuki Kawano "Orbital analysis of single nanoparticle in-plane motion driven by an optical vortex", Proc. SPIE 11522, Optical Manipulation and Structured Materials Conference 2020, 115220O (15 June 2020); https://doi.org/10.1117/12.2573779

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KEYWORDS

Particles

Nanoparticles

Motion analysis

Gold

Optical vortices

Visualization

Objectives

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