论文标题
电热元面的设计和分析
Design and analysis of electrothermal metasurfaces
论文作者
论文摘要
由于电热元面积由于能够动态控制热红外辐射而引起了广泛的关注。尽管以前的研究主要集中在具有无限单元细胞的元整日上，但有限尺寸的效应可能是开发具有快速响应和较大温度均匀性的热跨面的关键设计因素。在这里，我们研究了由具有有限阵列大小的金纳米棒组成的热元面积，只有几个时期就可以实现接近无限情况的共振。更重要的是，由于有限阵列大小，因此如此小的足迹导致响应时间降低到纳秒级。此外，发现垂直于纳米棒轴的方向的单位细胞数量对共振和响应时间不敏感，从而提供了长宽比的可调性，从而可以提高亚kelvin水平的温度均匀性。
Electrothermal metasurfaces have attracted extensive attention due to their ability to dynamically control thermal infrared radiation. Although previous studies were mainly focused on the metasurfaces with infinite unit cells, the finite-size effect can be a critical design factor for developing thermal metasurfaces with fast response and broad temperature uniformity in practice. Here, we study the thermal metasurfaces consisting of gold nanorods with a finite array size, which, with only several periods, can achieve a resonance close to that of the infinite case. More importantly, such a small footprint due to the finite array size results in the response time down to a nanosecond level. Furthermore, the number of the unit cells in the direction perpendicular to the axis of the nanorods is found to be insensitive to the resonance and response time, thus providing a tunability in aspect ratio that can boost the temperature uniformity in the sub-Kelvin level.
