冷原子系综中光存储效率与耦合光强的关系研究  

The Investigation of Relationship Between Light Storage Efficiency and Coupling Intensity in Cold Atom Ensemble

作　　者：李淑静[1] 赵兴波[1] 徐忠孝[1] 武跃龙[1] 刘海龙[1] 郑海燕[1] 张玲[1] 王海[1] 

机构地区：[1]量子光学与光量子器件国家重点实验室,山西大学光电研究所,山西太原030006

出　　处：《量子光学学报》2010年第3期189-195,共7页Journal of Quantum Optics

基　　金：国家自然科学基金(10874106,60821004,10904086);国家基础研究项目基金(2006CB921103);山西省自然科学基金(2007011004,2010021003-1);山西大学博士启动基金

摘　　要：我们在87Rb冷原子团中利用电磁感应透明(EIT)动力学过程实现了光学信号的存储与释放,研究了光存储效率与耦合光强的关系。实验结果表明,在较低的耦合光强下,存储效率随耦合光强增大而增大,当耦合光达到一定强度时,存储效率不再增高,然后随着耦合光强增大而降低。通过分析光脉冲在冷原子团中传播时的吸收和色散特性,我们对存储效率随耦合光强的变化趋势给出了定性解释。By using electromagnetically induced transparency （EIT） dynamics, we realized the storage release of coupling optical lntenslt signals in 87 Rb cold atoms, studied the relationship between the storage efficiency and y. Experimental results show that the storage efficiency increases with the coup and the intensity in the situation of low coupling intensity. When the coupling beam exceeds certain intensity, the storage efficiency doesnt t increase any more. Then it runs down with the rise of coupling intensity. By analyzing the absorption and dispersion characteristics of light pulse propagating through cold atoms, we made a qualitative explanation of the changing trend of the storage efficiency with the coupling intensity changing.

关 键 词：冷原子系综 光存储 存储效率 

分 类 号：O431[机械工程—光学工程]