NDLI: Label-Free Biosensing With a Slot-Waveguide-Based Ring Resonator in Silicon on Insulator

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Label-Free Biosensing With a Slot-Waveguide-Based Ring Resonator in Silicon on Insulator

Content Provider	IEEE Xplore Digital Library
Author	Claes, T. Molera, J.G. De Vos, K. Schacht, E. Baets, R. Bienstman, P.
Copyright Year	2009
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.
Starting Page	197
Ending Page	204
Page Count	8
File Size	1186797
File Format	PDF
ISSN	19430655
Volume Number	1
Issue Number	3
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-09-01
Publisher Place	U.S.A.
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Biosensors Optical ring resonators Silicon on insulator technology Proteins Optical waveguides Biomedical optical imaging Optical refraction Optical sensors Optical variables control Lithography slot waveguide Biosensor ring resonator silicon on insulator
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics Electrical and Electronic Engineering

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