Study correlation vortices in the near-field of partially coherent vortex beams diffracted by an aperture

doi:10.1088/1674-1056/19/10/104001

中国物理B ›› 2010, Vol. 19 ›› Issue (10): 104001-104001.doi: 10.1088/1674-1056/19/10/104001

Study correlation vortices in the near-field of partially coherent vortex beams diffracted by an aperture

李建龙

College of Physics Science and Technology, Sichuan University, Chengdu 610064, China

收稿日期:2009-12-20 修回日期:2010-05-24 出版日期:2010-10-15 发布日期:2010-10-15
基金资助:
Project supported by the China Postdoctoral Science Foundation (Grant No. 2009450159) and the Foundation of the State Key Laboratory of Optical Technologies for Micro-Frabrication & Micro-Engineering, Chinese Academy of Sciences (Grant No. KF001).

Study correlation vortices in the near-field of partially coherent vortex beams diffracted by an aperture

Li Jian-Long(李建龙)^†

College of Physics Science and Technology, Sichuan University, Chengdu 610064, China

Received:2009-12-20 Revised:2010-05-24 Online:2010-10-15 Published:2010-10-15
Supported by:
Project supported by the China Postdoctoral Science Foundation (Grant No. 2009450159) and the Foundation of the State Key Laboratory of Optical Technologies for Micro-Frabrication & Micro-Engineering, Chinese Academy of Sciences (Grant No. KF001).

摘要/Abstract

摘要： We have derived the analytical expression of the electric cross-spectral density in the near- field of partially coherent vortex beams diffracted by an aperture. Taking the Gaussian Schell-model vortex beam as a typical example of partially coherent vortex beams, the spatial correlation properties and correlation vortices in the near-field of partially coherent vortex beams diffracted by a rectangle aperture are studied. It is shown that the off-axis displacement, spatial degree of coherence parameter, propagation distance, and the opening factor of the aperture affect the spectral degree of coherence and positions of correlation vortices. With the optimization algorithm, we obtain the symmetric distributing coherent vortex.

Abstract: We have derived the analytical expression of the electric cross-spectral density in the near- field of partially coherent vortex beams diffracted by an aperture. Taking the Gaussian Schell-model vortex beam as a typical example of partially coherent vortex beams, the spatial correlation properties and correlation vortices in the near-field of partially coherent vortex beams diffracted by a rectangle aperture are studied. It is shown that the off-axis displacement, spatial degree of coherence parameter, propagation distance, and the opening factor of the aperture affect the spectral degree of coherence and positions of correlation vortices. With the optimization algorithm, we obtain the symmetric distributing coherent vortex.

Key words: spatial correlation property, correlation vortex, aperture diffraction, near-field

中图分类号: (Integral and integrodifferential equations)

02.60.Nm

42.25.Fx (Diffraction and scattering)

李建龙. Study correlation vortices in the near-field of partially coherent vortex beams diffracted by an aperture[J]. 中国物理B, 2010, 19(10): 104001-104001.

Li Jian-Long(李建龙). Study correlation vortices in the near-field of partially coherent vortex beams diffracted by an aperture[J]. Chin. Phys. B, 2010, 19(10): 104001-104001.

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Study correlation vortices in the near-field of partially coherent vortex beams diffracted by an aperture

Study correlation vortices in the near-field of partially coherent vortex beams diffracted by an aperture

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