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在冷温度下,通过表面Phonon Polariton介导的近场辐射热传递
Shen Yan1, Yuxuan Luan1, Ju Won Lim2
1Department of Mechanical Engineering, University of Michigan, Ann Arbor, Michigan 48109, USA.
Physical review letters
|November 24, 2023
概括
在低温温度下通过表面声波极子 (SPhPs) 探索近场辐射热传递 (NFRHT). 结果显示,SPhP对NFRHT有着显著的贡献,使新的热管理应用成为可能.
科学领域:
- 凝聚物质物理学 凝聚物质物理学
- 在纳米尺度的热传输.
- 量子热力学就是量子热力学.
背景情况:
- 通过表面声波极子 (SPhPs) 的近场辐射热传递 (NFRHT) 在室温下明显超过黑体极限.
- 在冷温度下对SPhP介导的NFRHT缺乏实验性研究.
研究的目的:
- 在低温温度 (77-300 K) 的纳米尺度间隙中实验性地研究NFRHT.
- 了解SPhP在低温NFRHT中的作用及其温度依赖性.
- 开发用于应用的低温条件下预测NFRHT的模型.
主要方法:
- 使用球和平面表面制造纳米尺度间隙.
- 实验测量了穿过这些间隙的热传输,从77K到300K.
- 使用波动电动学和分析方法进行理论建模.
主要成果:
- 低温NFRHT显示了SPhP的显著贡献.
- 低温NFRHT的温度依赖性偏离了远场辐射的T3缩放.
- 热传递局限于特定的频率范围,通过简单的分析模型来解释.
结论:
- 在冷温度下,SPhP介导的NFRHT具有显著的作用.
- 了解低温NFRHT对于先进的热管理和固态冷却至关重要.
- 开发的模型为研究在冷环境中的NFRHT提供了一个框架.
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