Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/30146
Title: Tunable light-matter interaction and the role of hyperbolicity in graphene-hbn system
Authors: Kumar, A
Low, T
Fung, KH 
Avouris, P
Fang, NX
Keywords: Graphene
hBN
Hyperbolic metamaterials
Phonons
Plasmonics
Issue Date: 2015
Publisher: American Chemical Society
Source: Nano letters, 2015, v. 15, no. 5, p. 3172-3180 How to cite?
Journal: Nano letters 
Abstract: Hexagonal boron nitride (hBN) is a natural hyperbolic material, which can also accommodate highly dispersive surface phonon-polariton modes. In this paper, we examine theoretically the mid-infrared optical properties of graphene-hBN heterostructures derived from their coupled plasmon-phonon modes. We find that the graphene plasmon couples differently with the phonons of the two Reststrahlen bands, owing to their different hyperbolicity. This also leads to distinctively different interaction between an external quantum emitter and the plasmon-phonon modes in the two bands, leading to substantial modification of its spectrum. The coupling to graphene plasmons allows for additional gate tunability in the Purcell factor and narrow dips in its emission spectra.
URI: http://hdl.handle.net/10397/30146
ISSN: 1530-6984
EISSN: 1530-6992
DOI: 10.1021/acs.nanolett.5b01191
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