迭加态原子高次谐波发射的选频提高  

Frequencies-selected enhancement of the high-order harmonic from an atom with superposition states

作　　者：朱巍[1] 杨玉军[2] 郭福明[2] 刘俊星[3] 

机构地区：[1]中国工程物理研究院流体物理所,绵阳621900 [2]吉林大学原子与分子物理研究所 [3]嘉兴学院机电工程学院,嘉兴314001

出　　处：《原子与分子物理学报》2008年第2期299-302,共4页Journal of Atomic and Molecular Physics

基　　金：自然科学基金资助(10604021,10474028)

摘　　要：本文研究了由体系的基态和较高激发态迭加形成的原子在强激光场作用下的高次谐波发射.观察电离波包的演化过程,阐明了谐波发射效率提高的原因.在给定入射激光条件下,通过选择不同的激发态,可以实现对谐波发射的控制.It is investigated that the high harmonic generation（HHG）from an atom whose initial state is prepared in the superposition of the ground state and a highly-excited state.The enhancement mechanism of the HHG is understood by the observation of the evolvement of the ionization wavepacket.We can achieve frequencies-selected enhancement of the HHG by preparing atoms in superposition of different excited states irradiated by the same laser pulse.

关 键 词：高次谐波 迭加态 

分 类 号：O562.1[理学—原子与分子物理]