Colossal Enhancement of Near-Field Thermal Radiation Across Hundreds of Nanometers between Millimeter-Scale Plates through Surface Plasmon and Phonon Polaritons Coupling.,Nano Letters

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Colossal Enhancement of Near-Field Thermal Radiation Across Hundreds of Nanometers between Millimeter-Scale Plates through Surface Plasmon and Phonon Polaritons Coupling.
Nano Letters ( IF 9.6 ) Pub Date : 2019-10-25 , DOI: 10.1021/acs.nanolett.9b03269
Kezhang Shi ₁ , Yongcheng Sun ₂ , Zhaoyang Chen ₂ , Nan He _{1,

3} , Fanglin Bao ₂ , Julian Evans ₁ , Sailing He _{1,

2,

3,

4}

Affiliation

Coupling modes between surface plasmon polaritons (SPPs) and surface phonon polaritons (SPhPs) play a vital role in enhancing near-field thermal radiation but are relatively unexplored, and no experimental result is available. Here, we consider the NFTR enhancement between two identical graphene-covered SiO2 heterostructures with millimeter-scale surface area and report an experimentally record-breaking ∼64-fold enhancement compared to blackbody (BB) limit at a gap distance of 170 nm. The energy transmission coefficient and radiation spectra show that the physical mechanism behind the colossal enhancement is the coupling between the surface plasmon and phonon polaritons.

中文翻译：

通过表面等离激元和声子极化子耦合，跨毫米级板之间数百纳米的近场热辐射的巨大增强。

表面等离激元极化子（SPPs）和表面声子极化子（SPhPs）之间的耦合模式在增强近场热辐射中起着至关重要的作用，但相对来说还没有被探索，并且没有实验结果可用。在这里，我们考虑了两个相同的石墨烯覆盖的SiO2异质结构（毫米级表面积）之间的NFTR增强，并报告了在170 nm的间隙距离处，相对于黑体（BB）极限，实验性的破纪录的〜64倍增强。能量传输系数和辐射光谱表明，巨大增强背后的物理机制是表面等离子体激元与声子极化子之间的耦合。

更新日期：2019-10-25

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