巨大的近场辐射热传输由合的极子介导,具有超高动态范围
Wenbin Zhang1, Boxiang Wang1,2, Shenghao Jin1
1Institute of Engineering Thermophysics, School of Mechanical Engineering, MOE Key Laboratory for Power Machinery and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China.
Advanced materials (Deerfield Beach, Fla.)
|July 31, 2024
概括
这项研究实验证明,合的极子显著增强近场辐射热传递 (NFRHT),超过黑体极限300倍以上. 使用偏差电压实现了NFRHT的动态控制,为热计算开辟了道路.
科学领域:
- 凝聚物质物理学 凝聚物质物理学
- 纳米尺度的热传递转移.
- 量子电动力学 量子电动力学
背景情况:
- 近场辐射热传递 (NFRHT) 可以超越黑体极限由于 evanescent 波.
- 理论上预测,合的极子会显著增强NFRHT.
- 对波拉里顿介导的NFRHT增强缺乏实验验证.
研究的目的:
- 通过实验证明和量化由合的极子介导的NFRHT增强.
- 在这些系统中研究NFRHT的动态调制性.
- 为NFRHT中合的极力图效应提供实验证据.
主要方法:
- 在平面配置中制造毫米尺寸的石墨烯/SiC/SiO2复合器件.
- 在纳米尺度间隙 (87 nm) 测量NFRHT.
- 使用散射式扫描近场光学显微镜 (s-SNOM) 和全波数值模拟.
主要成果:
- 在黑体极限上实现了302.8±35.2倍的NFRHT增强.
- 达到创纪录的辐射热导电率 (0.136 WK-1) 和有效间隙传热系数 (5440 Wm-2K-1).
- 用偏差电压证明了NFRHT的动态调节,实现了≈4.115.5的动态范围.
结论:
- 结合的极立子在显著增强NFRHT方面发挥着至关重要的作用.
- 证明了NFRHT的动态控制,为先进的热管理提供了可能性.
- 这项工作为纳米级热传输,能量转换和热计算的应用铺平了道路.
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