H_2^+在阿秒以及双色飞秒激光脉冲中解离时电子位置的相干控制  

Control of electron localization in the dissociation of H_2^+ using attosecond and two-color femtosecond pulses

作　　者：徐天宇[1] 何峰[1] 

机构地区：[1]上海交通大学物理系,激光等离子体教育部重点实验室,上海200240

出　　处：《物理学报》2013年第6期449-454,共6页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:11104180;11175120);上海市浦江人才基金(批准号:11PJ1404800);上海市自然科学基金(批准号:11ZR1417100);霍英东青年教师基金(批准号:131010)资助的课题~~

摘　　要：通过求解含时薛定谔方程,提出了利用三束激光脉冲控制H2+解离以及解离过程中电子位置的方案.第一束阿秒激光脉冲将H2+从1sσg激发至2pσu,在H2+的解离过程中,引入两束波长分别为800nm与400nm的飞秒激光脉冲控制电子在分子内部的运动.通过改变两束激光脉冲的绝对相位,H2+解离后电子的位置可以得到有效控制(最大有86%的概率使得电子附着在某一个原子核上).现有的激光技术条件可以在实验上实现这一理论方案.We study the control of electron localization in the dissociation of H2＋ using three laser pulses by numerically simulating the time-dependent Schr？dinger equation. First, we use an attosecond pulse to excite the wave packet of H2＋ from 1sσg to 2pσu. Then, two-color femtosecond pulses （800 nm＋400 nm） are used to control the dissociation of H2＋. By manipulating the phases of two femtosecond pulses, the electron localization can be controlled effectively. For the proper laser parameters, the maximal probability that the electron is located on the selective nucleus is up to 90%. This theoretical scheme can be realized by the state-of-art laser technology.

关 键 词：相干控制 电子位置 不对称性参数 H2+ 

分 类 号：TN24[电子电信—物理电子学]