Angle-independent plasmonic infrared band-stop reflective filter based on the Ag/SiO2/Ag T-shaped array

Cheng Wen Cheng, Mohammed Nadhim Abbas, Zi Chang Chang, M. H. Shih, Chih Ming Wang, M. C. Wu, Yia Chung Chang

Research output: Contribution to journalArticlepeer-review

25 Scopus citations

Abstract

A plasmonic infrared (IR) filter assisted by localized surface plasmon polaritons (LSPPs) in a Ag/SiO2/Ag T-shaped array was theoretically and experimentally investigated. By using a Fourier transform infrared (FTIR) spectrometer, an angle-independent LSPP resonant mode caused by a Fabry-Pérot resonance in the structure was observed in agreement with the prediction from the rigorous coupled-wave analysis (RCWA) simulation. The resonant wavelength of the mode can also be controlled by modifying the geometry of the T-shaped structure. Such LSPP property can be used as an IR reflection-type band-stop filter with a single spectral bandwidth and an ultrahigh immunity to incident angles.

Original languageEnglish
Pages (from-to)1440-1442
Number of pages3
JournalOptics Letters
Volume36
Issue number8
DOIs
StatePublished - 15 Apr 2011

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