Balyan Minas K
Faculty of Physics, Yerevan State University, Alex Manoogian 1, Yerevan 0025, Armenia.
J Synchrotron Radiat. 2019 Sep 1;26(Pt 5):1650-1659. doi: 10.1107/S1600577519009196. Epub 2019 Aug 12.
The X-ray integer and fractional Talbot effect is studied under two-wave dynamical diffraction conditions in a perfect crystal, for the symmetrical Laue case of diffraction. The fractional dynamical diffraction Talbot effect is studied for the first time. A theory of the dynamical diffraction integer and fractional Talbot effect is given, introducing the dynamical diffraction comb function. An expression for the dynamical diffraction polarization-sensitive Talbot distance is established. At the rational multiple depths of the Talbot depth the wavefield amplitude for each dispersion branch is a coherent sum of the initial distributions, shifted by rational multiples of the object period and having its own phases. The simulated dynamical diffraction Talbot carpet for the Ronchi grating is presented.
在完美晶体的两波动力学衍射条件下，针对对称劳厄衍射情况，研究了X射线整数和分数塔尔博特效应。首次研究了分数动力学衍射塔尔博特效应。给出了动力学衍射整数和分数塔尔博特效应的理论，引入了动力学衍射梳状函数。建立了动力学衍射偏振敏感塔尔博特距离的表达式。在塔尔博特深度的有理倍数深度处，每个色散分支的波场振幅是初始分布的相干叠加，其位移为物体周期的有理倍数且具有各自的相位。给出了针对龙基光栅的模拟动力学衍射塔尔博特光场分布图。
