title: Raman spectroscopy with an integrated arrayed-waveguide grating.
abstract: An integrated arrayed-waveguide grating fabricated in silicon-oxynitride technology is applied to Raman spectroscopy. After its validation by reproducing the well-known spectrum of cyclohexane, polarized Raman spectra are measured of extracted human teeth containing localized initial carious lesions. Excellent agreement is obtained between the spectra of healthy and carious tooth enamel measured with our integrated device and spectra recorded using a conventional Raman spectrometer. Our results represent a step toward the realization of compact, hand-held, integrated spectrometers, e.g. for the detection of dental caries at an early stage.
authors.affiliation: Integrated Optical MicroSystems Group, MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands. N.Ismail@ewi.utwente.nl
authors.forename: N
authors.initials: N
authors.lastname: Ismail
authors.forename: L-P
authors.initials: LP
authors.lastname: Choo-Smith
authors.forename: K
authors.initials: K
authors.lastname: Wörhoff
authors.forename: A
authors.initials: A
authors.lastname: Driessen
authors.forename: A C
authors.initials: AC
authors.lastname: Baclig
authors.forename: P J
authors.initials: PJ
authors.lastname: Caspers
authors.forename: G J
authors.initials: GJ
authors.lastname: Puppels
authors.forename: R M
authors.initials: RM
authors.lastname: de Ridder
authors.forename: M
authors.initials: M
authors.lastname: Pollnau
mesh_terms: D003731:Dental Caries / Q000175:diagnosis / Q000378:metabolism; D003743:Dental Enamel / Q000737:chemistry; D006801:Humans; D055620:Optical Phenomena; D013059:Spectrum Analysis, Raman / Q000295:instrumentation*