Plasmonic infrared bandstop reflective filter

Chih Ming Wang, Din Ping Tsai

Research output: Contribution to journalArticlepeer-review

6 Scopus citations


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.

Original languageEnglish
Article number6508917
JournalIEEE Journal on Selected Topics in Quantum Electronics
Issue number3
StatePublished - 2013


  • Optical filter
  • plasmonics
  • porous Au film


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