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Chin. Phys. B, 2012, Vol. 21(5): 054202    DOI: 10.1088/1674-1056/21/5/054202

Evolution of emergent C-points, L-lines, and C-lines in free space

Yan Hong-Wei(闫红卫)a), He De(何德)b), and Lü Bai-Da(吕百达)a)†
a. Institute of Laser Physics and Chemistry, Sichuan University, Chengdu 610064, China;
b. Key Laboratory of Computational Physics, Yibin University, Yibin 644000, China
Abstract  Polarization singularities, which emerge from the incoherent superposition of two vector electric fields with the same frequency, and their evolution in free space are studied analytically and illustrated by numerical examples. It is shown that there exist C-points, L-lines, in particular, C-lines in incoherently superimposed two-dimensional wavefields. Usually, the C-lines are unstable and disappear during the free-space propagation. The motion, pair creation--annihilation process of the emergent C-points, as well as the distortion of the L-lines may take place, and the degree of polarization of the emergent C-points varies upon propagation and may be less than 1.
Keywords:  vector singular optics      emergent C-points      L-lines and C-lines      incoherent superposition      degree of polarization  
Received:  20 May 2011      Revised:  27 April 2012      Accepted manuscript online: 
PACS:  42.25.Bs (Wave propagation, transmission and absorption)  
  42.25.Fx (Diffraction and scattering)  
  42.25.Ja (Polarization)  
Fund: Project supported by the National Natural Science Foundation of China (Grant No. 10874125).

Cite this article: 

Yan Hong-Wei(闫红卫), He De(何德), and Lü Bai-Da(吕百达) Evolution of emergent C-points, L-lines, and C-lines in free space 2012 Chin. Phys. B 21 054202

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