Kim Ho-Jung, Moon Han Seb
Department of Physics, Pusan National University, Busan, Korea.
Opt Express. 2011 Jan 3;19(1):168-74. doi: 10.1364/OE.19.000168.
We report on electromagnetically induced absorption (EIA) with sub-kHz spectral width in a paraffin-coated Rb vapor cell in the Hanle configuration of the 5S(1/2)(F=2)-5P(3/2)(F'=3) transition of 87Rb atoms. Using a linearly polarized laser, the spectral width of the Hanle EIA spectrum was measured to be 0.55 mG (390 Hz). The narrow spectral width was due to the maintaining of atomic coherence between ground states while atoms collided with the anti-relaxation coated wall of the Rb vapor cell. Under a weak transverse residual magnetic field, the angle between the transverse residual magnetic field and the direction of linear polarization affected the magnitude of the narrow Hanle EIA spectrum. This is because of the change of atomic magnetic momentum due to the weak transverse residual magnetic field around the zero value of the longitudinal magnetic field.
我们报道了在87Rb原子5S(1/2)(F = 2)-5P(3/2)(F' = 3)跃迁的汉勒配置下，石蜡涂层Rb蒸汽池中具有亚千赫兹光谱宽度的电磁诱导吸收（EIA）。使用线偏振激光，测得汉勒EIA光谱的光谱宽度为0.55 mG（390 Hz）。窄光谱宽度归因于原子与Rb蒸汽池的抗弛豫涂层壁碰撞时基态之间原子相干性的维持。在弱横向残余磁场下，横向残余磁场与线偏振方向之间的夹角影响窄汉勒EIA光谱的幅度。这是由于纵向磁场零值附近的弱横向残余磁场导致原子磁矩发生变化。
