Abstract
A T-shaped splitter of the surface plasmon waveguide with a stub based on metal-insulatormetal structure was proposed.The relationship between transmission and structure parameters was investigated by Finite-difference time-domain method.The simulation results show that the periodical changes of surface plasmons power can be achieved by changing the width and length of stub structure in T-shaped waveguide.Also,the periodical changes of splitting ratio for changes of surface plasmons can be obtained by changing the stub structure position of the output port in the metal-insulator-me waveguide structure.When the splitting ratio get maximum(or minimum),T-shaped splitter can achieve the unidirectional propagation of changes of surface plasmons.Besides,the periodical changes of splitting ratio was explained based on the changes of surface plasmons interference theory.
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