Generation of an axially super-resolved quasi-spherical focal spot using an amplitude-modulated radially polarized beam

2011 ◽  
Vol 36 (13) ◽  
pp. 2471 ◽  
Author(s):  
Han Lin ◽  
Baohua Jia ◽  
Min Gu
Keyword(s):  
Focal Spot ◽  
Radially Polarized Beam ◽  
Polarized Beam ◽  
Radially Polarized

Study of Focal Spot of Radially Polarized Beam

2010 ◽  
Vol 30 (12) ◽  
pp. 3597-3603
Author(s):  
阎杰 Yan Jie ◽  
鲁拥华 Lu Yonghua ◽  
王沛 Wang Pei ◽  
明海 Ming Hai
Keyword(s):  
Focal Spot ◽  
Radially Polarized Beam ◽  
Polarized Beam ◽  
Radially Polarized

scholarly journals Sharper Focal Spot for a Radially Polarized Beam Using Ring Aperture with Phase Jump

2013 ◽  
Vol 2013 ◽  
pp. 1-8 ◽  
Author(s):  
Svetlana N. Khonina ◽  
Andrei V. Ustinov
Keyword(s):  
Focal Spot ◽  
Central Peak ◽  
Spot Size ◽  
Diffraction Limit ◽  
Destructive Interference ◽  
Phase Jump ◽  
Radially Polarized Beam ◽  
Annular Aperture ◽  
Polarized Beam ◽  
Radially Polarized

We study analytically and numerically in which way the width of ring aperture containing a phase jump affects the size and intensity of the focal spot generated with a radially polarized beam. It is shown that by means of destructive interference of beams coming from the different-phase rings it becomes possible to overcome the scalar diffraction limit corresponding to the first zero of the zero-order Bessel function. The minimal focal spot size (FWHM=0.33λ) is found to be attained when the annular aperture width amounts to 20% of the full-aperture radius. In this case, the side-lobe intensity is not larger than 30% of the central peak. A wider annular aperture with the phase jump introduced is also shown to form a focal spot not exceeding the diffraction limit for a narrow annular aperture, simultaneously providing a nearly six times higher intensity. In this case, the side lobes amount to 35% of the central peak.

Design of Three-Dimensional Superresolution Diffractive Optical Elements for Radially Polarized Beam

2010 ◽  
Vol 30 (11) ◽  
pp. 3295-3299 ◽  
Author(s):  
程侃 Cheng Kan ◽  
谭峭峰 Tan Qiaofeng ◽  
周哲海 Zhou Zhehai ◽  
金国藩 Jin Guofan
Keyword(s):  
Three Dimensional ◽  
Diffractive Optical Elements ◽  
Optical Elements ◽  
Radially Polarized Beam ◽  
Polarized Beam ◽  
Radially Polarized

Effect of the Elliptic Annular Aperture on the Focusing of Radially Polarized Beam

2016 ◽  
Vol 36 (3) ◽  
pp. 0326002 ◽  
Author(s):  
蔡勋明 Cai Xunming ◽  
赵晶云 Zhao Jingyun ◽  
范梦慧 Fan Menghui ◽  
罗姣莲 Luo Jiaolian
Keyword(s):  
Radially Polarized Beam ◽  
Annular Aperture ◽  
Polarized Beam ◽  
Radially Polarized
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