论文标题
两色CW激光场中的线性极性分子：对称分析
A linear polar molecule in a two-color cw laser field: a symmetry analysis
论文作者
论文摘要
提出了两种非共振CW激光场中线性极性分子的旋转动力学的理论研究。通过系统地考虑该磁场与电偶极矩的相互作用，分子的极化性和超极化性，在时间平均近似不结合的情况下探索了哈密顿量对称性对方向和比对的影响。结果表明，对齐和方向满足某些对称性，这是相位和田间强度的函数。平均而言，单色CW激光场DOEST不使分子定向，这是具有激光频率的奇数甚至偶数的两色，以打破头部尾巴订单限制。
A theoretical study of the rotational dynamics of a linear polar molecule in a two-color non-resonant cw laser field is presented. By systematically considering the interactions of this field with the electric dipole moment, polarizability and hyperpolarizability of the molecule, the effect of the symmetries of the Hamiltonian on the orientation and alignment is explored in a regime where the time-average approximation does not hold. It is shown that the alignment and orientation satisfy certain symmetries as a function of the phases and field strengths. On average a one-color cw laser field doest not orient the molecule, being necessary a two-color one having odd and even products of the laser frequency to break the head-versus-tail order confinement.
