Laser control schemes for molecular switches
Laser control schemes for molecular switches
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DOI：
10.1007/s00340-004-1636-x
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发表时间：
2004-12-01
影响因子：
2.1
通讯作者：
de Vivie-Riedle, R
中科院分区：
文献类型：
--
作者：
Geppert, D;Seyfarth, L;de Vivie-Riedle, R
分子开关作为一种有前景的纳米器件被广泛应用于数据存储和信息处理等领域。为此，需要整个开关过程的高可控性。我们提出使用飞秒形状激光脉冲来启动和控制一个快速有效的由锥形交叉介导的开关过程。研究了以1,3-环己二烯开环为关键活性的双稳分子光反应。在基于从头算和环己二烯开环反应量子动力学计算的模型中，对这类反应的控制方案进行了研究。通过定义一个中间目标，我们可以在该模型中使用优化的激光脉冲实现产品控制。
Molecular switches are discussed as promising nanoscale devices for various applications including data storage and information processing. For this purpose a high controllability of the complete switching process is desirable. We propose to use shaped femtosecond laser pulses to initiate and control a fast and efficient switching process mediated by conical intersections. We focus on photoreactions of bistable molecules in which the ring opening of 1,3-cyclohexadiene constitutes the key activity. The investigations of control schemes for this type of reactions are carried out in a model based on ab initio and quantum dynamical calculations of the ring-opening reaction of cyclohexadiene. By defining an intermediate target, we can achieve product control with optimized laser pulses in this model.