title: Photonic crystal microring resonator for label-free biosensing.
abstract: 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.
authors.forename: Stanley M
authors.initials: SM
authors.lastname: Lo
authors.forename: Shuren
authors.initials: S
authors.lastname: Hu
authors.forename: Girija
authors.initials: G
authors.lastname: Gaur
authors.forename: Yiorgos
authors.initials: Y
authors.lastname: Kostoulas
authors.forename: Sharon M
authors.initials: SM
authors.lastname: Weiss
authors.forename: Philippe M
authors.initials: PM
authors.lastname: Fauchet
mesh_terms: D015374:Biosensing Techniques / Q000379:methods*; D008027:Light; D055095:Optics and Photonics / Q000379:methods*; D017785:Photons