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Sensors 2012, 12(9), 12082-12097; doi:10.3390/s120912082

Sensors Based on Plasmonic-Photonic Coupling in Metallic Photonic Crystals

1
Institute of Information Photonics Technology and College of Applied Sciences, Beijing University of Technology, Beijing 100124, China
2
Department of Physics, Capital Normal University, Beijing 100048, China
*
Author to whom correspondence should be addressed.
Received: 18 July 2012 / Revised: 16 August 2012 / Accepted: 17 August 2012 / Published: 3 September 2012
(This article belongs to the Special Issue Ultra-Small Sensor Systems and Components)
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Abstract

An optical sensor based on the coupling between the plasmonic and photonic resonance modes in metallic photonic crystals is investigated. Large-area metallic photonic crystals consisting of periodically arranged gold nanostructures with dimensions down to sub-100 nm are fabricated using solution-processible gold nanoparticles in combination with interference lithography or interference ablation, which introduces a variety of fabrication techniques for the construction of this kind of sensor device. Sensitivity of the plasmonic response of the gold nanostructures to the changes in the environmental refractive index is enhanced through the coupling between the narrow-band photonic resonance mode and the relatively broad-band plasmon resonance, which is recognized as a Fano-like effect and is utilized to explore sensors. Theoretical modeling shows the characterization and the optimization of the sensitivity of this kind of sensor device. Theoretical and experimental results are demonstrated for the approaches to improve the sensitivity of the sensor device. View Full-Text
Keywords: plasmonic-photonic coupling; metallic photonic crystals; sensitivity enhancement; angle-resolved tuning; waveguide thinning plasmonic-photonic coupling; metallic photonic crystals; sensitivity enhancement; angle-resolved tuning; waveguide thinning
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Zhang, X.; Feng, S.; Zhang, J.; Zhai, T.; Liu, H.; Pang, Z. Sensors Based on Plasmonic-Photonic Coupling in Metallic Photonic Crystals. Sensors 2012, 12, 12082-12097.

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