The analysis of the optical trap force in a single optical trap based on MATLAB

TAN Ai-ling; ZHAO Yong; SHI Jing-shan

Under the approximation of geometric optics,the axial force exerted on the Mie microsphere particles is simulated.The capture range and the curves of simulation are shown.The results show that decreasing focus spot radius leads to deeper optical traps and that relative refractive index,laser wavelength and power also have some effect on optical trap,which give some reliance on choosing parameters in experiments.

1. Electricity Institute, Yanshan University, Qinhuangdao 066004, China

Received Date: 2003-09-24

Accepted Date: 2003-12-02

Available Online: 2004-07-25

Abstract: Under the approximation of geometric optics,the axial force exerted on the Mie microsphere particles is simulated.The capture range and the curves of simulation are shown.The results show that decreasing focus spot radius leads to deeper optical traps and that relative refractive index,laser wavelength and power also have some effect on optical trap,which give some reliance on choosing parameters in experiments.

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Reference (9)

[1]	ASHKIN A,DZIEDZIC J M,BJORKHOLM J E et al.Observation of a single-beam gradient force optical trap for dielectrical particles [J].Opt Lett,1986,11:288～290.
[2]	ASHKIN A,SCHUTZE K,DZIEDZIC J M et al.Force generation of organelle transport measured in vivio by an infrared laser trap [J].Nature,1990,348:346～348.
[3]	ASHKIN A.Forces of a single-beam gradiant laser trap on a dielectric sphere in the ray optics regime [J].Biophysical Journal,1992,61:569～582.
[4]	BAKKER S T C,HESSELINK G,GROOTH B G et al.Experimental and thoretical investigations on the vadility of the geometrical optics model for calculating the stability of optical traps [J].Cytometry,1991,12:479～485.
[5]	FELGNER H,MYKKER O,SCHLIWA M.Calibration of lightforces in optical tweezers [J].Appl Opt,1995,34:977～982.
[6]	SIMMONS R M,FINER J T,CHU S et al.Quantitative measurements of force and displance using an optical trap [J].Biophysical Journal,1996,70:1813～1822.
[7]	GU M,KE P C,GAN X S.Trapping force by a high numerical-aperture microscope objective obeying the sine condition [J].Rev Sci Instrum,1997,68:3666～3668.
[8]	GAUTHIER R C,ASHMAN M.Simulated dynamic behaviour ofsingle and multiple spheres in the trap region of focused laser beams [J].Appl Opt,1998,37:6421～6431.
[9]	姚新程,李兆霖,程丙英 et al.双层介质球体所受光作用力的分析与计算 [J].光学学报,2000,20:1305～1310.

The analysis of the optical trap force in a single optical trap based on MATLAB

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