Cordeiro Cristiano M B, de Carvalho Edson J, Cescato Lucila, Freschi Agnaldo A, Li Lifeng
Physics Institute Gleb Wataghin--University of Campinas, 13083-970, Campinas, Brazil.
J Opt Soc Am A Opt Image Sci Vis. 2006 Jan;23(1):166-71. doi: 10.1364/josaa.23.000166.
The energy conservation of grating diffraction is analyzed in a particular condition of incidence in which two incident waves reach a symmetrical grating from the two sides of the grating normal at the first-order Littrow mounting. In such a situation the incident waves generate an interference pattern with the same period as the grating. Thus in each direction of diffraction, interference occurs between two consecutive diffractive orders of the symmetrical incident waves. By applying only energy conservation and the geometrical symmetry of the grating profile to this problem it is possible to establish a general constraint for the phases and amplitudes of the diffracted orders of the same incident wave. Experimental and theoretical results are presented confirming the obtained relations.
在特定入射角条件下分析了光栅衍射的能量守恒情况，在此条件下，两束入射波以一阶利特罗装置从光栅法线两侧到达对称光栅。在这种情况下，入射波产生与光栅周期相同的干涉图样。因此，在每个衍射方向上，对称入射波的两个连续衍射级之间会发生干涉。通过仅将能量守恒和光栅轮廓的几何对称性应用于此问题，可以为同一入射波的衍射级的相位和振幅建立一个通用约束。给出了实验和理论结果，证实了所得到的关系。
