Manipulation of plasmonic resonances in graphene coated dielectric cylinders

Handle URI:
http://hdl.handle.net/10754/621857
Title:
Manipulation of plasmonic resonances in graphene coated dielectric cylinders
Authors:
Ge, Lixin; Han, Dezhuan; Wu, Ying ( 0000-0002-7919-1107 )
Abstract:
Graphene sheets can support surface plasmon as the Dirac electrons oscillate collectively with electromagnetic waves. Compared with the surface plasmon in conventional metal (e.g., Ag and Au), graphene plasmonic owns many remarkable merits especially in Terahertz and far infrared frequencies, such as deep sub-wavelength, low loss, and high tunability. For graphene coated dielectric nano-scatters, localized surface plasmon (LSP)exist and can be excited under specific conditions. The LSPs are associated with the Mie resonance modes, leading to extraordinary large scattering and absorption cross section. In this work, we study systematically the optical scattering properties for graphene coated dielectric cylinders. It is found that the LSP can be manipulated by geometrical parameters and external electric gating. Generally, the resonance frequencies for different resonance modes are not the same. However, under proper design, we show that different resonance modes (e.g., dipole mode, quadruple mode etc.) can be excited at the same frequency. Thus, the scattering and absorption by graphene coated dielectric cylinders can indeed overcome the single channel limit. Our finding may open up new avenues in applications for the graphene-based THz optoelectronic devices.
KAUST Department:
Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
Citation:
Lixin Ge, Dezhuan Han, Ying Wu (2016) Manipulation of plasmonic resonances in graphene coated dielectric cylinders. 2016 Progress in Electromagnetic Research Symposium (PIERS). Available: http://dx.doi.org/10.1109/PIERS.2016.7735174.
Publisher:
Institute of Electrical and Electronics Engineers (IEEE)
Journal:
2016 Progress in Electromagnetic Research Symposium (PIERS)
Issue Date:
16-Nov-2016
DOI:
10.1109/PIERS.2016.7735174
Type:
Conference Paper
Additional Links:
http://ieeexplore.ieee.org/document/7735174/
Appears in Collections:
Conference Papers; Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorGe, Lixinen
dc.contributor.authorHan, Dezhuanen
dc.contributor.authorWu, Yingen
dc.date.accessioned2016-11-22T08:50:25Z-
dc.date.available2016-11-22T08:50:25Z-
dc.date.issued2016-11-16en
dc.identifier.citationLixin Ge, Dezhuan Han, Ying Wu (2016) Manipulation of plasmonic resonances in graphene coated dielectric cylinders. 2016 Progress in Electromagnetic Research Symposium (PIERS). Available: http://dx.doi.org/10.1109/PIERS.2016.7735174.en
dc.identifier.doi10.1109/PIERS.2016.7735174en
dc.identifier.urihttp://hdl.handle.net/10754/621857-
dc.description.abstractGraphene sheets can support surface plasmon as the Dirac electrons oscillate collectively with electromagnetic waves. Compared with the surface plasmon in conventional metal (e.g., Ag and Au), graphene plasmonic owns many remarkable merits especially in Terahertz and far infrared frequencies, such as deep sub-wavelength, low loss, and high tunability. For graphene coated dielectric nano-scatters, localized surface plasmon (LSP)exist and can be excited under specific conditions. The LSPs are associated with the Mie resonance modes, leading to extraordinary large scattering and absorption cross section. In this work, we study systematically the optical scattering properties for graphene coated dielectric cylinders. It is found that the LSP can be manipulated by geometrical parameters and external electric gating. Generally, the resonance frequencies for different resonance modes are not the same. However, under proper design, we show that different resonance modes (e.g., dipole mode, quadruple mode etc.) can be excited at the same frequency. Thus, the scattering and absorption by graphene coated dielectric cylinders can indeed overcome the single channel limit. Our finding may open up new avenues in applications for the graphene-based THz optoelectronic devices.en
dc.publisherInstitute of Electrical and Electronics Engineers (IEEE)en
dc.relation.urlhttp://ieeexplore.ieee.org/document/7735174/en
dc.titleManipulation of plasmonic resonances in graphene coated dielectric cylindersen
dc.typeConference Paperen
dc.contributor.departmentComputer, Electrical and Mathematical Sciences and Engineering (CEMSE) Divisionen
dc.identifier.journal2016 Progress in Electromagnetic Research Symposium (PIERS)en
dc.eprint.versionPublisher's Version/PDFen
dc.contributor.institutionDepartment of Applied Physics, Chongqing University, 401331, Chinaen
kaust.authorWu, Yingen
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