Label-Free Biosensing With a Slot-Waveguide-Based Ring Resonator in Silicon on Insulator
TLDR
In this article, a slot waveguide-based ring resonator with a footprint of only 13 mum times 10 mum, fabricated with optical lithography, was presented for selective label-free sensing of proteins.Abstract:
We present a slot-waveguide-based ring resonator in silicon on insulator (SOI) with a footprint of only 13 mum times 10 mum, fabricated with optical lithography. Experiments show that it has 298 nm/RIU sensitivity and a detection limit of 4.2middot10-5 RIU for changes in the refractive index of the top cladding. We prove for the first time that surface chemistry for selective label-free sensing of proteins can be applied inside a 100 nm-wide slot region and demonstrate that the application of a slot waveguide instead of a normal waveguide increases the sensitivity of an SOI ring resonator with a factor 3.5 for the detection of proteins.read more
Citations
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Integrated optical devices for lab-on-a-chip biosensing applications
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Label-free detection with high-Q microcavities: a review of biosensing mechanisms for integrated devices.
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High-Q optical sensors for chemical and biological analysis.
TL;DR: High-quality factor (high-Q) optical sensors based on multi-pass photonic microstructures have recently emerged as an extremely promising, and perhaps the most sensitive, class of label-free sensors.
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Experimental characterization of a silicon photonic biosensor consisting of two cascaded ring resonators based on the Vernier-effect and introduction of a curve fitting method for an improved detection limit
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Silicon Photonic Biosensors Using Label-Free Detection.
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Christian Koos,Christian Koos,P. Vorreau,Thomas Vallaitis,Pieter Dumon,Wim Bogaerts,Roel Baets,Bweh Esembeson,Ivan Biaggio,Tsuyoshi Michinobu,François Diederich,Wolfgang Freude,Juerg Leuthold +12 more
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