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Ultra-broadband plasmonic perfect absorber based on titanium-aluminum oxide strip multilayer structure

F. CHEN1,* , Y. XU1


  1. School of Physics and Optoelectronic Engineering, Yangtze University, Jingzhou, 434023, China


In this paper, an ultra-broadband perfect absorption has been demonstrated by using titanium-aluminum oxide ( Ti  Al2O3 ) strip grating metamaterial structure in the visible and near-infrared region. Numerical simulations of the finite-difference time-domain (FDTD) method indicate that perfect absorption with an average absorbance of 96.8 % can be achieved from 471 nm to 2278 nm, with 90 % absorption bandwidth over 1807 nm and the peak absorption is up to 99.6 %. Ultra-broadband perfect absorption is achieved due to the excitation of localized surface plasmon resonance and propagating surface plasmon resonance. Angle independent up to o 20 of the proposed absorber is also investigated. Moreover, the effects of geometrical sizes and metal material on absorption performance are studied in details. The proposed absorber possess the advantages such as, ultra-broadband, high average absorption, easy fabricate and simple structure. The proposed ultra-broadband perfect absorber may find potential application in solar cell, plasmonic detection in infrared range.


Plasmonic resonance, Metamaterial, Ultra-broadband perfect absorption, Solar cell.


F. CHEN, Y. XU, Ultra-broadband plasmonic perfect absorber based on titanium-aluminum oxide strip multilayer structure, Optoelectronics and Advanced Materials - Rapid Communications, 16, 1-2, January-February 2022, pp.41-46 (2022).

Submitted at: Sept. 29, 2020

Accepted at: Feb. 10, 2022