Tunable light-matter interaction and the role of hyperbolicity in graphene-hbn system

Anshuman Kumar; Tony Low; Kin Hung Fung; Phaedon Avouris; Nicholas X. Fang

doi:10.1021/acs.nanolett.5b01191

Tunable light-matter interaction and the role of hyperbolicity in graphene-hbn system

Anshuman Kumar, Tony Low, Kin Hung Fung, Phaedon Avouris, Nicholas X. Fang

Research output: Journal article publication › Journal article › Academic research › peer-review

274 Citations (Scopus)

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.

Original language	English
Pages (from-to)	3172-3180
Number of pages	9
Journal	Nano Letters
Volume	15
Issue number	5
DOIs	https://doi.org/10.1021/acs.nanolett.5b01191
Publication status	Published - 13 May 2015

Keywords

graphene
hBN
hyperbolic metamaterials
phonons
Plasmonics

ASJC Scopus subject areas

Bioengineering
General Chemistry
General Materials Science
Condensed Matter Physics
Mechanical Engineering

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10.1021/acs.nanolett.5b01191

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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.",

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AU - Low, Tony

AU - Fung, Kin Hung

AU - Avouris, Phaedon

AU - Fang, Nicholas X.

PY - 2015/5/13

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AB - 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.

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Tunable light-matter interaction and the role of hyperbolicity in graphene-hbn system

Abstract

Keywords

ASJC Scopus subject areas

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