Tungsten-based highly selective solar absorber using simple nanodisk array

• DOI: 10.1364/oe.25.0a1072
• Publication Date: 2017-10-31T20:08:14Z
• Authors: Xu Han; Kebo He; Zhubing He; Zhaoyu Zhang
• Keywords: Selective surface; Absorptance

In this paper, we report the design, fabrication, and characterization of a tungsten-based metamaterial selective solar absorber (SSA) combining metal-insulator-metal (MIM) structure simple nanodisk array. The as-fabricated absorbs strongly selectively in wavelength range 0.5-1.75 μm with characterized absorptance more than 90%, which drops abruptly to less 12.6% beyond 2.5 μm. addition, broadband highly is polarization-insensitive under incidence normal plane waves. Moreover, selectivity remains invariable up 40°, beneficial for thermal applications. These properties are verified theoretically experimentally present work. Further analysis on energy dissipation reveals underlying physics optical performances.