EIT双光子失谐情况下恢复信号与存储时间的关系研究  

Experimental Study of the Relationship between Retrieval Signal and Storage Time under the Condition of Two-photon Detuning

作　　者：闫研[1] 李淑静[1] 田龙[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》2015年第4期344-350,共7页Journal of Quantum Optics

基　　金：国家自然科学基金(11475109;11274211)

摘　　要：本文在87 Rb热原子系综中基于电磁感应透明进行了光存储的实验研究。在原子气室温度65℃,单光子失谐650 MHz时,测量了双光子共振和失谐0.48 MHz两种情况下,恢复信号随存储时间的变化。结果表明:在双光子共振的情况下,随着存储时间的增加,恢复信号的幅度降低,其形状基本保持不变。而在双光子失谐0.48 MHz时,存储信号随存储时间的增加出现周期性形变,周期为2μs。该实验为连续变量在热原子系综中的存储提供了实验基础。With the electromagnetically induced transparency dynamics,we have carried out the experiment of light storage in 87 Rb hot vapor.When the temperature of 87 Rb vapor was 65 ℃ and the one-photon detuning was 650 MHz,we studied the retrieval signals as a function of storage time at two-photon resonance and 0.48 MHz two-photon detuning.The experimental results showed that the magnitude of retrieval signal decreased and the shape of retrieval signal did not change with the increase of storage time at two-photon resonance.Under the condition of 0.48 MHz two-photon detuning,the retrieval signal appeard periodically distortion with the increase of storage time and the period was about 2μs.These researches have provided experimental references for the quantum memory of continuous variables in the hot atom ensemble.

关 键 词：电磁感应光透明 双光子失谐 存储时间 恢复效率 

分 类 号：O431[机械工程—光学工程]