Numerical investigation of an all-optical switch in a graded nonlinear plasmonic grating

We have proposed and numerically investigated an all-optical switch based on a metal-insulator-metal waveguide with graded nonlinear plasmonic gratings. The influences of grating depth and refractive index of a Kerr nonlinear medium on the transmission of the switch are exactly analyzed by utilizing...

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Bibliographic Details
Published in:Nanotechnology 2012-11, Vol.23 (44), p.444009-444009
Main Authors: Wang, Guoxi, Lu, Hua, Liu, Xueming, Gong, Yongkang
Format: Article
Language:English
Subjects:
Computer simulation
Electric fields
Mathematical analysis
Mathematical models
Nonlinearity
Plasmonics
Switches
Tuning
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Summary:We have proposed and numerically investigated an all-optical switch based on a metal-insulator-metal waveguide with graded nonlinear plasmonic gratings. The influences of grating depth and refractive index of a Kerr nonlinear medium on the transmission of the switch are exactly analyzed by utilizing transmission line theory. The finite-difference time-domain simulation results show that the highly compact structure possesses excellent switch function by tuning the incident electric field intensity. In addition, the simulation results show that this all-optical switch has an ultrawide operating frequency regime and femtosecond-scale response time (∼130 fs). Such a switch can find potential applications for all-optical signal processing and optical communication.
ISSN:0957-4484
1361-6528
DOI:10.1088/0957-4484/23/44/444009