Mixed-field orientation of a thermal ensemble of linear polar molecules

21st International Conference on Laser Spectroscopy

Omiste, Juan J^1 ; González-Férez, Rosario^1

Instituto Carlos i de Física Teórica y Computacional, Departamento de Física Atómica, Molecular y Nuclear, Universidad de Granada, Granade 18071, Spain^1

关键词: Carbonyl sulfide;    Field orientation;    Linear molecules;    Linearly polarized lasers;    Rotational dynamics;    Rotational temperature;    Theoretical study;    Thermal ensembles;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/467/1/012005/pdf
DOI  :  10.1088/1742-6596/467/1/012005

来源: IOP

【 摘 要 】

We present a theoretical study of the impact of an electrostatic field combined with nonresonant linearly polarized laser pulses on the rotational dynamics of a thermal ensemble of linear molecules. We solve the time-dependent Schrodinger equation within the rigid rotor approximation for several rotational states. Using the carbonyl sulfide (OCS) molecule as a prototype, the mixed-field orientation of a thermal sample is analyzed in detail for experimentally accessible static field strengths and laser pulses. We demonstrate that for a characteristic field configuration used in current mixed-field orientation experiments, a significant orientation is obtained for rotational temperatures below 0.7 K as well as using stronger dc fields.