The influence of nonparaxiality on the spectral behavior in Young's experiment illuminated by partially coherent light |
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| Authors: | Zhao Guang-Pu Lü Bai-Da |
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| Affiliation: | Computational Physics Key Laboratory of Higher
Education
of Sichuan Province, Yibin University, Yibin 644000, China; Institute of Laser Physics and Chemistry, Sichuan
University, Chengdu 610064, China |
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| 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 $\De$ 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 $\De$ is relatively
small. |
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| Keywords: | nonparaxial beams Young's
experiment spectral shift and spectral switch partially coherent
light |
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