Stable trapping and manually controlled rotation of an asymmetric or birefringent microparticle using dual-mode split-beam optical tweezers

Optics Express
Fang-Wen SheuChyung Ay

Abstract

Inserting a coverslip into half of a Gaussian laser beam at a suitable tilting angle can make the single-mode laser beam become closely spaced dual light spots at the laser focus. In this way, we can reform the conventional single-beam optical tweezers easily and construct a set of dual-mode split-beam optical tweezers, which can be used to manually rotate a trapped and twisted red blood cell around the optical axis. Furthermore, we demonstrate that the split-beam optical tweezers can also stably trap and orient a birefringent polystyrene micro strip particle, which otherwise will self rotate at a varying speed along the structural principal axes, fast spin about the optical axis in a tilting pose, or precess like a gyroscope, in the original linearly polarized single-beam optical tweezers.

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Citations

May 23, 2015·IEEE Transactions on Bio-medical Engineering·Zenan WangWei Tech Ang
Jun 26, 2007·Methods in Cell Biology·Timo A NieminenHalina Rubinsztein-Dunlop
Dec 18, 2010·Optics Express·Paul B Bareil, Yunlong Sheng
Sep 15, 2015·Journal of the Optical Society of America. A, Optics, Image Science, and Vision·Huachao Yu, Weilong She
Aug 10, 2012·Biomedical Optics Express·Peng ZhangZhigang Chen
Nov 10, 2020·Biomicrofluidics·Hiroyuki HaradaHiroaki Ito
Apr 7, 2021·Biochemical and Biophysical Research Communications·Shaimaa M MohiAsaad A Khalaf
Nov 14, 2021·Journal of Biophotonics·Yanzheng Xie, Xiaoshuai Liu

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