Lee Joohye, Kim Jinuk, An Kyungwon
Department of Physics and Astronomy and Institute of Applied Physics, Seoul National University, Seoul, 08826, Korea.
Department of Physics, Yale University, New Haven, CT, 06520, USA.
Sci Rep. 2024 Feb 12;14(1):3471. doi: 10.1038/s41598-024-54008-w.
We observed the frequency pushing of the cavity resonance as a result of the coupling of the cavity field with the ground state Ba in a high-Q cavity. A weak probe laser propagated along the axis of a Fabry-Pérot cavity while ground-state barium atoms traversed the cavity mode perpendicularly. By operating the atom-cavity composite in the vicinity of an exceptional point, we could observe a greatly enhanced frequency shift of the cavity transmission peak, which was pushed away from the atomic resonance, resulting in up to 41 ± 7 kHz frequency shift per atom from the empty cavity resonance. We analyzed our results by using the Maxwell-Schrödinger equation and obtained good agreement with the measurements.
我们观察到，由于高Q腔中腔场与基态钡的耦合，导致了腔共振的频率推移。一束弱探测激光沿法布里-珀罗腔的轴传播，而基态钡原子垂直穿过腔模。通过在一个例外点附近操作原子-腔复合体，我们能够观察到腔传输峰的频率偏移大幅增强，该峰被推离原子共振，导致相对于空腔共振每个原子产生高达41±7千赫兹的频率偏移。我们使用麦克斯韦-薛定谔方程分析了我们的结果，并与测量结果取得了良好的一致性。
