吸收型光子开关的量子干涉观测
Observation of absorptive photon switching by quantum interference
摘要：
我们报告了一个实验演示的光子开关的量子干涉在一个四能级原子系统提出的哈里斯和山本（物理评论Lett。81，3611（1998））。在四能级系统中，量子干涉抑制单光子吸收，但增强三阶双光子型吸收。我们观察到在冷~（87）Rb原子实现的四能级系统中，非线性吸收大大增强，并且用脉冲泵浦激光演示了非线性吸收的快速开关。
英文摘要：
We report an experimental demonstration of photon switching by quantum interference in a four-level atomic system proposed by Harris and Yamamoto (Phys. Rev. Lett. 81, 3611 (1998)). Quantum interference inhibits single-photon absorption but enhances third-order, two-photon type absorption in the four-level system. We have observed greatly enhanced nonlinear absorption in the four-level system realized with cold 87Rb atoms and demonstrated fast switching of the nonlinear absorption with a pulsed pump laser.
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