| 用两束超短乜秒激光脉冲选择控制D2分子的转动波包 |
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| 引用本文： | 杨增强,郭志荣,葛桂贤.用两束超短乜秒激光脉冲选择控制D2分子的转动波包[J].化学物理学报(中文版),2009(3):228-234. |
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| 作者姓名： | 杨增强 郭志荣 葛桂贤 |
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| 作者单位： | 石河子大学师范学院物理系,生态物理重点实验室,石河子832003 |
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| 基金项目： | This work was supported by the Initial Research Fund of Shihezi University （No.RCZX200743 and No.RCZX200742）. |
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| 摘 要： | 通过求解D2分子在飞秒激光场中的含时薛定谔方程，研究了室温下D2分子在超快1s秒激光驱动下的的转动波包动力学．选择用第一束超短飞秒脉冲与温度为300K的D2分子系综相互作用产生一个相干转动波包，用第二束超短匕秒脉冲在波包的1／4和3／4恢复周期选择操纵D2分子取向．研究结果表明，通过选择两束超短飞秒脉冲的延迟时间，可以有效控制D2分子转动波包中奇偶态的相对布居，从而选择性的控制D2分子取向．
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| 关 键 词： | 转动波包 超短脉冲 时间延迟 奇偶态 |
Selective Alignment of D2 Induced by Two Ultrashort Laser Pulses |
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| Zeng-qiang Yang,Zhi-rong Guo,Gui-xian Ge.Selective Alignment of D2 Induced by Two Ultrashort Laser Pulses[J].化学物理学报(中文版),2009(3):228-234. |
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| Authors: | Zeng-qiang Yang Zhi-rong Guo Gui-xian Ge |
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| Institution: | (Key Laboratory of Ecophysics and Department of Physics, Normal College, Shihezi University, Shihezi 832003, China) |
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| Abstract: | The dynamics of molecular rotational wave packets of D2 induced by ultrashort laser pulses was investigated numerically by solving the time-dependent SchrSdinger equation. Results show that an ultrashort pulse can manipulate a coherent rotational wave packet of D2 se- lectively. In the calculation, a first laser pulse was used to create a coherent rotational wave packet from an initial thermal ensemble of D2 at the temperature of 300 K. The second laser pulse was used to manipulate the rotational wave packet selectively around the first quarter and the three quarters revival. The alignment parameter and its Fourier transform amplitude both illustrate that the relative populations of even and odd rotational states in the final rotational wave packet of D2 can be manipulated by precisely selecting the time delay between the first and the second ultrashort pulse. |
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| Keywords: | Rotational wave packet Ultrashort laser pulse Time delay Odd and evenstates |
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