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Design of graphene‐based terahertz nanoantenna arrays
Author(s) -
Donelli Massimo
Publication year - 2015
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.28925
Subject(s) - graphene , terahertz radiation , microwave , plasmon , nanotechnology , materials science , function (biology) , optoelectronics , computer science , electronic engineering , engineering , telecommunications , evolutionary biology , biology
This article presents a method for the design of graphene nanoantenna arrays at terahertz. A customized hybrid genetic algorithm (HGA) is used to maximize the plasmonic field enhancements and to minimize the sidelobe levels by acting on the array thinning, the spacing between elements, the size, and the graphene chemical potential. In particular, the graphene chemical potential is controlled by an applied electrostatic bias field. The problem is recasted as an optimization one by defining a suitable cost function, which is then, minimized using the HGA. Numerical results concerning graphene nanoarrays are reported to assess the design methodology. The obtained results are promising, and they demonstrate the potentialities and the advantages of graphene nanoarrays. © 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 57:653–657, 2015