Spatial dynamics, thermalization, and gain clamping in a photon condensate
Spatial dynamics, thermalization, and gain clamping in a photon condensate
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DOI：
10.1103/physreva.93.013829
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发表时间：
2016-01-14
影响因子：
2.9
通讯作者：
Kirton, Peter
中科院分区：
文献类型：
--
作者：
Keeling, Jonathan;Kirton, Peter
我们从理论上研究了泵浦光斑的大小和位置对光子凝聚的影响。通过对非均匀分子激发分数的研究，我们弄清了光子凝聚体中空间平衡、增益钳制和热化之间的关系。这提供了对最近几个实验结果的简单理解。我们发现，随着热化作用的破坏，增益钳制是不完善的，导致“横向空间烧孔”和多模凝聚。这开启了设计增益分布以控制凝析油结构的可能性。
We study theoretically the effects of pump-spot size and location on photon condensates. By exploring the inhomogeneous molecular excitation fraction, we make clear the relation between spatial equilibration, gain clamping, and thermalization in a photon condensate. This provides a simple understanding of several recent experimental results. We find that as thermalization breaks down, gain clamping is imperfect, leading to "transverse spatial hole burning" and multimode condensation. This opens the possibility of engineering the gain profile to control the condensate structure.