基于冷原子系综自发Raman散射产生关联光子的实验研究  

Experimental Research for Generation of Correlation Photons based on Spontaneous Raman Scattering Process in Cold Atomic Ensemble

作　　者：葛伟[1,2] 田龙[1,2] 原浩翔 李淑静[1,2] 王海[1,2] 

机构地区：[1]山西大学光电研究所量子光学与光量子器件国家重点实验室,山西太原030006 [2]山西大学极端光学协同创新中心,山西太原030006

出　　处：《山西大学学报（自然科学版）》2016年第4期601-605,共5页Journal of Shanxi University(Natural Science Edition)

基　　金：973计划(2010CB923103);国家自然科学基金(11475109;11274211;60821004)

摘　　要：利用自发拉曼散射过程,在87 Rb冷原子系综中进行了关联光子对的制备。实验结果表明:存储时间为1μs时,关联光子的二阶关联函数g(2)可达到84,表明光子对之间存在着很强的非经典关联。另外,在激发率为1.5%时,对anti-Stokes光子的宣布式单光子统计特性α进行了测量,当存储时间小于24μs时,α保持在0.23附近。该工作为冷原子系综中纠缠光子对的产生提供了实验基础。The generation of correlation photon pairs was implemented in cold 87 Rb ensemble based on Spon- taneous Raman scattering process, which demonstrates that the second order intensity cross-correlation functions g（2） can be up to 84 on condition that the storage time r is equal to lμs, indicating the strong non- classic correlation features among photon pairs. Besides,based on the excitation rate of 1.5%, the meas- urement of a, heralded single photon statistical property of anti-Stokes photons, was carried out, which shows that the value of a is always near to 0.23 while the storage time increased from 0 to 24 μs. It is be- lieved that this work will pave the way for the generation of entanglement photons in atomic ensemble.

关 键 词：自发拉曼散射 冷原子系综 关联光子 光子统计特性 

分 类 号：O431[机械工程—光学工程]