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Terahertz Detection and Imaging Using Graphene Ballistic Rectifiers

Gregory AutonLaboratoire Charles CoulombDmytro B. ButUniversité de MontpellierJiawei ZhangL2C - Laboratoire Charles Coulomb (1 place Eugène Bataillon Université Montpellier 34095 Montpellier Cedex 5 - France)E.W. HillL2C - Laboratoire Charles Coulomb (1 place Eugène Bataillon Université Montpellier 34095 Montpellier Cedex 5 - France)Dominique CoquillatLaboratoire Charles Coulomb (L2C), Université de Montpellier, CNRS UMR 5221, 34090 Montpellier, FranceC. ConséjoLaboratoire Charles Coulomb (L2C), Université de Montpellier, CNRS UMR 5221, 34090 Montpellier, FranceP. NouvelUniversité de MontpellierW. KnapLaboratoire Charles Coulomb (L2C), Université de Montpellier, CNRS UMR 5221, 34090 Montpellier, FranceL. VaraniUniversité de MontpellierF. TeppeLaboratoire Charles Coulomb (L2C), Université de Montpellier, CNRS UMR 5221, 34090 Montpellier, FranceJ. TorresInstitut d’Electronique et des Systèmes (IES), Université de Montpellier, CNRS UMR 5114, 34090 Montpellier, FranceAimin SongState Key Laboratory of Crystal Materials

2017en

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ABI

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at room temperature with no indications of a cutoff frequency up to 0.45 THz. The device also demonstrates a linear response for more than 3 orders of magnitude of input power due to its zero threshold voltage, quadratic current-voltage characteristics and high saturation current. Finally, the device is used to take an image of an optically opaque object at 0.685 THz, demonstrating potential in both medical and security imaging applications.

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DOI: 10.1021/acs.nanolett.7b03625

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