Bae In-Ho, Moon Han Seb, Kim Min-Koeung, Lee Lim, Kim Jung Bog
Department of Physics, Pusan National University, Busan, Korea.
Opt Express. 2010 Jan 18;18(2):1389-97. doi: 10.1364/OE.18.001389.
We present the transformation of electromagnetically induced transparency (EIT) into narrow enhanced absorption with an on-resonant standing-wave coupling field in the 5S(1/2)-5P(1/2) transition of the Lambda-type system of (87)Rb atoms. When a coupling laser field was changed from a travelling-wave to a standing-wave that was made by adding a counter-propagating L(C) laser, the transmittance spectrum of the L(P) laser transformed the typical EIT into dramatically enhanced absorption, and a Bragg reflection signal was generated by the periodic modulation of atomic absorption. The reflected probe laser corresponding to a Bragg reflection was measured to be approximately 11.5% of the power of the incident probe laser. We analyzed the enhanced absorption signal and Bragg reflection spectrum as a function of the power and frequency detuning of the coupling laser.
我们展示了在（87）Rb原子的拉姆达型系统的5S（1/2）-5P（1/2）跃迁中，利用共振驻波耦合场将电磁诱导透明（EIT）转变为窄增强吸收。当耦合激光场从行波变为通过添加反向传播的L（C）激光形成的驻波时，L（P）激光的透射光谱将典型的EIT转变为显著增强的吸收，并且通过原子吸收的周期性调制产生了布拉格反射信号。测得对应于布拉格反射的反射探测激光约为入射探测激光功率的11.5%。我们分析了增强吸收信号和布拉格反射光谱作为耦合激光功率和频率失谐的函数。
