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Plasmonic Infrared Bandstop Reflective Filter

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2 Author(s)
Chih-Ming Wang ; Dept. of Opto-Electron. Eng., Nat. Dong Hwa Univ., Shoufeng, Taiwan ; Din Ping Tsai

Various types of free-space plasmonic bandstop filters are reviewed. The plasmonic multilayer structure shows multiple localized surface plasmon (LSP) resonance modes with extraordinary high angle tolerance. Through modifying the plasmonic multilayer structure to a plasmonic T-shaped array, the multiple LSP modes can be suppressed. The filtering properties present a single resonance dip with a low sideband. Through modifying the plasmonic T-shaped array to be an asymmetric one, dual resonance modes can be easily designed. Finally, a nanoporous Au film is proposed to act as a bandstop filter. The fabrication processes are simple and the resonance dip can be manipulated by altering the annealing temperature.

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Selected Topics in Quantum Electronics, IEEE Journal of  (Volume:19 ,  Issue: 3 )