文献类型：期刊文献

英文题名：Interference between inter- and intraband currents in high-order harmonic generation in solids

作者：Wang, Xin-Qiang[1,2];Xu, Yan[3];Huang, Xiao-Huan[4];Bian, Xue-Bin[1]

第一作者：Wang, Xin-Qiang

通讯作者：Bian, XB[1]

机构：[1]Chinese Acad Sci, Wuhan Inst Phys & Math, State Key Lab Magnet Resonance & Atom & Mol Phys, Wuhan 430071, Hubei, Peoples R China;[2]Univ Chinese Acad Sci, Sch Phys Sci, Beijing 100049, Peoples R China;[3]Xinxiang Univ, Coll Phys & Elect Engn, Xinxiang 453003, Peoples R China;[4]Hubei Normal Univ, Coll Chem & Chem Engn, Hubei Key Lab Pollutant Anal & Reuse Technol, Huangshi 435002, Peoples R China

第一机构：Chinese Acad Sci, Wuhan Inst Phys & Math, State Key Lab Magnet Resonance & Atom & Mol Phys, Wuhan 430071, Hubei, Peoples R China

通讯机构：[1]corresponding author), Chinese Acad Sci, Wuhan Inst Phys & Math, State Key Lab Magnet Resonance & Atom & Mol Phys, Wuhan 430071, Hubei, Peoples R China.

年份：2018

卷号：98

期号：2

外文期刊名：PHYSICAL REVIEW A

收录：;EI(收录号：20183605783396);Scopus(收录号：2-s2.0-85052678051);WOS:【SCI-EXPANDED(收录号:WOS:000442871700005)】；

基金：We thank MingHu Yuan, Tianjiao Shao, Tao-Yuan Du, Dong Tang, Mu-Zi Li, and Ling-Jie Lv for helpful discussions. This work was supported by the National Natural Science Foundation of China (Grants No. 21501055 and No. 11674363) and the Ninth Group of Key Disciplines in Henan Province (Grant No. 2018119).

语种：英文

外文关键词：Harmonic generation - II-VI semiconductors - Magnetic semiconductors - Oxide minerals - Wide band gap semiconductors - Zinc oxide

摘要：We investigate theoretically interference effects between inter- and intraband currents in high-order harmonic generation (HHG) from solids by numerically solving the one-dimensional time-dependent Schrodinger equation (TDSE) for a model crystal and the semiconductor Bloch equation (SBE) for a real material zinc oxide (ZnO). The TDSE method is used to extract the explicit dynamic process of interference. We find that the contribution from constructive interference dominates the harmonic spectrum when the interband current and intraband current have good synchronism. When they lose synchronism, destructive interference counteracts contributions from inter- and intraband currents. The phase differences between intra- and interband harmonics are close to zero and pi when constructive and destructive interferences occur, respectively. In k space, constructive (destructive) interference occurs near a moment when electrons at most transit to a higher (lower) energy band. Interference effects create fine structures in harmonic spectra and lead to suppression of harmonic signals which can be directly measured in experiments. The interference effect is also investigated by using the SBE method in HHG from ZnO.