论文标题
白炽暂时的超材料
Incandescent temporal metamaterials
论文作者
论文摘要
被视为在空间塑造物质的有前途的替代方案，可以抓住时变介质来控制和操纵波浪现象，包括热辐射。在这里，基于宏观量子电动力学的框架，我们详细阐述了一种综合的量子理论表述，这是研究时间调节介质中热排放效应的基础。我们的理论揭示了随着时变的介质带来的新物理：在不同频率和位置的热波动电流之间的非平凡相关性，在有限温度下的热辐射克服了黑体光谱和量子真空效应。我们说明了这些特征如何导致惊人的现象和新型的热发射器，特别是表明，时间调制释放了限制在Epsilon-Near-near-Zero（ENZ）体内的强场波动，从而使狭窄的（部分相干）发射范围跨越了整个范围。
Regarded as a promising alternative to spatially shaping matter, time-varying media can be seized to control and manipulate wave phenomena, including thermal radiation. Here, based upon the framework of macroscopic quantum electrodynamics, we elaborate a comprehensive quantum theoretical formulation that lies the basis for investigating thermal emission effects in time-modulated media. Our theory unveils new physics brought about by time-varying media: nontrivial correlations between thermal fluctuating currents at different frequencies and positions, thermal radiation overcoming the black-body spectrum, and quantum vacuum amplification effects at finite temperature. We illustrate how these features lead to striking phenomena and novel thermal emitters, specifically, showing that the time-modulation releases strong field fluctuations confined within epsilon-near-zero (ENZ) bodies, and that, in turn, it enables a narrowband (partially coherent) emission spanning the whole range of wavevectors, from near to far-field regimes.
