Shi Kezhang, Sun Yongcheng, Chen Zhaoyang, He Nan, Bao Fanglin, Evans Julian, He Sailing
Centre for Optical and Electromagnetic Research, State Key Laboratory of Modern Optical Instrumentation , Zhejiang University , Hangzhou 310058 , China.
Centre for Optical and Electromagnetic Research, ZJU-SCNU Joint Center of Photonics, South China Academy of Advanced Optoelectronics , South China Normal University , Guangzhou 510006 , China.
Nano Lett. 2019 Nov 13;19(11):8082-8088. doi: 10.1021/acs.nanolett.9b03269. Epub 2019 Oct 25.
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 SiO 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.
表面等离激元极化激元（SPPs）与表面声子极化激元（SPhPs）之间的耦合模式在增强近场热辐射方面起着至关重要的作用，但目前研究相对较少，且尚无实验结果。在此，我们考虑了两个具有毫米级表面积的相同石墨烯覆盖的SiO异质结构之间的近场热辐射增强，并报告了在170 nm的间隙距离下，与黑体（BB）极限相比，实验上破纪录的约64倍增强。能量传输系数和辐射光谱表明，这种巨大增强背后的物理机制是表面等离激元和声子极化激元之间的耦合。
