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

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

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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.

Original languageEnglish
Title of host publicationOptical Trapping and Optical Micromanipulation VII
DOIs
StatePublished - 27 Oct 2010
EventOptical Trapping and Optical Micromanipulation VII - San Diego, CA, United States
Duration: 1 Aug 20105 Aug 2010

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume7762
ISSN (Print)0277-786X

Conference

ConferenceOptical Trapping and Optical Micromanipulation VII
CountryUnited States
CitySan Diego, CA
Period1/08/105/08/10

Keywords

  • Donut-shaped beam
  • Optical tweezers
  • Spring constant

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    Tsai, C. L., Huang, H. P., Hsu, L., & Hsu, K-Y. (2010). An easier way to improvement the trapping performance of optical tweezers by donut-shaped beam. In Optical Trapping and Optical Micromanipulation VII [776230] (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 7762). https://doi.org/10.1117/12.860308