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All-Optical Plasmonic Switches Based on Coupled Nano-disk Cavity Structures Containing Nonlinear Material



All-optical plasmonic switches based on a novel coupled nano-disk cavity configuration containing nonlinear material are proposed and numerically investigated. The finite difference time domain simulation results reveal that the single-disk plasmonic structure can operate as an “on–off” switch with the presence/absence of pumping light. We also demonstrate that the proposed T-shaped plasmonic structure with two disk cavities can switch signal light from one port to another under an optical pumping light, functioning as a bidirectional switch. The proposed nano-disk cavity plasmonic switches have many advantages such as compact size, requirement of low pumping light intensity, and ultra-fast switching time at a femto-second scale, which are promising for future integrated plasmonic devices for applications such as communications, signal processing, and sensing.


All-optical switch Surface plasmon Waveguide Photonic integrated circuits 

Copyright information

© Springer Science+Business Media, LLC 2011

Authors and Affiliations

  1. 1.Division of Microelectronics, School of Electrical and Electronic EngineeringNanyang Technological UniversityNanyangSingapore
  2. 2.Division of Physics and Applied Physics, School of Physical and Mathematical SciencesNanyang Technological UniversityNanyangSingapore
  3. 3.Key laboratory of Photonic Information Technology of Guangdong Higher Education InstitutesSouth China Normal UniversityGuangzhouChina

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