Investigation of non-linear imaging in high-resolution transmission electron microscopy

被引：6
作者：
Chang, Yunjie [1 ]
Wang, Yumei [1 ]
Cui, Yanxiang [1 ]
Ge, Binghui [1 ]
机构：
[1] Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China
来源：
MICROSCOPY | 2016年 / 65卷 / 06期
基金：
中国国家自然科学基金;
关键词：
high-resolution transmission electron microscopy; non-linear imaging; transmission cross-coefficient theory; pseudo-weak phase object approximation theory; C-s-corrected TEM imaging; CONTRAST;
D O I：
10.1093/jmicro/dfw032
中图分类号：
TH742 [显微镜];
学科分类号：
摘要：
Transmission cross-coefficient theory and pseudo-weak-phase object approximation theory were combined to investigate the non-linear imaging in high-resolution transmission electron microscopy (HRTEM). The analytical expressions of linear and non-linear imaging components in diffractogram were obtained and changes of linear and nonlinear components over sample thickness were analyzed. Moreover, the linear and non-linear components are found to be an odd and even-function of the defocus and C-s, respectively. Based on this, a method for separating the linear and non-linear contrasts in C-s-corrected (non-zero C-s conditions included) HRTEM images was proposed, and its effectiveness was confirmed by image simulations with AlN as an example.
引用
收藏
页码：465 / 472
页数：8
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