Collective Radiative Dynamics of an Ensemble of Cold Atoms Coupled to an Optical Waveguide.
Collective Radiative Dynamics of an Ensemble of Cold Atoms Coupled to an Optical Waveguide.
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耦合到光波导的冷原子集合的集体辐射动力学。
DOI：
10.1103/physrevlett.128.073601
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发表时间：
2021
影响因子：
8.6
通讯作者：
A. Rauschenbeutel
中科院分区：
文献类型：
--
作者：
R. Pennetta;M. Blaha;A. Johnson;D. Lechner;P. Schneeweiss;J. Volz;A. Rauschenbeutel
本文从实验和理论上研究了冷原子系综与单模光纤耦合时的集体辐射效应。我们的分析揭示了系统的微观动力学，表明原子和单个被引导光子之间的集体相互作用沿着光传播方向沿着原子阵列逐渐建立。这些结果得到了时间分辨测量的光传输和反射的合奏后，通过纳米纤维引导的激光脉冲，其上升和下降时间短于原子寿命的激发。超辐射衰减超过1个数量级的速度比单原子自由空间的衰减率观察到的前向传播的引导模式中的发射，而在同一时间，没有加速的衰减率测量在向后的方向。此外，通过将纳米纤维耦合的原子阵列插入45米长的光纤环形谐振器中来执行传输通过原子的光的位置分辨测量，这使我们能够通过实验揭示原子系综的集体响应的逐步增长。我们的研究结果突出了纳米光子冷原子系统为集体光-物质相互作用的实验研究提供的独特机会。
We experimentally and theoretically investigate collective radiative effects in an ensemble of cold atoms coupled to a single-mode optical nanofiber. Our analysis unveils the microscopic dynamics of the system, showing that collective interactions between the atoms and a single guided photon gradually build up along the atomic array in the direction of propagation of light. These results are supported by time-resolved measurements of the light transmitted and reflected by the ensemble after excitation via nanofiber-guided laser pulses, whose rise and fall times are shorter than the atomic lifetime. Superradiant decays more than 1 order of magnitude faster than the single-atom free-space decay rate are observed for emission in the forward-propagating guided mode, while at the same time, no speed-up of the decay rate is measured in the backward direction. In addition, position-resolved measurements of the light that is transmitted past the atoms are performed by inserting the nanofiber-coupled atomic array in a 45-m-long fiber ring resonator, which allow us to experimentally reveal the progressive growth of the collective response of the atomic ensemble. Our results highlight the unique opportunities offered by nanophotonic cold atom systems for the experimental investigation of collective light-matter interaction.
影响因子：
8.6
作者：
W. Guerin;T. S. D. E. Santo;T. S. D. E. Santo;P. Weiss;A. Cipris;Johannes Schachenmayer;Robin Kaiser;Romain Bachelard;Romain Bachelard
通讯作者：
W. Guerin;T. S. D. E. Santo;T. S. D. E. Santo;P. Weiss;A. Cipris;Johannes Schachenmayer;Robin Kaiser;Romain Bachelard;Romain Bachelard