Spectrally selective splitters with metal-dielectric-metal surface plasmon waveguides |
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Authors: | Y Qi D Gan J Ma J Cui C Wang and X Luo |
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Institution: | (1) State Key Laboratory of Optical Technologies for Microfabrication, Institute of Optics and Electronics, Chinese Academy of Sciences, P.O. Box 350, Chengdu, 610209, China;(2) College of Information Engineering, Shenzhen University, Shenzhen, 518060, China |
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Abstract: | Spectrally selective splitters with metal-dielectric-metal (MDM) subwavelength waveguides are proposed in this paper. The
method is based on the Bragg grating structure with periodically modulated MDM waveguide width, which delivers a stop band
effect for the surface plasmon propagating in the waveguide. By adding appropriate Bragg grating structure in one or more
arms of the waveguide splitters, light in a certain frequency range can be readily guided into the desired directions, as
demonstrated numerically by the finite-difference time-domain method. Dependence and optimization of the geometrical parameters
are also considered in this paper. |
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Keywords: | PACS" target="_blank">PACS 42 82 |
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