Abstract

We propose an ultra-broadband super light absorber by integrating different-sized tapered hyperbolic metamaterial (HMM) waveguides, each of which has a different and wide absorption band due to broadband slow-light response, into a unit cell. We numerically demonstrate that such an absorber is superior to a single-sized HMM absorber in terms of absorption bandwidth, while maintaining a comparable absorption efficiency. A three different-sized HMM absorber presents the capability of working with an ultra-wide frequency band ranging from 1 to 30 THz, which is much larger than previously proposed absorbers working in the same spectral region. Such a design shows great promise for a broad range of applications such as thermal emitters, photovoltaics, optical-chemical energy harvesting, and stealth technology, where ultra-wideband absorption is in very high demand.

© 2015 IEEE

Wide-angle broadband absorber based on uniform-sized hyperbolic metamaterial

Yan-Lin Liao, Yan Zhao, Shan Wu, and Sujuan Feng
Opt. Mater. Express 8(9) 2484-2493 (2018)

Ultrabroad terahertz bandpass filter by hyperbolic metamaterial waveguide

Xuetong Zhou, Xiang Yin, Tian Zhang, Lin Chen, and Xun Li
Opt. Express 23(9) 11657-11664 (2015)

Ultra-broadband metamaterial absorber from ultraviolet to long-wave infrared based on CMOS-compatible materials

Song Yue, Maojing Hou, Ran Wang, Huifang Guo, Yu Hou, Man Li, Zhe Zhang, Yu Wang, and Zichen Zhang
Opt. Express 28(21) 31844-31861 (2020)

Tungsten based anisotropic metamaterial as an ultra-broadband absorber

Yinyue Lin, Yanxia Cui, Fei Ding, Kin Hung Fung, Ting Ji, Dongdong Li, and Yuying Hao
Opt. Mater. Express 7(2) 606-617 (2017)

Ultra-broadband infrared absorption by tapered hyperbolic multilayer waveguides

Huixu Deng, Cherian J. Mathai, Shubhra Gangopadhyay, Jie Gao, and Xiaodong Yang
Opt. Express 26(5) 6360-6370 (2018)