The influence of nonparaxiality on the spectral behavior in Young's experiment illuminated by partially coherent light
Zhao Guang-Pu(赵光普)a)† and Lü Bai-Da(吕百达)b)
a Computational Physics Key Laboratory of Higher Education of Sichuan Province, Yibin University, Yibin 644000, China; b Institute of Laser Physics and Chemistry, Sichuan University, Chengdu 610064, China
Abstract Starting from the Rayleigh--Sommerfeld diffraction integral, this paper studies the spectral behavior in Young's experiment illuminated by nonparaxial partially coherent light and compares with the paraxial case, where the influence of nonparaxiality of partially coherent light on the spectral shifts and spectral switches is stressed. It is shown that there is a spectral shift in the nonparaxial case relative to the paraxial one and the critical position changes, at which the spectral switch occurs. The ratio of the waist width to the central wavelength $w_0/\lambda_0$ and relative spatial correlation length $\varDelta$ affect the spectral difference. The smaller $w_0/\lambda_0$ is, the larger the difference between the nonparaxial and paraxial results appears. The effect of relative spatial correlation length $\varDelta$ is relatively small.
Received: 05 December 2008
Revised: 02 January 2009
Accepted manuscript online:
Fund: Project
suported by the National Natural Science Foundation of China (Grant
No 10574097)，the Outstanding Young Researcher Foundation of Sichuan
Province, China (Grant No 03ZQ026-061), the Applied and Basic
Research Foundation of Sichuan Province, China (Grant No 05J
Y029-102), and the Natural Science Foundation of Yibin University,
China (Grant No 2008B04).
Cite this article:
Zhao Guang-Pu(赵光普) and Lü Bai-Da(吕百达) The influence of nonparaxiality on the spectral behavior in Young's experiment illuminated by partially coherent light 2009 Chin. Phys. B 18 3466
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