Highly sensitive tuning of coupled optical ring resonators by microfluidics

  • Siyka I. Shopova
  • Yuze Sun
  • A. T. Rosenberger
  • Xudong Fan
Short Communication

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.

Keywords

Coupled resonators Microfluidics Sensing 

Notes

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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Copyright information

© Springer-Verlag 2008

Authors and Affiliations

  • Siyka I. Shopova
    • 1
  • Yuze Sun
    • 1
  • A. T. Rosenberger
    • 2
  • Xudong Fan
    • 1
  1. 1.Biological Engineering DepartmentUniversity of MissouriColumbiaUSA
  2. 2.Department of PhysicsOklahoma State UniversityStillwaterUSA

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