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Issue 15, 2012
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Lab-in-a-tube: on-chip integration of glass optofluidic ring resonators for label-free sensing applications

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Abstract

The fabrication of tubular rolled-up optofluidic ring resonators (RU-OFRRs) based on glass (SiO2) material with high quality factors is reported. A novel methodology combining lab-on-a-chip fabrication methods and rolled-up nanotech is presented for the fabrication of fully integrated tubular optofluidic sensors. The microfluidic integration of several RU-OFRRs on one chip is solved by enclosing the microtubes with a patterned robust SU-8 polymeric matrix. A viewport on each microtube enables exact excitation and monitoring of whispering gallery modes with a photoluminescence spectroscopy system under constant ambient conditions, while exchanging the content of the RU-OFRR with liquids of different refractive indices. The refractrometric sensor capabilities are investigated regarding signal stability, sensitivity and reliability. The sensitivity of the integrated RU-OFRR, which is the response of the modes to the change in refractive index of the liquid, is up to 880 nm/refractive index units (RIU).

Graphical abstract: Lab-in-a-tube: on-chip integration of glass optofluidic ring resonators for label-free sensing applications

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Publication details

The article was received on 19 Mar 2012, accepted on 14 May 2012 and first published on 15 May 2012


Article type: Paper
DOI: 10.1039/C2LC40275K
Citation: Lab Chip, 2012,12, 2649-2655
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    Lab-in-a-tube: on-chip integration of glass optofluidic ring resonators for label-free sensing applications

    S. M. Harazim, V. A. Bolaños Quiñones, S. Kiravittaya, S. Sanchez and O. G. Schmidt, Lab Chip, 2012, 12, 2649
    DOI: 10.1039/C2LC40275K

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