Premium
Mie‐Resonance‐Based Metamaterials with Perfect Absorption in the Terahertz Frequency Range
Author(s) -
Zhang Jingtao,
Pan Kaichao,
Qiu Jun
Publication year - 2021
Publication title -
physica status solidi (rrl) – rapid research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.786
H-Index - 68
eISSN - 1862-6270
pISSN - 1862-6254
DOI - 10.1002/pssr.202100031
Subject(s) - metamaterial , terahertz radiation , metamaterial absorber , mie scattering , absorption (acoustics) , resonance (particle physics) , materials science , optics , bandwidth (computing) , microsphere , optoelectronics , split ring resonator , terahertz spectroscopy and technology , spheres , physics , tunable metamaterials , scattering , telecommunications , computer science , light scattering , atomic physics , chemical engineering , engineering , astronomy
Metamaterials have opened up an approach for high‐performance terahertz wave absorption. Herein, Mie‐resonance‐based metamaterials are fabricated from Al 2 O 3 microspheres with different sizes. A facile method is designed to prepare the arrays of spheres efficiently and precisely. The Al 2 O 3 ‐microsphere‐array metamaterial constructed with 77 μm spheres achieves perfect absorption. The maximum absorption arrives at 99.98% and the bandwidth for absorption higher than 99% is 0.11 THz (from 1.57 to 1.68 THz). Mie resonance is verified to be the reason for the strong absorption with its size‐dependent property demonstrated experimentally and theoretically. An efficient and economical route is offered to construct metamaterial perfect absorbers in the terahertz band.