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Proceedings Paper

Study of angular and position stability in optical trap of a nanorod
Author(s): Paul B. Bareil; Yunlong Sheng
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Paper Abstract

We computed the optical field scattered by a nanorod with the T-matrix approach and then the optical force and torque by the Maxwell stress tensor. Surface stress integration over the nanorod surface, including the side, top and bottom ends of the nanorod, has been performed to obtain the stresses on each section of the nanorod in order to understand the trap mechanism. The torque caused by beam orbital momentum has also been analyzed. The trap stability against the shift in position and orientation of the nanorod due to the natural Brownian motion are studied via computing the gradients of the optical force as a function of the size, length and tilt angle of the nanorod and the beam numerical aperture.

Paper Details

Date Published: 27 August 2010
PDF: 8 pages
Proc. SPIE 7762, Optical Trapping and Optical Micromanipulation VII, 77621A (27 August 2010); doi: 10.1117/12.860543
Show Author Affiliations
Paul B. Bareil, Univ. Laval (Canada)
Yunlong Sheng, Univ. Laval (Canada)

Published in SPIE Proceedings Vol. 7762:
Optical Trapping and Optical Micromanipulation VII
Kishan Dholakia; Gabriel C. Spalding, Editor(s)

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