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

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 reson...

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Bibliographic Details
Published in:Optics letters 2011-04, Vol.36 (8), p.1440-1442
Main Authors: CHENG, Cheng-Wen, MOHAMMED NADHIM ABBAS, CHANG, Zi-Chang, SHIH, M. H, WANG, Chih-Ming, WU, M. C, CHANG, Yia-Chung
Format: Article
Language:English
Subjects:
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Optics
Physics
Online Access:Get full text
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Summary: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.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.36.001440