期刊
OPTICS COMMUNICATIONS
卷 334, 期 -, 页码 152-155出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.optcom.2014.08.038
关键词
Graphene; Surface plasmon polaritons (SPPs); Finite-difference time-domain (FDTD); Leapfrog ADI-FDTD; Optically pumped
类别
资金
- NSFC [61171037, 61371043]
- Specialized Research Fund for the Doctoral Program of Higher Education [20100101110065]
- State Key Lab of MOI of Zhejiang University of China
- University of Electronic Science and Technology of China
- Dalhousie University
- Natural Science and Engineering Research Council of Canada (NSERC)
An improved one-step leapfrog alternating-direction-implicit finite-difference time-domain (ADI-FDTD) method is proposed to study surface plasmon polaritons (SPPs) in optically pumped and electrostatic applied curved graphene structures, with their intraband and interband surface conductivities modeled with the vector fitting technique. Such a method can quickly capture the broadband characteristics of SPPs propagating along monolayer, bilayer and trilayer graphene sheets of arbitrary shapes. Numerical stability and accuracy are validated through characterizing field distributions of the SPPs supported in the 180 degrees-curved and spiral graphene sheet waveguides and higher computational efficiency are achieved in comparison with the conventional FDTD method. (C) 2014 Elsevier B.V All rights reserved.
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