Waveguide-coupled surface phonon resonance sensors with super-resolution in the mid-infrared region
A waveguide-coupled surface phonon resonance (SPhR) sensor with super-resolution based on Fano resonance (FR) by using a multilayer system within the Kretschmann configuration in the mid-infrared wavelength region is proposed. Due to the coherent interference of the waveguide and the surface phonon...
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Published in | Optics letters Vol. 41; no. 7; p. 1582 |
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Main Authors | , , , , |
Format | Journal Article |
Language | English |
Published |
United States
01.04.2016
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Online Access | Get more information |
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Summary: | A waveguide-coupled surface phonon resonance (SPhR) sensor with super-resolution based on Fano resonance (FR) by using a multilayer system within the Kretschmann configuration in the mid-infrared wavelength region is proposed. Due to the coherent interference of the waveguide and the surface phonon polariton modes, the calculated reflectivity spectrum possesses sharp asymmetric FR dips. An ultra-small linewidth is formed because of the Fano coupling, and the physical features contribute to a highly efficient nano-sensor for refractive index sensing. The bulk and surface sensitivity by intensities are greatly enhanced relative to those of conventional SPhR sensors. |
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ISSN: | 1539-4794 |
DOI: | 10.1364/OL.41.001582 |