Three-dimensional photonic devices fabricated by ultrafast lasers for optical sensing in lab-on-a-chip

R. Martínez Vázquez, R. Osellame, A. Crespi, C. Dongre, Hugo Hoekstra, Markus Pollnau, H. van den Vlekkert, R. van Weeghel, P. Watts, R. Ramponi, G. Cerullo

    Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

    1 Citation (Scopus)


    We report on the use of femtosecond laser pulses to fabricate photonic devices (waveguides and interferometers) inside commercial CE chips without affecting the manufacturing procedure of the microfluidic part of the device. The fabrication of single waveguides intersecting the channels allows one to perform absorption or Laser Induced Fluorescence (LIF) sensing of the molecules separated inside the microchannels. Microfluidic channels, with access holes, are fabricated using femtosecond laser irradiation followed by chemical etching. Mach-Zehnder interferometers are used for label-free sensing of the samples flowing in the microfluidic channels by means of refractive index changes detection.
    Original languageEnglish
    Title of host publicationProceedings of the SPIE, the international Society for Optical Engineering
    EditorsJoseph Neev, Stefan Nolte, Alexander Heisterkamp, Rick P. Trebino
    Place of PublicationBellinham, WA, USA
    Number of pages11
    ISBN (Print)978-0-81947-449-0
    Publication statusPublished - 24 Feb 2009

    Publication series

    NameProceedings of SPIE
    PublisherSPIE, Society of Photo-Optical Instrumentation Engineers
    ISSN (Print)0277-786X


    • Mach Zehnder interferometers
    • IOMS-APD: Active Photonic Devices
    • Optical sensing
    • Lab on a chip
    • laser induced fluorescence

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