Title :
Focal Pattern of Hyperbolic-Cosine-Gaussian Beam with Optical Vortex
Author :
Gao, Xiumin ; Zhan, Qiufang ; Li, Jinsong ; Wang, Jian ; Zhuang, Songlin
Author_Institution :
Electron. & Inf. Coll., Hangzhou Dianzi Univ., Hangzhou, China
Abstract :
Intensity distribution in focal region plays an important role in many optical systems, including optical tweezers, imaging system, and analysis instrument. The focal pattern of the hyperbolic-cosine-Gaussian beam with vortex was investigated theoretically in this article. The vortex includes one non-spiral vortex created by linear phase plate, and one spiral vortex created by spiral phase plate. By adjusting the parameters of the vortex, focal pattern evolves considerably, and some novel focal patterns may come into being, such as focal ring, two-peak pattern, four-peak pattern, which may be used to construct optical traps.
Keywords :
Gaussian distribution; optical vortices; radiation pressure; focal pattern; four-peak pattern; hyperbolic-cosine-Gaussian beam; linear phase plate; nonspiral vortex; optical traps; optical tweezers; optical vortex; spiral phase plate; spiral vortex; two-peak pattern; Charge carrier processes; Educational institutions; Holographic optical components; Holography; Laser beams; Optical beams; Optical microscopy; Optical scattering; Optical vortices; Spirals;
Conference_Titel :
Biomedical Engineering and Informatics, 2009. BMEI '09. 2nd International Conference on
Conference_Location :
Tianjin
Print_ISBN :
978-1-4244-4132-7
Electronic_ISBN :
978-1-4244-4134-1
DOI :
10.1109/BMEI.2009.5305823
