A terahertz polarization insensitive dual band metamaterial absorber

Ma, Y., Chen, Q., Grant, J. , Saha, S.C., Khalid, A. and Cumming, D.R.S. (2011) A terahertz polarization insensitive dual band metamaterial absorber. Optics Letters, 36(6), pp. 945-947. (doi: 10.1364/OL.36.000945)

Abstract

Metamaterial absorbers have attracted considerable attention for applications in the terahertz range. In this Letter, we report the design, fabrication, and characterization of a terahertz dual band metamaterial absorber that shows two distinct absorption peaks with high absorption. By manipulating the periodic patterned structures as well as the dielectric layer thickness of the metal–dielectric–metal structure, significantly high absorption can be obtained at specific resonance frequencies. Finite-difference time-domain modeling is used to design the structure of the absorber. The fabricated devices have been characterized using a Fourier transform IR spectrometer. The experimental results show two distinct absorption peaks at 2.7 and 5.2 THz, which are in good agreement with the simulation. The absorption magnitudes at 2.7 and 5.2 THz are 0.68 and 0.74, respectively.

• Item Type: Articles
• Additional Information: This paper was published in Optics Letters and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://dx.doi.org/10.1364/OL.36.000945. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Saha, Dr Shimul and Ma, Mr Yong and Cumming, Professor David and Chen, Dr Qin and Khalid, Dr Ata-Ul-Habib and Grant, Dr James
• Authors: Ma, Y., Chen, Q., Grant, J., Saha, S.C., Khalid, A., and Cumming, D.R.S.
• Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering
• College/School: College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
• Journal Name: Optics Letters
• Publisher: Optical Society of America
• ISSN: 0146-9592
• ISSN (Online): 1539-4794
• Copyright Holders: Copyright © 2011 Optical Society of America
• First Published: First published in Optics Letters 36(6):945-947
• Publisher Policy: Reproduced in accordance with the copyright policy of the publisher