Nonlinear ionization control by temporally shaped fs+ps double-pulse sequence on ZnO  

作　　者：尹唯一 宋娟 任翔宇 姚倩 林贤 戴晔 Weiyi Yin;Juan Song;Xiangyu Ren;Qian Yao;Xian Lin;Ye Dai(Department of Physics,Shanghai University,Shanghai 200444,China;School of Material Science and Engineering,Jiangsu University,Zhenjiang 212013,China)

机构地区：[1]Department of Physics,Shanghai University,Shanghai 200444,China [2]School of Material Science and Engineering,Jiangsu University,Zhenjiang 212013,China

出　　处：《Chinese Optics Letters》2023年第2期71-75,共5页中国光学快报（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(Nos.12274280,11774220 and 11974147)。

摘　　要：We designed a femtosecond(fs)+picosecond(ps)double-pulse sequence by using a Mach-Zehnder-like apparatus to split a single 120 fs pulse into two sub-pulses,and one of them was stretched to a width of 2 ps by a four-pass grating system.Through observing the ripples induced on the ZnO surface,we found the ionization rate appeared to be higher for the sequence in which the fs pulse arrived first.The electron rate equation was used to calculate changes of electron density distribution for the sequences with different delay times.We suggest that using a temporally shaped fs+ps pulse sequence can achieve nonlinear ionization control and influence the induced ripples.

关 键 词：ZNO ultrafast double-pulse sequence RIPPLE temporal shaping nonlinear ionization 

分 类 号：TN304[电子电信—物理电子学]