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

doi:10.1088/1674-1056/21/5/054202

中国物理B ›› 2012, Vol. 21 ›› Issue (5): 54202-054202.doi: 10.1088/1674-1056/21/5/054202

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

闫红卫¹,何德²,吕百达¹

1. Institute of Laser Physics and Chemistry, Sichuan University, Chengdu 610064, China;
2. Key Laboratory of Computational Physics, Yibin University, Yibin 644000, China

收稿日期:2011-05-20 修回日期:2012-04-27 出版日期:2012-04-01 发布日期:2012-04-01
基金资助:
Project supported by the National Natural Science Foundation of China (Grant No. 10874125).

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

Received:2011-05-20 Revised:2012-04-27 Online:2012-04-01 Published:2012-04-01
Supported by:
Project supported by the National Natural Science Foundation of China (Grant No. 10874125).

摘要/Abstract

摘要： 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.

关键词: vector singular optics, emergent C-points, L-lines and C-lines, incoherent superposition, degree of polarization

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.

Key words: vector singular optics, emergent C-points, L-lines and C-lines, incoherent superposition, degree of polarization

中图分类号: (Wave propagation, transmission and absorption)

42.25.Bs

42.25.Fx (Diffraction and scattering) 42.25.Ja (Polarization)

闫红卫, 何德, 吕百达. Evolution of emergent C-points, L-lines, and C-lines in free space[J]. 中国物理B, 2012, 21(5): 54202-054202.

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[J]. Chin. Phys. B, 2012, 21(5): 54202-054202.

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

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

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