矢量光场对高密光栅Talbot效应的影响

发布时间：2018-03-15 17:30

本文选题：矢量衍射积分　切入点：塔尔博特效应　出处：《激光杂志》2017年03期 　论文类型：期刊论文

【摘要】：基于麦克斯韦方程组,借助矢势理论,经适当推导得出薄理想导电平面衍射光栅的矢量衍射积分公式。在特定偏振光入射下,给出了塔尔博特距离处衍射场强度分布公式。不作可能影响理论结果的近似条件下,分析了严格的积分形式解的意义。在无法得到解析解的情况下,采用离散化方法对不同光栅周期条件下第一塔尔博特距离处的衍射场进行了实验模拟,并对相同光栅周期下,更短波长的衍射结果进行模拟。结果表明,当光栅周期在微米量级,小于2倍波长的情况下,塔尔博特现象不再明显,其塔尔博特距离处的强度分布与光栅出射面的强度分布差异很大。同时,在更短波长的条件下,塔尔博特效应依然有效,对微米结构或者更小的结构应用塔尔博特效应可以采用更短波长的电磁波来实现。
[Abstract]:Based on Maxwell's equations and vector potential theory, the vector diffraction integral formula of thin ideal conducting plane diffraction grating is derived. The intensity distribution formula of diffraction field at Talbot distance is given. The significance of the strict integral form solution is analyzed under the condition that the theoretical results can not be affected. The diffraction field at the first Talbot distance under different grating periods is simulated by discrete method, and the diffraction results of shorter wavelength at the same grating period are simulated. When the grating period is in the order of micron and less than 2 times wavelength, the Talbot phenomenon is no longer obvious, and the intensity distribution at Talbot distance is very different from the intensity distribution on the surface of the grating. At the same time, under the condition of shorter wavelength, The Talbot effect is still effective, and the Talbot effect can be realized by using shorter wavelength electromagnetic wave for micron structure or smaller structure.
【作者单位】：山西师范大学物理与信息工程学院;
【分类号】：TN25

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