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arXiv 2210.05565physics.opticsquant-ph
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白炽时间超材料

Incandescent temporal metamaterials

J. Enrique Vázquez-Lozano, Iñigo Liberal

AI总结:

本文基于宏观量子电动力学建立时间调制介质热辐射的量子理论,揭示跨频跨位电流关联、超黑体辐射及真空放大,并提出可全波矢窄带发射的ENZ白炽时间超材料。

摘要:

时变介质被视为空间塑形物质的一种有前景的替代方案,可用于控制和操纵包括热辐射在内的波动现象。本文基于宏观量子电动力学框架,阐述了一套完整的量子理论表述,为研究时间调制介质中的热发射效应奠定基础。我们的理论揭示了时变介质带来的新物理:不同频率和位置处热涨落电流之间的非平凡关联、超越黑体谱的热辐射,以及有限温度下的量子真空放大效应。我们阐明这些特征如何产生引人注目的现象和新型热发射器,具体表明时间调制释放了限制在 ε-near-zero(ENZ,介电常数近零)物体内部的强场涨落,并进而实现覆盖从近场到远场区域全部波矢范围的窄带(部分相干)发射。

英文摘要:

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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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