Abstract

The inherent bandwidth limitations make it quite challenging to achieve the wideband response of metamaterial absorbers. In this paper, a metamaterial absorber based on triangular metallic rings has been proposed to attain wideband absorption (${\gt}{{90}}\%$) in the wavelength span of 400–750 nm. The absorber is constituted of periodically placed unit cells, where each unit cell contains three concentric triangular chromium metal rings. The absorption of the design remains stable (above 70%) over a wide range of incidence obliquity (0°–60°) under transverse electric (TE) and transverse magnetic (TM) polarization. Further, the absorber shows polarization-insensitive behavior over different polarization states. The low-cost and thermally endurable chromium metal, wide absorption, and wide-angle stability make the proposed absorber a suitable candidate for applications like solar energy harvesting, solar detectors, solar thermal photovoltaics, and photonic devices.

© 2021 Optica Publishing Group

Ultrawideband fractal metamaterial absorber made of nickel operating in the UV to IR spectrum

Muhammad Ashar Naveed, Rana Muhammad Hasan Bilal, Muhammad Abuzar Baqir, Muhammad Mehran Bashir, Muhammad Mahmood Ali, and Arbab Abdur Rahim
Opt. Express 29(26) 42911-42923 (2021)

Polarization- and angle-insensitive ultrabroadband perfect metamaterial absorber for thermophotovoltaics

Ashish Kumar Chowdhary, Tanmay Bhowmik, and Debabrata Sikdar
J. Opt. Soc. Am. B 38(2) 327-335 (2021)

Ultra-broadband metamaterial absorber based on cross-shaped TiN resonators

Samira Mehrabi, Mir Hamid Rezaei, and Abbas Zarifkar
J. Opt. Soc. Am. A 37(4) 697-704 (2020)

Broadband wide-angle polarization-insensitive metasurface solar absorber

M. H. Heidari and S. H. Sedighy
J. Opt. Soc. Am. A 35(4) 522-525 (2018)

Broadband terahertz metamaterial absorber: design and fabrication

Yanqing Qiu, Jinfeng Wang, Meiyu Xiao, and Tingting Lang
Appl. Opt. 60(32) 10055-10061 (2021)