Photonic crystal microring resonator for label-free biosensing

A label-free optical biosensor based on a one-dimensional photonic crystal microring resonator with enhanced light-matter interaction is demonstrated. More than a 2-fold improvement in volumetric and surface sensing sensitivity is achieved compared to conventional microring sensors. The experimental...

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Bibliographic Details
Published in:Optics express 2017-03, Vol.25 (6), p.7046-7054
Main Authors: Lo, Stanley M, Hu, Shuren, Gaur, Girija, Kostoulas, Yiorgos, Weiss, Sharon M, Fauchet, Philippe M
Format: Article
Language:English
Subjects:
Biosensing Techniques - methods
Light
Optics and Photonics - methods
Photons
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Summary:A label-free optical biosensor based on a one-dimensional photonic crystal microring resonator with enhanced light-matter interaction is demonstrated. More than a 2-fold improvement in volumetric and surface sensing sensitivity is achieved compared to conventional microring sensors. The experimental bulk detection sensitivity is ~248nm/RIU and label-free detection of DNA and proteins is reported at the nanomolar scale. With a minimum feature size greater than 100nm, the photonic crystal microring resonator biosensor can be fabricated with the same standard lithographic techniques used to mass fabricate conventional microring resonators.
ISSN:1094-4087
1094-4087
DOI:10.1364/OE.25.007046