欢迎您！东篱公司
退出
-
申报数据库
-
立项数据库
-
成果数据库
-
项目获奖数据库
中文摘要：
利用电磁感应透明（EIT）效应在87Rb热原子气室中进行了慢光和光存储的实验研究,在单光子红失谐650 MHz处测量了双光子失谐对光脉冲延迟和光存储的影响.结果表明：在双光子失谐0—0.5 MHz范围内存在显著的光脉冲延迟和光存储恢复信号,其慢光波形与理论计算结果基本相符;而恢复光脉冲信号随着双光子失谐的变化出现形变,这是由于多个EIT子系统之间的干涉引起的.这一研究结果为连续变量光场在热原子系综中的存储提供了实验参考.
英文摘要：
Electromagnetically induced transparency（EIT） effect is an effective means to store light field into the atom ensemble. The extra noise introduced in the stored procedure can be suppressed greatly under the condition of large one-photon detuning and proper two-photon detuning. In this paper, we experimentally investigate the slow light and light storage in87 Rb vapor by using EIT effect, and study the effects of the two-photon detuning on light pulse delay and light memory at 650 MHz one-photon red detuning. In order to avoid some unwanted effects under the high optical depth condition, such as four-wave mixing, etc., the temperature of the atomic cell is controlled at 65 degrees Celsius. The experimental results show that the delay and the retrieval signals are significant in a two-photon detuning range from0 to 0.5 MHz. The pulse delay decreases with the increase of two-photon detuning. The delay is 0.36 μs at two-photon resonance, and it is 0.07 μs at 1 MHz two-photon detuning. We simulate the delayed light pulse by using a three-levelΛ-type EIT model. The shapes of the measured slow light are in agreement with the theoretical results. The retrieval signals are observed at different two-photon detunings. The shapes of the retrieval pulses change with the two-photon detuning. The shape variations of the retrieval pulses cannot be explained by the three-level EIT theoretical model.By considering the atomic Zeeman sublevels interacting with the left-circular and right-circular polarized components of probe and coupling fields, multiple Λ-type EIT systems will be formed. The interference between the retrieval signals from multiple EIT subsystems causes the shape distortions of retrieval pulses. The retrieval efficiency is measured as a function of two-photon detuning. The retrieval efficiency oscillates, and multiple peaks appear with the increase of two-photon detuning. The first peak appears at two-photon resonance, and the second peak appears at 0.48 MHz two-photon detuning. Finally, we measure the retr
同期刊论文项目
同项目期刊论文
Stable continuous-wave singl e-frequency Nd:YAG blue laser at 473 nm considering the influence of th
Determination of the rotational constant of the Cs2 0g - (6s1/2 + 6p3/2) state by trap loss spectros
Continuous variable entanglement enhancement and manipulation by a subthreshold Type II optical para
Efficient reflection via four-wave mixing in a Doppler-free electromagnetically-induced-transparency
Elimination of the degenerate trajectory of a single atom strongly stronfly coupled to a tilted TEM1
Multi-normal-mode splitting of a cavity in the presence of atoms: A step towards the superstrong-cou
Light-induced atom desorption for cesium loading of a magneto-optical trap:Analysis and experimental
Phase-sensitive manipulations of the two-mode entangled state by a type-II nondegenerate optical par
Electromagnetically induced transparency without a Doppler background in a multilevel ladder-type ce
期刊信息
位置：