Abstract Trapping force was calculated with a homogeneous dielectric sphere model. Results indicate that the transverse trapping force of optical tweezers can be increased effectively through modifying laser beam profile while the axial stability of the system is still assured. This is quite important when optical tweezers are applied to the precise measurements for single biological molecule.
Received: 10 August 1999
Accepted manuscript online:
PACS:
37.10.Vz
(Mechanical effects of light on atoms, molecules, and ions)
(Beam characteristics: profile, intensity, and power; spatial pattern formation)
Fund: Project supported by the National Natural Science Foundation of China (Grant No. 1989380).
Cite this article:
Yao Xin-cheng (姚新程), Li Zhao-lin (李兆霖), Cheng Bing-ying (程丙英), Han Xue-hai (韩学海), Zhang Dao-zhong (张道中) INCREASING TRANSVERSE STABILITY OF OPTICAL TWEEZERS BY USING DUAL-GAUSSIAN BEAM PROFILE 2000 Chinese Physics 9 65
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