Electrical plasmon injection in double-layer graphene heterostructures. (arXiv:1811.00460v1 [cond-mat.mes-hall])

//Electrical plasmon injection in double-layer graphene heterostructures. (arXiv:1811.00460v1 [cond-mat.mes-hall])

It is by now well established that high-quality graphene enables a gate-tunable low-loss plasmonic platform for the efficient confinement, enhancement, and manipulation of optical fields spanning a broad range of frequencies, from the mid infrared to the Terahertz domain. While all-electrical detection of graphene plasmons has been demonstrated, electrical plasmon injection (EPI), which is crucial to operate nanoplasmonic devices without the encumbrance of a far-field optical apparatus, remains elusive. In this work, we present a theory of EPI in double-layer graphene, where a vertical tunnel current excites acoustic and optical plasmon modes. We first calculate the power delivered by the applied inter-layer voltage bias into these collective modes. We then show that this system works also as a spectrally-resolved molecular sensor.

Published : "arXiv Mesoscale and Nanoscale Physics".

2018-11-02T04:30:20+00:00November 2nd, 2018|Categories: Publications|Tags: , |
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