Fluctuational electrodynamics of hyperbolic metamaterials
Fluctuational electrodynamics of hyperbolic metamaterials
复制标题
DOI：
10.1063/1.4883243
复制
发表时间：
2014-06
影响因子：
3.2
通讯作者：
Yu Guo;Z. Jacob
中科院分区：
文献类型：
--
作者：
Yu Guo;Z. Jacob
详细讨论了双曲型超材料的平衡和非平衡涨落电动力学。我们展示了两种不同方法的统一方面，一种是利用第二类波动耗散定理，另一种是利用散射方法。我们分析了在有限温度下双曲介质的近场，并表明，缺乏空间相干性可以归因于超普朗克热辐射的多模态性质。我们还采用了声子极化激元超晶格超材料的分析，并描述了适用于实验验证我们的预测效果的制度。结果表明，远场热发射光谱主要由ε-近零和ε-近极响应，正如基尔霍夫定律所预期的那样。我们的工作应该帮助理论家和实验学家研究复杂的介质和工程师的平衡和非平衡波动在热光子学的应用。
We give a detailed account of equilibrium and non-equilibrium fluctuational electrodynamics of hyperbolic metamaterials. We show the unifying aspects of two different approaches; one utilizes the second kind of fluctuation dissipation theorem and the other makes use of the scattering method. We analyze the near-field of hyperbolic media at finite temperatures and show that the lack of spatial coherence can be attributed to the multi-modal nature of super-Planckian thermal emission. We also adopt the analysis to phonon-polaritonic super-lattice metamaterials and describe the regimes suitable for experimental verification of our predicted effects. The results reveal that far-field thermal emission spectra are dominated by epsilon-near-zero and epsilon-near-pole responses as expected from Kirchoff's laws. Our work should aid both theorists and experimentalists to study complex media and engineer equilibrium and non-equilibrium fluctuations for applications in thermal photonics.