Entropic thermodynamics of nonlinear photonic chain networks
Entropic thermodynamics of nonlinear photonic chain networks
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DOI：
10.1038/s42005-020-00484-1
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发表时间：
2020-11
影响因子：
5.5
通讯作者：
Fan O. Wu;P. Jung;M. Parto;M. Khajavikhan;D. Christodoulides
中科院分区：
文献类型：
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作者：
Fan O. Wu;P. Jung;M. Parto;M. Khajavikhan;D. Christodoulides
重多模光子结构的卷积非线性行为是近年来研究的热点。与这种多模系统相关的复杂性使它们能够显示大量在少数模式设置中不可能出现的现象。然而，与此同时，它在理解和利用它们的反应方面带来了一系列根本挑战。在这里，我们开发了一个光学热力学方法，能够描述大规模非线性光子紧束缚网络的热化动力学。对于这个特定的系统，获得了一个光学Sackur-Tetrode方程，该方程明确地提供了光子气体的光学温度和化学势。过程，如等熵膨胀/压缩，焦耳膨胀，以及与光束清洗/冷却和热传导效应在这样的链网络的方面进行了讨论。我们的结果可以用来描述在一个毫不费力的方式非常复杂的动力学高度多模非线性玻色子系统。
The convoluted nonlinear behaviors of heavily multimode photonic structures have been recently the focus of considerable attention. The sheer complexity associated with such multimode systems, allows them to display a host of phenomena that are otherwise impossible in few-mode settings. At the same time, however, it introduces a set of fundamental challenges in terms of comprehending and harnessing their response. Here, we develop an optical thermodynamic approach capable of describing the thermalization dynamics in large scale nonlinear photonic tight-binding networks. For this specific system, an optical Sackur-Tetrode equation is obtained that explicitly provides the optical temperature and chemical potential of the photon gas. Processes like isentropic expansion/compression, Joule expansion, as well as aspects associated with beam cleaning/cooling and thermal conduction effects in such chain networks are discussed. Our results can be used to describe in an effortless manner the exceedingly complex dynamics of highly multimoded nonlinear bosonic systems.