title: Investigation of non-linear imaging in high-resolution transmission electron microscopy.
abstract: 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 non-linear 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 Cs, respectively. Based on this, a method for separating the linear and non-linear contrasts in Cs-corrected (non-zero Csconditions included) HRTEM images was proposed, and its effectiveness was confirmed by image simulations with AlN as an example.
authors: Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China.
authors: Yunjie
authors: Y
authors: Chang
authors: Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China.
authors: Yumei
authors: Y
authors: Wang
authors: Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China.
authors: Yanxiang
authors: Y
authors: Cui
authors: Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China bhge@iphy.ac.cn.
authors: Binghui
authors: B
authors: Ge
keywords: Cs-corrected TEM imaging; high-resolution transmission electron microscopy; non-linear imaging; pseudo-weak phase object approximation theory; transmission cross-coefficient theory