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Crystals 2017, 7(2), 49; doi:10.3390/cryst7020049

Graphene-Hexagonal Boron Nitride Heterostructure as a Tunable Phonon–Plasmon Coupling System

Key Laboratory for Wide Band Gap Semiconductor Materials and Devices of Education, School of Microelectronics, Xidian University, Xi’an 710071, China
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Academic Editors: Cristina E. Giusca and Spyros Yannopoulos
Received: 31 December 2016 / Revised: 30 January 2017 / Accepted: 4 February 2017 / Published: 10 February 2017
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Abstract

The layered van der Waals (vdW) heterostructure, assembled from monolayer graphene, hexagonal boron nitride (h-BN) and other atomic crystals in various combinations, is emerging as a new paradigm with which to attain desired electronic and optical properties. In this paper, we study theoretically the mid-infrared optical properties of the vdW heterostructure based on the graphene–h-BN system. The light–matter interaction of this heterostructure system is described by the hyperbolic phonon–plasmon polaritons which originate from the coupling modes of surface plasmon polaritons (SPPs) in graphene with hyperbolic phonon polaritons (HPPs) in h-BN. By numerical simulation, we find that the coupling modes are governed by the Fermi level of monolayer graphene, the thickness of the h-BN slab and the mode excitation sequence of SPPs and HPPs. Moreover, the response of the coupling modes of the graphene–h-BN heterostructure on a noble metal layer is also proposed in this paper. View Full-Text
Keywords: Van der Waals heterostructure; two-dimensional materials; graphene; h-BN; hyperbolic phonon–plasmon polaritons Van der Waals heterostructure; two-dimensional materials; graphene; h-BN; hyperbolic phonon–plasmon polaritons
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Qu, S.; Liu, H.; Dong, L.; Wu, L.; Ma, C.; Wang, S. Graphene-Hexagonal Boron Nitride Heterostructure as a Tunable Phonon–Plasmon Coupling System. Crystals 2017, 7, 49.

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