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Highly sensitive tuning of coupled optical ring resonators by microfluidics

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Abstract

The authors develop optofluidic coupled ring resonator (OCRR) system in which one of the ring resonators serves as a microfluidic channel. Highly sensitive tuning of the OCRR is demonstrated by making small changes in the refractive index of the fluid. A refractometric sensing scheme using the OCRR is proposed and demonstrated, allowing for measuring a refractive index change down to 10−9 refractive index units, two orders of magnitude better than a single ring resonator.

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Acknowledgments

The authors acknowledge the support from the Wallace Coulter Foundation Early Career Award and National Science Foundation-CAREER (CBET-0747398).

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Authors and Affiliations

  1. Biological Engineering Department, University of Missouri, Columbia, MO, 65211, USA

    Siyka I. Shopova, Yuze Sun & Xudong Fan

  2. Department of Physics, Oklahoma State University, Stillwater, OK, 74078, USA

    A. T. Rosenberger

Authors
  1. Siyka I. Shopova
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  2. Yuze Sun
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  3. A. T. Rosenberger
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  4. Xudong Fan
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Corresponding author

Correspondence to Xudong Fan.

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Shopova, S.I., Sun, Y., Rosenberger, A.T. et al. Highly sensitive tuning of coupled optical ring resonators by microfluidics. Microfluid Nanofluid 6, 425–429 (2009). https://doi.org/10.1007/s10404-008-0372-7

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  • DOI: https://doi.org/10.1007/s10404-008-0372-7

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