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Near-field photonic cooling through control of the chemical potential of photons

机译：通过控制光子的化学势进行近场光子冷却

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摘要

Photonic cooling of matter has enabled both access to unexplored states of matter, such as Bose-Einstein condensates, and novel approaches to solid-state refrigeration(1-3). Critical to these photonic cooling approaches is the use of low-entropy coherent radiation from lasers, which makes the cooling process thermodynamically feasible(4-6). Recent theoretical work(7-9) has suggested that photonic solid-state cooling may be accomplished by tuning the chemical potential of photons without using coherent laser radiation, but such cooling has not been experimentally realized. Here we report an experimental demonstration of photonic cooling without laser light using a custom-fabricated nanocalorimetric device and a photodiode. We show that when they are in each other's near-field-that is, when the size of the vacuum gap between the planar surfaces of the calorimetric device and a reverse-biased photodiode is reduced to tens of nanometres-solid-state cooling of the calorimetric device can be accomplished via a combination of photon tunnelling, which enhances the transport of photons across nanoscale gaps, and suppression of photon emission from the photodiode due to a change in the chemical potential of the photons under an applied reverse bias. This demonstration of active nanophotonic cooling-without the use of coherent laser radiation-lays the experimental foundation for systematic exploration of nanoscale photonics and optoelectronics for solid-state refrigeration and on-chip device cooling.
机译：物质的光子冷却不仅可以访问未探索的物质状态（例如玻色-爱因斯坦冷凝物），还可以使用新型的固态制冷方法（1-3）。这些光子冷却方法的关键是使用激光的低熵相干辐射，这使得冷却过程在热力学上可行（4-6）。最近的理论工作（7-9）提出，可以通过调节光子的化学势而不使用相干激光辐射来完成光子固态冷却，但是这种冷却尚未通过实验实现。在这里，我们报告了使用定制的纳米量热装置和光电二极管进行的无激光光子冷却的实验演示。我们表明，当它们在彼此的近场中时，也就是说，当量热器件的平面与反向偏置的光电二极管之间的真空间隙的大小减小到数十纳米时，固态冷却可以通过光子隧穿的组合来实现量热装置，光子隧穿可增强光子跨纳米级间隙的传输，并抑制由于施加的反向偏压下光子化学势的变化而导致的从光电二极管发出的光子发射。有源纳米光子冷却的演示（不使用相干激光辐射）为系统探索用于固态制冷和芯片上器件冷却的纳米级光子学和光电子学奠定了实验基础。

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  • 来源
    《Nature》 |2019年第7743期|239-244|共6页
  • 作者

    Zhu Linxiao; Fiorino Anthony; Thompson Dakotah; Mittapally Rohith; Meyhofer Edgar; Reddy Pramod;

  • 作者单位

    Univ Michigan, Dept Mat Sci & Engn, Ann Arbor, MI 48109 USA;

    Univ Michigan, Dept Mech Engn, Ann Arbor, MI 48109 USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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  • 正文语种 eng
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