Share Email Print
cover

Proceedings Paper • new

Tunable polarization-independent broadband absorber in the terahertz regime
Author(s): Xingzhe Shi; Yuanfu Lu; Changshui Chen; Songhao Liu; Guangyuan Li
Format Member Price Non-Member Price
PDF $17.00 $21.00

Paper Abstract

Here we report a tunable polarization-independent broadband absorber in the terahertz regime. The proposed structure consists of periodic all-dielectric array on a gold substrate, sandwiched by a monolayer graphene and an epsilon-near-zero layer. Simulation results show that the absorption that is independent from the incident polarization remains above 90% over a broadband spectral range from 1.6 THz to 4.1 THz, corresponding to a bandwidth of 2.5 THz and a relative bandwidth of 87.7%. By varying the graphenes Fermi energy from 0.2 eV to 0.5 eV, the absorption bandwidth can be turned from 1.5 THz to 2.5 THz. We expect this polarization- independent absorber with dynamically tunable bandwidth can be used a filters in applications such as terahertz detectors.

Paper Details

Date Published: 18 November 2019
PDF: 6 pages
Proc. SPIE 11196, Infrared, Millimeter-Wave, and Terahertz Technologies VI, 111960G (18 November 2019); doi: 10.1117/12.2537677
Show Author Affiliations
Xingzhe Shi, Shenzhen Institutes of Advanced Technology (China)
South China Normal Univ. (China)
Yuanfu Lu, Shenzhen Institutes of Advanced Technology (China)
Changshui Chen, South China Normal Univ. (China)
Songhao Liu, South China Normal Univ. (China)
Guangyuan Li, Shenzhen Institutes of Advanced Technology (China)


Published in SPIE Proceedings Vol. 11196:
Infrared, Millimeter-Wave, and Terahertz Technologies VI
Cunlin Zhang; Xi-Cheng Zhang; Masahiko Tani, Editor(s)

© SPIE. Terms of Use
Back to Top