An easier way to improve the trapping performance of optical tweezers by donut-shaped beam

Che-Liang Tsai; Hang-Ping Huang; Long Hsu; Ken-Yuh Hsu

doi:10.1117/12.860308

27 August 2010 An easier way to improve the trapping performance of optical tweezers by donut-shaped beam

Che-Liang Tsai, Hang-Ping Huang, Long Hsu, Ken-Yuh Hsu

Proceedings Volume 7762, Optical Trapping and Optical Micromanipulation VII; 776230 (2010) https://doi.org/10.1117/12.860308
Event: SPIE NanoScience + Engineering, 2010, San Diego, California, United States

Abstract

In optical tweezers, it can be comprehended that the larger the inclination angle between the condensed laser beam and the optical axis contributes more to axial trapping force, while the central part of laser beam with smaller inclination angle contributes more transverse trapping force. Therefore donut-shaped beam is used to improve the problem of lessaxial trapping for common optical tweezers. Some research reports have shown that the efficiency of a trapping force can be enhanced by using a donut-shaped beam. In this paper we present the dependence of the axial and the transverse components of a trapping force on the configuration of a focused donut-shaped beam. The simulation result will provide a simple and easy guide for optical tweezers users to adjust the configuration of a focused donut-shaped beam for optimal trapping performance.

Citation Download Citation

Che-Liang Tsai, Hang-Ping Huang, Long Hsu, and Ken-Yuh Hsu "An easier way to improve the trapping performance of optical tweezers by donut-shaped beam", Proc. SPIE 7762, Optical Trapping and Optical Micromanipulation VII, 776230 (27 August 2010); https://doi.org/10.1117/12.860308

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KEYWORDS

Optical tweezers

Particles

Optical simulations

Laser scattering

Scattering

Objectives

Optical trapping

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