Hybrid Surface-Phonon-Plasmon Polariton Modes in Graphene/Monolayer h-BN Heterostructures

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Infrared transmission measurements reveal the hybridization of graphene plasmons and the phonons in a monolayer hexagonal boron nitride (h-BN) sheet. Frequency-wavevector dispersion relations of the electromagnetically coupled graphene plasmon/h-BN phonon modes are derived from measurement of nanoresonators with widths varying from 30 to 300 nm. It is shown that the graphene plasmon mode is split into two distinct optical modes that display an anticrossing behavior near the energy of the h-BN optical phonon at 1370 cm(-1). We explain this behavior as a classical electromagnetic strong-coupling with the highly confined near fields of the graphene plasmons allowing for hybridization with the phonons of the atomically thin h-BN layer to create two clearly separated new surface-phonon-plasmon-polariton (SPPP) modes
Publisher
AMER CHEMICAL SOC
Issue Date
2014-07
Language
English
Article Type
Article
Citation

NANO LETTERS, v.14, no.7, pp.3876 - 3880

ISSN
1530-6984
DOI
10.1021/nl501096s
URI
http://hdl.handle.net/10203/208975
Appears in Collection
EE-Journal Papers(저널논문)
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