Gain narrowing in few-atom systems.
Gain narrowing in few-atom systems.
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少原子系统中的增益变窄。
DOI：
10.1103/physrevlett.98.103601
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发表时间：
2006
影响因子：
8.6
通讯作者：
A. Lagendijk
中科院分区：
文献类型：
--
作者：
T. Savels;A. Mosk;A. Lagendijk
使用密度矩阵的方法，我们研究了最简单的系统，显示增益和反馈：2至5个原子的集群，其中一个是泵浦。其他原子通过光的多次散射提供反馈。我们发现，如果原子在彼此的近场中，系统表现出大的增益窄化和光谱模式重新分布。如果反馈增强，观察到的现象会更加明显。据我们所知，我们的系统是最简单的精确可解的微观系统，它显示了激光振荡的方法。
Using a density matrix approach, we study the simplest systems that display both gain and feedback: clusters of 2 to 5 atoms, one of which is pumped. The other atoms supply feedback through multiple scattering of light. We show that, if the atoms are in each other's near field, the system exhibits large gain narrowing and spectral mode redistribution. The observed phenomena are more pronounced if the feedback is enhanced. Our system is to our knowledge the simplest exactly solvable microscopic system which shows the approach to laser oscillation.