本文在87Rb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2 μs。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 87Rb hot vapor.When the temperature of 87Rb 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 2 μs.These researches have provided experimental references for the quantum memory of continuous variables in the hot atom ensemble.