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Proceedings Paper

Terahertz modulation using a bandpass filter combined with a graphene supercapacitor
Author(s): Taylan Takan; Mehmet A. Nebioglu; Nurbek Kakenov; Osman Balci; Coskun Kocabas; Hakan Altan
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Paper Abstract

Graphene is proving to be an efficient medium for the control of mm-wave/THz radiation. Its electrical and dielectric properties allows it to be incorporated into various existing device architectures. One such application is in the modulation of the amplitude of the propagating THz radiation. Due to its electrical properties this interaction is typically broadband in nature. To make this frequency selective we propose the use of metamaterials or frequency selective surfaces. Generally, these structures perform the frequency filtering by modifying the propagation of the input wave with respect to changing structural parameters of the device itself. By fabricating a frequency selective surface based on a periodic circular hole array on an aluminum sheet we show that the transmission of a narrow band of THz radiation can be modulated when the sheet is combined with a highly efficient graphene based supercapacitor device. The modulation depth of the device was 15% in the frequency region of interest. The simple structure of the device coupled with the obtained performance shows that graphene based devices have great potential for the development of THz technologies.

Paper Details

Date Published: 21 October 2015
PDF: 6 pages
Proc. SPIE 9651, Millimetre Wave and Terahertz Sensors and Technology VIII, 96510F (21 October 2015); doi: 10.1117/12.2195140
Show Author Affiliations
Taylan Takan, Middle East Technical Univ. (Turkey)
Mehmet A. Nebioglu, Middle East Technical Univ. (Turkey)
Nurbek Kakenov, Bilkent Univ. (Turkey)
Osman Balci, Bilkent Univ. (Turkey)
Coskun Kocabas, Bilkent Univ. (Turkey)
Hakan Altan, Middle East Technical Univ. (Turkey)

Published in SPIE Proceedings Vol. 9651:
Millimetre Wave and Terahertz Sensors and Technology VIII
Neil A. Salmon; Eddie L. Jacobs, Editor(s)

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