Department of Physics and Astronomy, Seoul National University, Seoul 151-747, Korea.
Phys Rev Lett. 2012 Dec 14;109(24):243601. doi: 10.1103/PhysRevLett.109.243601. Epub 2012 Dec 12.
We report the first experimental observation of the cavity-QED microlaser spectrum, specifically the unconventional frequency pulling brought by a strong atom-cavity coupling at off resonance. The pulling is enhanced quadratically by the atom-cavity coupling to result in a sensitive response to the number of pumping atoms (2.1 kHz per atom maximally). Periodic variation of the pulling due to the coherent Rabi oscillation is also observed as the number of pumping atoms is increased across multiple thresholds.
我们首次观察到了腔量子电动力学微激光光谱，特别是在失谐时由强原子-腔耦合带来的非传统频率牵引。原子-腔耦合使牵引增强了两倍，从而对泵浦原子的数量产生了灵敏的响应（最大每原子 2.1 kHz）。随着泵浦原子数量跨越多个阈值增加，由于相干拉比振荡而产生的牵引的周期性变化也被观察到。
