The role of the Kramers-Henneberger atom in the higher-order Kerr effect
The role of the Kramers-Henneberger atom in the higher-order Kerr effect
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DOI：
10.1088/1367-2630/15/8/083012
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发表时间：
2013-08-06
影响因子：
3.3
通讯作者：
Ivanov, Misha
中科院分区：
文献类型：
--
作者：
Richter, Maria;Patchkovskii, Serguei;Ivanov, Misha
我们讨论了强场电离、克尔响应饱和、克雷默斯-亨内伯格（KH）原子形成和强红外（IR）外场长寿命激发之间的联系。我们提出了原子在强红外激光场中强度相关响应的广义模型，描述了驱动场频率下非线性响应与标准模型的偏差。我们表明，塑造驱动激光脉冲可以揭示单个原子克尔响应中激发态KH的特征。
We discuss the connection between strong-field ionization, saturation of the Kerr response and the formation of the Kramers-Henneberger (KH) atom and long-living excitations in intense infrared (IR) external fields. We present a generalized model for the intensity-dependent response of atoms in strong IR laser fields, describing deviations in the nonlinear response at the frequency of the driving field from the standard model. We show that shaping the driving laser pulse allows one to reveal signatures of the excited KH states in the Kerr response of an individual atom.