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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Qi, Y., Gan, D., Ma, J. et al. Spectrally selective splitters with metal-dielectric-metal surface plasmon waveguides. Appl. Phys. B 95, 807–812 (2009). https://doi.org/10.1007/s00340-009-3493-0
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DOI: https://doi.org/10.1007/s00340-009-3493-0