Diffraction of a one-dimensional phase grating in the deep Fresnel field
Diffraction of a one-dimensional phase grating in the deep Fresnel field
复制标题
深菲涅耳场中一维相位光栅的衍射
DOI：
10.1364/josaa.24.003636
复制
发表时间：
2007-11-01
影响因子：
1.9
通讯作者：
Cheng, Chuanfu
中科院分区：
文献类型：
--
作者：
Teng, Shuyun;Zhang, Ningyu;Cheng, Chuanfu
We analyze theoretically the diffraction of phase gratings in the deep Fresnel field on the basis of the theory of scalar diffraction and Green's theorem and present the general formula for the diffraction intensity of a one-dimensional sinusoidal phase grating. The numerical calculations show that in the deep Fresnel region the diffraction distribution can be described by designating three characteristic regions that are influenced by the parameters of the grating. The microlensing effect of the interface of the phase grating provides the corresponding explanation. Moreover, according to the viewpoint that the diffraction intensity distribution is the result of the interference of the diffraction orders of the grating, we find that the diffraction patterns, depending on the carved depth of the phase grating, are determined by the contributing diffraction orders, their relative power, and the quasi-Talbot effect of the phase grating, which results from the second meeting of the diffraction orders carrying most of the power of the total field, as in the case of the amplitude grating. (c) 2007 Optical Society of America.
