Steady-state superradiance with Rydberg polaritons
Steady-state superradiance with Rydberg polaritons
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里德伯极化激元的稳态超辐射
DOI：
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发表时间：
2016
期刊：
影响因子：
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通讯作者：
A. Gorshkov
中科院分区：
文献类型：
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作者：
Zhexuan Gong;Minghui Xu;M. Foss;J. K. Thompson;A. Rey;M. Holland;A. Gorshkov
稳态超辐射激光器可以产生超窄线宽的光，在量子信息和精密计量等领域有着重要的应用。然而，这种激光器产生的光本质上仍然是经典的。在这里，我们表明，一个里德伯介质的引入到一个腔中含有原子与一个狭窄的光学过渡可以导致超窄线宽$非经典$光的稳态超辐射发射。由里德伯介质引起的腔非线性强烈地改变了超辐射阈值，并导致腔输出光谱中的Mollow三重态，这种行为可以被理解为共振荧光的一种不寻常的模拟。腔输出光谱具有非常尖锐的中心峰，其线宽可以远窄于经典超辐射激光器的线宽。这种前所未有的光谱清晰度，加上光的非经典性质，可能会导致新的应用，其中光谱纯量子光是理想的。
A steady-state superradiant laser can be used to generate ultranarrow-linewidth light, and thus has important applications in the fields of quantum information and precision metrology. However, the light produced by such a laser is still essentially classical. Here, we show that the introduction of a Rydberg medium into a cavity containing atoms with a narrow optical transition can lead to the steady-state superradiant emission of ultranarrow-linewidth $nonclassical$ light. The cavity nonlinearity induced by the Rydberg medium strongly modifies the superradiance threshold, and leads to a Mollow triplet in the cavity output spectrum$-$this behavior can be understood as an unusual analogue of resonance fluorescence. The cavity output spectrum has an extremely sharp central peak, with a linewidth that can be far narrower than that of a classical superradiant laser. This unprecedented spectral sharpness, together with the nonclassical nature of the light, could lead to new applications in which spectrally pure $quantum$ light is desired.