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Ultra-broadband, wide-angle, and polarization-insensitive metamaterial perfect absorber for solar energy harvesting
Journal of Nanophotonics ( IF 1.5 ) Pub Date : 2020-12-15 , DOI: 10.1117/1.jnp.14.046014
Saad Zahraw Sekhi 1 , Mehrdad Shokooh-Saremi 1 , Mir Mojtaba Mirsalehi 1
Affiliation  

Abstract. An ultra-broadband perfect absorber for visible to near-infrared light utilizing a metamaterial nanostructure is theoretically proposed and numerically analyzed. The absorber consists of a square and plus shape layer of Ti-Al2O3 (top layer) and a thin layer of Cr located on a SiO2 layer over a TiN substrate. By ameliorating the dimensions of the design, an average absorption of 95.4% is attained for wavelengths from 400 to 1800 nm, with a peak absorption of about 100%. Also, the bandwidths corresponding to the absorption above 90% and 99% are 1317 and 773 nm, respectively. The cooperative effects of the corresponding localized plasmonic resonances and the propagating surface plasmons of Ti resonators subsidize to the absorption response. Furthermore, the spectral response of the proposed nanostructure is insensitive to incident angle and independent of polarization angle. The proposed absorber has application prospects in photovoltaic devices, solar energy harvesting, and light trapping.

中文翻译:

用于太阳能收集的超宽带、广角和偏振不敏感超材料完美吸收器

摘要。理论上提出了一种利用超材料纳米结构的可见光到近红外光的超宽带完美吸收器,并进行了数值分析。吸收体由正方形和正形状的 Ti-Al2O3 层(顶层)和位于 TiN 衬底上的 SiO2 层上的 Cr 薄层组成。通过改进设计尺寸,400 至 1800 nm 波长的平均吸收率为 95.4%,峰值吸收率约为 100%。此外,对应于 90% 和 99% 以上吸收的带宽分别为 1317 和 773 nm。相应的局部等离子体共振和 Ti 共振器的传播表面等离子体的协同效应对吸收响应进行了补贴。此外,所提出的纳米结构的光谱响应对入射角不敏感并且与偏振角无关。所提出的吸收器在光伏器件、太阳能收集和光捕获方面具有应用前景。
更新日期:2020-12-15
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