Angle-independent plasmonic infrared band-stop reflective filter based on the Ag/SiO_2/Ag T-shaped array | Zendy

Cheng-Wen Cheng | Zendy; Mohammed Nadhim Abbas | Zendy; Z. C. Chang | Zendy; MinHsiung Shih | Zendy; ChihMing Wang | Zendy; M. C. Wu | Zendy; YiaChung Chang | Zendy

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Angle-independent plasmonic infrared band-stop reflective filter based on the Ag/SiO_2/Ag T-shaped array

Author(s) -

Cheng-Wen Cheng,

Mohammed Nadhim Abbas,

Z. C. Chang,

MinHsiung Shih,

ChihMing Wang,

M. C. Wu,

YiaChung Chang

Publication year - 2011

Publication title -

optics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.524

H-Index - 272

eISSN - 1071-2763

pISSN - 0146-9592

DOI - 10.1364/ol.36.001440

Subject(s) - optics , plasmon , rigorous coupled wave analysis , materials science , infrared , surface plasmon polariton , surface plasmon resonance , surface plasmon , fourier transform infrared spectroscopy , spectrometer , total internal reflection , optoelectronics , stopband , wavelength , diffraction grating , band pass filter , physics , nanoparticle , nanotechnology

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.

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