In this work, we demonstrate that the near-field radiative heat transfer (NFRHT) between two graphene sheets can be modulated effectively, when the suspended sheets are subjected to mechanical strain. In this system, the isotropic optical properties of graphene dramatically change to be the in-plane anisotropy due to existence of the strain. The results suggest that the enhancement of NFRHT arises from the coupling of quasi-elliptic surface waves across the interfaces. We find that, by tuning the strain modulus or the stretching direction, the spectra of the heat transfer coefficient and the contour of energy transmission coefficient in k space are changed remarkably. These results indicate that the NFRHT is tunable. In a system whose strain is fixed at 23% and separation is 50 nm, a large change of NFRHT about 60% is achieved by tuning the stretching direction monotonously. Furthermore, we investigate the strain-induced modulation of the NFRHT under the different separat...

中文翻译：

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准椭圆石墨烯等离子体激元对近场辐射热传递的应变诱导调制

在这项工作中，我们证明了当悬浮的薄板受到机械应变时，可以有效地调节两个石墨烯薄板之间的近场辐射热传递（NFRHT）。在该系统中，由于应变的存在，石墨烯的各向同性光学性质急剧变化为面内各向异性。结果表明，NFRHT的增强来自跨界面的准椭圆形表面波的耦合。我们发现，通过调节应变模量或拉伸方向，k空间中的传热系数谱和能量传递系数的轮廓发生了显着变化。这些结果表明NFRHT是可调的。在应变固定为23％，间隔为50 nm的系统中，通过单调调整拉伸方向，可以将NFRHT的变化控制在大约60％。此外，我们研究了在不同分离条件下应变诱导的NFRHT的调控。