引用本文:
【打印本页】   【HTML】   【下载PDF全文】   查看/发表评论  【EndNote】   【RefMan】   【BibTex】
←前一篇|后一篇→ 过刊浏览    高级检索
本文已被:浏览 859次   下载 1445 本文二维码信息
码上扫一扫!
分享到: 微信 更多
通过双Σ型激光方案控制振动态布居转移
李立航,韩永昌*,丛书林
作者单位E-mail
李立航 大连理工大学物理与光电工程学院大连 116024  
韩永昌* 大连理工大学物理与光电工程学院大连 116024 ychan@dlut.edu.cn 
丛书林 大连理工大学物理与光电工程学院大连 116024  
摘要:
通过使用含时量子波包方法,对HF分子该类型的布居转移动力学进行了研究. 提出双Σ型激光控制方案,用于控制布居从|v=16>能级向|v=0>能级进行转移. 该方案的第一步是将布居从v=16>经过中间能级v=11>向|v=7>转移,第二步是将布居从|v=7>经过中间能级|v=3>向|v=0>转移. 在每一个步骤中,三个振动能级在两束重叠的激光脉冲作用下形成一个Σ型的布居转移路径. 通过优化激光的强度、频率和延迟时间,得到了最大的布居转移效率. 计算并比较了正序脉冲和反序脉冲两种情况,在这两种情况下,布居都可以超过90%从|v=16>能级向|v=0>能级进行转移.
关键词:  布居转移  波包动力学  振动态
DOI:10.1063/1674-0068/28/cjcp1410186
分类号:
基金项目:
Steering Vibrational Population Transfer via Double-Σ-Type Laser Scheme
Li-hang Li,Yong-chang Han*,Shu-lin Cong
Abstract:
The vibrational state-selected population transfer from a highly vibrationally excited level to the ground level is of great importance in the preparation of ultra-cold molecules. By using the time-dependent quantum-wave-packet method, the population transfer dynamics is investigated theoretically for the HF molecule. A double-Σ-type laser scheme is proposed to transfer the population from the |v=16> level to the ground vibrational level |v=0> on the ground electronic state. The scheme consists of two steps: The first step is to transfer the population from |v=16> to |v=7> via an intermediate level |v=11>, and the second one is to transfer the population from |v=7> to |v=0> via |v=3>. In each step, three vibrational levels form a Σ-type population transfer path under the action of two temporally overlapped laser pulses. The maximal population-transfer efficiency is obtained by optimizing the laser inten-sities, frequencies, and relative delays. Cases for the pulses in intuitive and counterintuitive sequences are both calculated and compared. It is found that for both cases the population can be efficiently (over 90%) transferred from the |v=16> level to the |v=0> level.
Key words:  Population transfer  Wave packet dynamics  Vibrational state