Broadband Terahertz Metamaterial Absorber Based on Asymmetric Resonators With Perfect Absorption

Author

Yongzheng Wen ; Wei Ma ; Bailey, Joe ; Matmon, Guy ; Xiaomei Yu

Author_Institution

Nat. Key Lab. of Sci. & Technol. on Micro/Nano Fabrication, Peking Univ., Beijing, China

Volume

5

Issue

3

fYear

2015

fDate

May-15

Firstpage

406

Lastpage

411

Abstract

In this paper, a broadband terahertz (THz) metamaterial absorber using asymmetric split ring resonator (ASR) was designed, fabricated, and characterized. By breaking the symmetry of a split ring resonator, two asymmetric resonances are excited from a dipole resonance, which enhance both the absorption and Q-factor. With the integration of four different ASRs into one unit cell, a broadband absorber experimentally obtained a 0.82-THz bandwidth with absorptivity of more than 0.9, which is 3.4 times as wide as the 0.24-THz bandwidth of the symmetric dipole peak. The proposed broadband absorber has great application potentials in the THz spectroscopy, imaging, and sensing.

Keywords

Q-factor; resonators; terahertz metamaterials; Q-factor; asymmetric resonances; asymmetric split ring resonator; broadband terahertz metamaterial absorber; dipole resonance; frequency 0.24 THz; frequency 0.82 THz; perfect absorption; symmetric dipole peak bandwidth; terahertz imaging; terahertz sensing; terahertz spectroscopy; Absorption; Bandwidth; Broadband communication; Gold; Impedance; Metamaterials; Resonant frequency; Asymmetry; broadband; metamaterials; perfect absorption; terahertz;

fLanguage

English

Journal_Title

Terahertz Science and Technology, IEEE Transactions on

Publisher

ieee

ISSN

2156-342X

Type

jour

DOI

10.1109/TTHZ.2015.2401392

Filename

7048059