Manipulation of plasmonic resonances in graphene coated dielectric cylinders
Type
Conference PaperAuthors
Ge, LixinHan, Dezhuan
Wu, Ying

KAUST Department
Applied Mathematics and Computational Science ProgramComputer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
Date
2016-11-16Online Publication Date
2016-11-16Print Publication Date
2016-08Permanent link to this record
http://hdl.handle.net/10754/621857
Metadata
Show full item recordAbstract
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.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.Additional Links
http://ieeexplore.ieee.org/document/7735174/ae974a485f413a2113503eed53cd6c53
10.1109/PIERS.2016.7735174