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Title: Manipulating propagating graphene plasmons at near field by shaped graphene nano-vacancies
Authors: Du, Luping
Tang, Dingyuan
Keywords: DRNTU::Engineering::Electrical and electronic engineering::Optics, optoelectronics, photonics
Issue Date: 2014
Source: Du, L., & Tang, D. (2014). Manipulating propagating graphene plasmons at near field by shaped graphene nano-vacancies. Journal of the Optical Society of America A, 31(4), 691-695.
Series/Report no.: Journal of the optical society of America A
Abstract: Surface plasmons in graphene have many promising properties, such as high confinement, low losses, and gate-tunability. However, it is also the high confinement that makes them difficult to excite due to their large momentum mismatch with free-space mid-infrared light. We propose to use shaped graphene nano-vacancies to compensate for the momentum mismatch, revealing its high flexibility in graphene plasmon (GP) excitation and manipulation. We first examine the electromagnetic standing waves generated with a pair of straight vacancies, in order to verify the excitation of GPs and to illustrate their tunability with gate voltage. Plasmonic lenses are then designed to achieve the super-focusing of mid-infrared light and to generate plasmonic vortices in graphene. A∼0.0125λ0 hotspot is generated, far below the optical diffraction limit, hence revealing the capability of light control at deep-subwavelength scale.
ISSN: 1084-7529
DOI: 10.1364/JOSAA.31.000691
Schools: School of Electrical and Electronic Engineering 
Rights: © 2014 Optical Society of America. This paper was published in Journal of the Optical Society of America A and is made available as an electronic reprint (preprint) with permission of Optical Society of America. The paper can be found at the following official DOI:  One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:EEE Journal Articles

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