Study of angular and position stability in optical trap of a nanorod

Paul B. Bareil; Yunlong Sheng

doi:10.1117/12.860543

27 August 2010 Study of angular and position stability in optical trap of a nanorod

Paul B. Bareil, Yunlong Sheng

Proceedings Volume 7762, Optical Trapping and Optical Micromanipulation VII; 77621A (2010) https://doi.org/10.1117/12.860543
Event: SPIE NanoScience + Engineering, 2010, San Diego, California, United States

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.

Citation Download Citation

Paul B. Bareil and Yunlong Sheng "Study of angular and position stability in optical trap of a nanorod", Proc. SPIE 7762, Optical Trapping and Optical Micromanipulation VII, 77621A (27 August 2010); https://doi.org/10.1117/12.860543

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