Open AccessDouble-channel narrowband filter based on Goos-Hänchen shift
Author(s) -
Jing Hao,
Honggen Li,
Zhang Cao,
Fan Chen
Publication year - 2011
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.60.074223
Subject(s) - narrowband , channel (broadcasting) , filter (signal processing) , acoustics , computer science , materials science , telecommunications , physics , computer vision
We propose a double-channel narrowband filter based on anomalous large Goos-Hänchen shift reflected from a symmetrical metal-cladding optical waveguide. We demonstrate that two filtering peaks are 859.604nm and 859.688nm respectively. The 3 dB bandwidth is found to be 0.036 nm with an extinction ratio of 15.3dB at a light wavelength of 859.60nm. The filtering peaks can be tuned by choosing an appropriate incident angle and a aperture position.