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A New Mechanism for THz Detection Based on the Tunneling Effect in Bi-Layer Graphene Nanoribbons
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A New Mechanism for THz Detection Based on the Tunneling Effect in Bi-Layer Graphene Nanoribbons
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Journal Article
A New Mechanism for THz Detection Based on the Tunneling Effect in Bi-Layer Graphene Nanoribbons
2015
Overview
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.
Publisher
MDPI AG
Subject
