Open AccessTrapping of a micro-bubble by non-paraxial Gaussian beam: computation using the FDTD method
Author(s) -
Seung-Yong Sung,
Yong-Gu Lee
Publication year - 2008
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.16.003463
Subject(s) - finite difference time domain method , optical tweezers , paraxial approximation , optics , gaussian beam , physics , optical force , electromagnetic field , numerical aperture , bubble , beam (structure) , radius , geometrical optics , aperture (computer memory) , mechanics , quantum mechanics , wavelength , computer security , computer science , acoustics
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.