论文标题
用金属纳米颗粒装饰的石墨烯的光谱选择性热排放
Spectrally Selective Thermal Emission from Graphene Decorated with Metallic Nanoparticles
论文作者
论文摘要
我们在过去的工作中表明，纳米平方的单层石墨烯（NPG）可从3至12 $μ$ m的中红外（MID-IR）中进行频谱选择性热发射。在这种情况下，光谱选择是通过石墨烯内部的局部表面等离子体（LSP）共振实现的。在这里，我们表明，用金属纳米颗粒（例如Ag纳米纸或纳米球）装饰的石墨烯也可以实现光谱选择性的热发射，但在这种情况下，通过声学石墨烯等基质（AGP）（AGP）位于石墨烯和Ag纳米粒子之间的介电材料中。我们的有限分差时间域（FDTD）计算表明，可以通过门电压将频谱选择性的热辐射排放调整为两个不同的波长状态，即在大气上不透明的$λ= 5 $ $ $ $ $ $ $ $ m和$ up $ m和$λ= 8 $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ = 8 $μ$ m。这允许在辐射热诱捕模式之间进行电动切换，以便为后一种制度的辐射式冷却模式和辐射冷却模式。我们的理论结果可用于开发用于智能织物的基于石墨烯的热管理系统。
We showed in past work that nanopatterned monolayer graphene (NPG) enables spectrally selective thermal emission in the mid-infrared (mid-IR) from 3 to 12 $μ$m. In that case the spectral selection is realized by means of the localized surface plasmon (LSP) resonances inside graphene. Here we show that graphene decorated with metallic nanoparticles, such as Ag nanocubes or nanospheres, also realize spectrally selective thermal emission, but in this case by means of acoustic graphene plasmons (AGPs) localized between graphene and the Ag nanoparticle inside a dielectric material. Our finite-difference time domain (FDTD) calculations show that the spectrally selective thermal radiation emission can be tuned by means of a gate voltage into two different wavelength regimes, namely the atmospherically opaque regime between $λ=5$ $μ$m and $λ=8$ $μ$m or the atmospherically transparent regime between $λ=8$ $μ$m and $λ=12$ $μ$m. This allows for electric switching between radiative heat trapping mode for the fomer regime and radiative cooling mode for the latter regime. Our theoretical results can be used to develop graphene-based thermal management systems for smart fabrics.
