Escarra Matthew D, Thongrattanasiri Sukosin, Charles William O, Hoffman Anthony J, Podolskiy Viktor A, Gmachl Claire
Department of Electrical Engineering, Princeton University, Princeton, NJ 08544, USA.
Opt Express. 2011 Aug 1;19(16):14990-8. doi: 10.1364/OE.19.014990.
All-semiconductor, highly anisotropic metamaterials provide a straightforward path to negative refraction in the mid-infrared. However, their usefulness in applications is restricted by strong frequency dispersion and limited spectral bandwidth. In this work, we show that by stacking multiple metamaterials of varying thickness and doping into one compound metamaterial, bandwidth is increased by 27% over a single-stack metamaterial, and dispersion is reduced.
全半导体、高度各向异性的超材料为中红外波段的负折射提供了一条直接途径。然而，它们在应用中的实用性受到强频率色散和有限光谱带宽的限制。在这项工作中，我们表明，通过将多种不同厚度和掺杂的超材料堆叠成一种复合超材料，带宽比单堆叠超材料增加了27%，并且色散减小。
