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The focusing performance of a radially polarized beam
Jie Lin * #,Jian Guan,Peng Jin
Department of Automation Measurement and Control Engineering, Harbin Institute of Technology, Harbin 150080
*Correspondence author
#Submitted by
Subject: Optics
Funding: none
Opened online:15 January 2014
Accepted by: none
Citation: Jie Lin,Jian Guan,Peng Jin.The focusing performance of a radially polarized beam[OL]. [15 January 2014] http://www.paper.edu.cn/lwzx/en_releasepaper/content/4580237
The focusing performance of a radially polarized beams, which are Bessel-Gaussian, Sinh-Gaussian and hollow Gaussian beam, focused by lens with high numerical aperture are investigated based on Debye integral. The maximal intensity shifts from focal spot and the lateral resolution are explored. The effect of parameters of Bessel-Gaussian beam on the achievement of optical needle is also explored. Meanwhile, beam quality and size of focusing spot is achieved for incident sinh-Gaussian beam with large value of parameters. The focusing performance are strongly influenced by the parameters of hollow Gaussian beam and the subwavelength focusing can be achieved by the incident radially polarized hollow Gaussdian beam. Therefore, the proposed radially polarized beams can be applied in focusing lens with high numerical aperture to achieve focusing with super resolution.
Keywords:Debye integral; Bessel-Gaussian Beam; Sinh-Gaussian Beam; Hollow Gaussian beam

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