Trapping of a micro-bubble by non-paraxial Gaussian beam: computation using the FDTD method.
Optical forces on a micro-bubble were computed using the Finite Difference Time Domain method. Non-paraxial Gaussian beam equation was used to represent the incident laser with high numerical aperture, common in optical tweezers. The electromagnetic field distribution around a micro-bubble was computed using FDTD method and the electromagnetic stress tensor on the surface of a micro-bubble was used to compute the optical forces. By the analysis of the computational results, interesting relations between the radius of the circular trapping ring and the corresponding stability of the trap were found.
Sung
Seung-Yong
SY
Department of Mechatronics and Research Center for Biomolecular Nanotechnology,, Gwangju Institute of Science and Technology, 1 Oryong-dong, Buk-gu, Gwangju, 500-712, Korea
Lee
Yong-Gu
YG
D003198:Computer Simulation; D020342:Finite Element Analysis; D015233:Models, Statistical; D016011:Normal Distribution; D052898:Optical Tweezers