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Appl. Sci. 2015, 5(4), 1102-1116; doi:10.3390/app5041102

A New Mechanism for THz Detection Based on the Tunneling Effect in Bi-Layer Graphene Nanoribbons

1
Department of Electrical and Information Engineering, University of Cassino and Southern Lazio, via G. Di Biasio 43, Cassino 03043, Italy
2
National Institute for Nuclear Physics, INFN, via E. Fermi 10, Frascati 00044, Italy
Academic Editor: Philippe Lambin
Received: 14 October 2015 / Revised: 27 October 2015 / Accepted: 3 November 2015 / Published: 12 November 2015
(This article belongs to the Section Nanotechnology and Applied Nanosciences)
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Abstract

A new possible mechanism of signal detection in the THz range is investigated, based on the excitation of resonances due to the tunneling effect between two graphene nanoribbons. A simple detector is proposed, where two graphene nanoribbons are used to contact two copper electrodes. The terminal voltages are shown to exhibit strong resonances when the frequency of an external impinging field is tuned to the characteristic tunneling frequency of the graphene layer pair. An electrodynamic model for the electron transport along the graphene nanoribbons is extended here to include the tunneling effect, and a coupled transmission line model is finally derived. This model is able to predict not only the tunneling resonance, but also the well-known plasmon resonances, related to the propagation of slow surface waves. View Full-Text
Keywords: graphene; graphene nanoribbons; terahertz electronics; tunneling effect graphene; graphene nanoribbons; terahertz electronics; tunneling effect
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Maffucci, A. A New Mechanism for THz Detection Based on the Tunneling Effect in Bi-Layer Graphene Nanoribbons. Appl. Sci. 2015, 5, 1102-1116.

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