Radiation Trapping in a Cold and Dense Atomic Ensemble in a Magnetic Field

24th International Laser Physics Workshop

Sokolov, Igor^1

Peter the Great St.Petersburg Polytechnic University, Polytechnicheskaya st. 29, Saint-Petersburg

194251, Russia^1

关键词: Atomic excitations;    Carrier frequency;    Excitation pulse;    Interatomic separation;    Magnetostatic field;    Radiation trapping;    Spontaneous decay;    Theoretical investigations;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/691/1/012020/pdf
DOI  :  10.1088/1742-6596/691/1/012020

来源: IOP

【 摘 要 】

We report a theoretical investigation of cooperative spontaneous decay of atomic excitation in cold ensemble under condition that average interatomic separation is comparable with resonant light wavelength. We show that magnetostatic field causes some acceleration of decay at shot time interval upon turn off the excitation pulse and essential decreasing of decay rate of long-lived sub-radiant states. The dependence of this effect on duration of excitation pulse as well as on its carrier frequency is considered.