In recent decades, researchers have demonstrated incandescent sources that exhibit monochromatic, directional, and even fast modulated infrared emission. Most of the researchers achieve this type of emission by heating the whole device. Here, we propose heating only nanovolumes that can be cooled in a few tens of nanoseconds. This approach could enable high-speed modulation. To compensate for the weak thermal emission of such isolated nanoemitters, we propose inserting the hot nanovolume in the gap of a cold nanoantenna. We calculate the resulting emission enhancement by using a generalized version of Kirchhoff’s law, and demonstrate that careful design of the complete antenna–nanoemitter system can result in emission enhancements of more than four orders of magnitude.

中文翻译：

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使用纳米天线增强热辐射，以产生具有高调制率的红外源

近几十年来，研究人员已经证明了白炽灯光源具有单色，定向甚至快速调制的红外发射。大多数研究人员通过加热整个设备来实现这种类型的发射。在这里，我们建议仅加热可以在几十纳秒内冷却的纳米体积。这种方法可以实现高速调制。为了补偿此类隔离的纳米发射器的弱热发射，我们建议将热的纳米体积插入冷的纳米天线的间隙中。我们通过使用基尔霍夫定律的广义形式来计算最终的发射增强，并证明，仔细设计完整的天线-纳米发射器系统可以导致发射增强超过四个数量级。