Locally designed pulse shaping for selective preparation of enantiomers from their racemate
Locally designed pulse shaping for selective preparation of enantiomers from their racemate
复制标题
本地设计的脉冲整形，用于从外消旋体中选择性制备对映体
DOI：
10.1063/1.1334867
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发表时间：
2001
影响因子：
4.4
通讯作者：
Y. Fujimura
中科院分区：
文献类型：
--
作者：
K. Hoki;Y. Ohtsuki;Y. Fujimura
我们提出了一种设计激光场的方法来控制从它们的外消旋体选择性制备对映体。利用密度算子形式下的局部优化控制理论，导出了沿Z轴传播的激光脉冲的两个分量[EX(t)和EY(t)]的表达式。该表达被应用于低温下由预取向磷酸（H2POSH）选择性制备（R-, L-）对映体。将目标作业者定位在双井势的一侧。首先，对一个简单的一维模型进行了处理。然后，简要地考虑了一个包含绕预定向扭转轴自由旋转的二维模型。在一维模型下，对映体的制备基本完成。最优电场由两个相位相同但幅度不同的线极化脉冲序列组成。这意味着合成的电场是直线的。
We present a method for the design of laser fields to control a selective preparation of enantiomers from their racemate. An expression for two components of the laser pulses [EX(t) and EY(t)] propagating along the Z axis is derived using a locally optimized control theory in the density operator formalism. This expression was applied to a selective preparation of (R-, L-) enantiomers from preoriented phosphinotioic acid (H2POSH) at low temperatures. The target operator was set for the populations to be localized in one side of the double-well potential. First, a simple one-dimensional model was treated. Then, a two-dimensional model in which a free rotation around the preoriented torsional axis is included was briefly considered. In the one-dimensional model, almost complete preparation of the enantiomers was obtained. The optimal electric field consists of a sequence of two linearly polarized pulses with the same phases but with different magnitudes. This means that the resultant electric field is linea...