双曲黑体
Hyperbolic blackbody
摘要：
本文重新讨论了单轴各向异性介质中热电磁场的黑体理论，该介质与热浴处于热平衡。当这些介质是双曲的，我们表明，这些领域的光谱能量密度从根本上不同于普朗克的黑体理论预测。我们证明，他们的频谱能量密度的最大值移向频率小于维恩的频率，使这些媒体显然更冷。最后，我们推导出Stefan-Boltzmann定律的双曲型介质成为一个二次函数的热浴温度。
英文摘要：
The blackbody theory is revisited in the case of thermal electromagnetic fields inside uniaxial anisotropic media in thermal equilibrium with a heat bath. When these media are hyperbolic, we show that the spectral energy density of these fields radically differs from that predicted by Planck's blackbody theory. We demonstrate that the maximum of their spectral energy density is shifted towards frequencies smaller than Wien's frequency making these media apparently colder. Finally, we derive Stefan-Boltzmann's law for hyperbolic media which becomes a quadratic function of the heat bath temperature.
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