The influence of nonparaxiality on the spectral behavior in Young's experiment illuminated by partially coherent light  

作　　者：赵光普 吕百达 

机构地区：[1]Computational Physics Key Laboratory of Higher Education of Sichuan Province,Yibin University [2]Institute of Laser Physics and Chemistry,Sichuan University

出　　处：《Chinese Physics B》2009年第8期3466-3472,共7页中国物理B（英文版）

基　　金：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);the Natural Science Foundation of Yibin University,China (Grant No 2008B04)

摘　　要：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 ω0/λ0 and relative spatial correlation length △ affect the spectral difference. The smaller ω0/λ0 is, the larger the difference between the nonparaxial and paraxial results appears. The effect of relative spatial correlation length △ is relatively small.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 ω0/λ0 and relative spatial correlation length △ affect the spectral difference. The smaller ω0/λ0 is, the larger the difference between the nonparaxial and paraxial results appears. The effect of relative spatial correlation length △ is relatively small.

关 键 词：nonparaxial beams Young＇s experiment spectral shift and spectral switch partially coherent light 

分 类 号：O436.1[机械工程—光学工程] TS262.2[理学—光学]