光学学报, 2019, 39 (5): 0511003, 网络出版: 2019-05-10
非单色X光傅里叶变换鬼成像模拟 下载: 967次
Simulation of Fourier-Transform Ghost Imaging Using Polychromatic X-Ray Sources
摘要
X光傅里叶变换鬼成像(FGI)有望实现台式纳米级显微系统,但其光源为小型化实验室X光源,单色性较差,难以直接获取高质量的样品衍射谱。针对这一问题,进行了非单色光FGI理论推导和数值模拟分析,阐明了非单色光源对衍射谱失真的影响机制,并在此基础上提出了衍射谱校正方法。基于不同波长对应的衍射谱之间的尺度变换关系,可以建立样品衍射谱与非单色光强度关联函数之间的矩阵方程,从而解算出样品衍射谱。
Abstract
Tabletop nanoscale microscopy can be performed using X-ray Fourier-transform ghost imaging (FGI). However, the X-ray source used in a tabletop FGI system is one miniaturized laboratory source with poor monochromatic quality, making it difficult to directly obtain high-quality diffraction patterns from a sample. To obtain high-quality patterns, the theoretical derivations and numerical simulations on FGI using a polychromatic source were performed. The mechanism of the influence of polychromatic light on the distortion of diffraction patterns in FGI was clarified, and further a diffraction-pattern correction method was proposed. Based on the scaling relation between the different X-ray wavelengths and the corresponding diffraction patterns, a matrix equation was derived linking the diffraction pattern of a sample and the polychromatic-intensity correlation function, using which the diffraction pattern of the sample can be obtained.
杨善初, 喻虹, 陆荣华, 谈志杰, 韩申生. 非单色X光傅里叶变换鬼成像模拟[J]. 光学学报, 2019, 39(5): 0511003. Shanchu Yang, Hong Yu, Ronghua Lu, Zhijie Tan, Shensheng Han. Simulation of Fourier-Transform Ghost Imaging Using Polychromatic X-Ray Sources[J]. Acta Optica Sinica, 2019, 39(5): 0511003.