Dynamic Thermal Emission Control Based on Ultrathin Plasmonic Metamaterials Including Phase-Changing Material GST
Dynamic Thermal Emission Control Based on Ultrathin Plasmonic Metamaterials Including Phase-Changing Material GST
复制标题
基于超薄等离子体超材料（包括相变材料 GST）的动态热发射控制
DOI：
10.1002/lpor.201700091
复制
发表时间：
2017-09-01
影响因子：
11
通讯作者：
Qiu, Min
中科院分区：
文献类型：
--
作者：
Qu, Yurui;Li, Qiang;Qiu, Min
动态热辐射控制在辐射冷却、热光防护和自适应伪装等领域引起了越来越多的关注。以前的动态热发射控制演示存在厚度大或需要持续的电或热激励的缺点。本文提出了一种基于金属-绝缘体-金属等离子体超材料的零静态功率中红外热发射器，该热发射器采用相变材料GST实现对热发射的动态控制。电磁模式可以通过控制温度确定的中间相位连续调谐。一个典型的共振模式，其中涉及的高阶磁共振和抗反射共振之间的耦合，从6.51到9.33 m的位移，而GST是从非晶相调谐到结晶相。该演示将为基础科学领域和许多能量收集应用中的动态热排放控制铺平道路。
Dynamic thermal emission control has attracted growing interest in a broad range of fields, including radiative cooling, thermophotovoltaics and adaptive camouflage. Previous demonstrations of dynamic thermal emission control present disadvantages of either large thickness or requiring sustained electrical or thermal excitations. In this paper, an ultrathin (approximate to 0.023, is the emission peak wavelength) metal-insulator-metal plasmonic metamaterial-based zero-static-power mid-infrared thermal emitter incorporating phase-changing material GST is experimentally demonstrated to dynamically control the thermal emission. The electromagnetic modes can be continuously tuned through the intermediate phases determined by controlling the temperature. A typical resonance mode, which involves the coupling between the high-order magnetic resonance and anti-reflection resonance, shifts from 6.51 to 9.33 m while GST is tuned from amorphous to crystalline phase. This demonstration will pave the way towards the dynamical thermal emission control in both the fundamental science field and a number of energy-harvesting applications.