Department of Physics, Boston College, 140 Commonwealth Avenue, Chestnut Hill, Massachusetts 02467, USA.
Phys Rev Lett. 2011 Jul 22;107(4):045901. doi: 10.1103/PhysRevLett.107.045901. Epub 2011 Jul 18.
In this Letter we demonstrate, for the first time, selective thermal emitters based on metamaterial perfect absorbers. We experimentally realize a narrow band midinfrared (MIR) thermal emitter. Multiple metamaterial sublattices further permit construction of a dual-band MIR emitter. By performing both emissivity and absorptivity measurements, we find that emissivity and absorptivity agree very well as predicted by Kirchhoff's law of thermal radiation. Our results directly demonstrate the great flexibility of metamaterials for tailoring blackbody emission.
在这封信件中，我们首次展示了基于超材料完美吸收体的选择性热发射器。我们实验实现了窄带中红外（MIR）热发射器。多个超材料亚晶格进一步允许构建双频 MIR 发射器。通过进行发射率和吸收率测量，我们发现发射率和吸收率与热辐射的基尔霍夫定律的预测非常吻合。我们的结果直接证明了超材料在调整黑体发射方面的极大灵活性。
