Band structure and dispersion engineering of strongly coupled plasmon-phonon-polaritons in graphene-integrated structures
Date
2016-01-19
Journal Title
Journal ISSN
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Publisher
The Optical Society
Abstract
We theoretically investigate the polaritonic band structure
and dispersion properties of graphene using transfer matrix methods,
with strongly coupled graphene plasmons (GPs) and molecular infrared
vibrations as a representative example. Two common geometrical con-
figurations are considered: graphene coupled subwavelength dielectric
grating (GSWDG) and graphene nanoribbons (GNR). By exploiting the
dispersion and the band structure, we show the possibility of tailoring
desired polaritonic behavior in each of the two configurations. We compare
the strength of coupling occurring in both structures and find that the
interaction is stronger in GNR than that of GSWDG structure as a result of
the stronger field confinement of the edge modes. The band structure and
dispersion analysis not only sheds light on the physics of the hybridized
polariton formation but also offers insight into tailoring the optical response
of graphene light-matter interactions for numerous applications, such as
biomolecular sensing and detection.
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Citation
Feng Liu, Tianrong Zhan, Alexander Y. Zhu, Fei Yi, and Wangzhou Shi, "Band structure and dispersion engineering of strongly coupled plasmon-phonon-polaritons in graphene-integrated structures," Opt. Express 24, 1480-1494 (2016)