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Sub-wavelength focusing generated by radially polarized doughnut Gaussian beams
Jie Lin * #,Jian Guan,Jiubin Tan,Peng Jin
Center of Ultra-precision Optoelectronic Instrument, Harbin Institute of Technology, Harbin 150080
*Correspondence author
#Submitted by
Subject:
Funding: Doctoral Program of Higher Education of China （No.Grants No. 20102304110006 and 20102302120008）
Opened online: 9 January 2014
Accepted by: none
Citation: Jie Lin,Jian Guan,Jiubin Tan.Sub-wavelength focusing generated by radially polarized doughnut Gaussian beams[OL]. [ 9 January 2014] http://en.paper.edu.cn/en_releasepaper/content/4580240
 
 
The radial polarized doughnut Gaussian beam is introduced firstly. The focusing characteristics of radial polarized doughnut Gaussian beam by lens with high numerical aperture is investigated based on Richards-Wolf's vectorial diffraction method. Numerical results indicates that sub-wavelength focusing are obtained for incident radial polarized doughnut Gaussian beam. Therefore, radial polarized doughnut Gaussian beam is considerable in the field of super-resolution focusing.?????
Keywords:Doughnut Gaussian beam; Diffraction theory; radially Polarization; subwavelength focusing
 
 
 

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