Hubarevich Aliaksandr, Kukhta Aliaksandr, Demir Hilmi Volkan, Sun Xiaowei, Wang Hong
Opt Express. 2015 Apr 20;23(8):9753-61. doi: 10.1364/OE.23.009753.
An ultra-thin nanostructured plasmonic light absorber with an insulator-metal-insulator-metal (IMIM) architecture is designed and numerically studied. The IMIM structure is capable to absorb up to about 82.5% of visible light in a broad wavelength range of 300-750 nm. The absorption by the bottom metal is only 6% of that of the top metal. The results show that the IMIM architecture has weak dependence of the angle of the incident light. Interestingly, by varying the top insulator material the optical absorption spectrum can be shifted more than 180 nm as compared to the conventional air-metal-insulator-metal structure. The IMIM structure can be applied for different plasmonic devices with improved performance.
设计并对一种具有绝缘体-金属-绝缘体-金属（IMIM）结构的超薄纳米结构等离子体光吸收器进行了数值研究。该IMIM结构能够在300 - 750 nm的宽波长范围内吸收高达约82.5%的可见光。底部金属的吸收仅为顶部金属吸收的6%。结果表明，IMIM结构对入射光角度的依赖性较弱。有趣的是，与传统的空气-金属-绝缘体-金属结构相比，通过改变顶部绝缘体材料，光吸收光谱可以移动超过180 nm。IMIM结构可应用于性能得到改善的不同等离子体器件。
