摘要
本文通过求解薛定谔方程,理论探索了高次谐波及孤立阿秒脉冲在相位调制的单色中红外激光场中的产生.研究结果表明,通过加入含时相位啁啾小量,能够有效的提高高次谐波的产生效率,获得超宽平台谐波谱及超短孤立阿秒脉冲.特别是在相位为0.3π的基础上,同时加入啁啾小量βt,在β=0.3时,可得到带宽为822 e V的超连续高次谐波平台.最后通过叠加第二平台高次谐波,可得到带宽仅为2.7 as的孤立阿秒脉冲.且脉冲强度比没有加入啁啾小量的情况下显著增强.
By solving the time-dependent Schr9 dinger equation,we present a theoretical investigation of high-order harmonic and isolated attosecond pulse generation in infrared laser field with phase chirping. It is demonstrated that the yield of the supercontinuum harmonic can be increased and ultroshort isolated attosecond pulse can be obtained by phase chirping. Especially,by the phase of 0. 3 π and β = 0. 3 in βt,the bandwidth of 822 e V of harmonic spectrum and an isolated 2. 7 as pulse can be obtained. Meanwhile,the conversion efficiency of harmonic and intensity of isolated attosecond pulse can be enhanced effectively.
作者
宋丹丹
左强
武红
杨志红
王允辉
SONG Dan-Dan;ZUO Qiang;WU Hong;YANG Zhi-Hong;WANG Yun-Hui(Information Physics Research Center,Nanjing University of Posts and Telecommunications,Nanjing 210023,China)
出处
《原子与分子物理学报》
CAS
北大核心
2018年第3期466-472,共7页
Journal of Atomic and Molecular Physics
基金
国家自然科学基金(61605087)
江苏省自然科学基金(BK20160881)
江苏省教育厅项目(16KJB140010)
南京邮电大学科研启动基金(NY216029
NY215064)
关键词
孤立阿秒脉冲
高次谐波
相位调制啁啾
中红外激光场
Isolated attosecond pulse
High-order harmonic
Phase modulation phase-chirping effect
Mid-infrared laser field