Demonstration of mode splitting in an optical microcavity in aqueous environment
arXiv:1011.1211 · doi:10.1063/1.3481352
Abstract
Scatterer induced modal coupling and the consequent mode splitting in a whispering gallery mode resonator is demonstrated in aqueous environment. The rate of change in splitting as particles enter the resonator mode volume strongly depends on the concentration of particle solution: The higher is the concentration, the higher is the rate of change. Polystyrene nanoparticles of radius 50nm with concentration as low as 5x10^(-6)wt% have been detected using the mode splitting spectra. Observation of mode splitting in water paves the way for constructing advanced resonator based sensors for measuring nanoparticles and biomolecules in various environments.
arXiv comment8 pages, 4 figures, 21 References
References in corpus (3)
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- Raman-gain induced loss-compensation in whispering-gallery-microresonators and single-nanoparticle detection with whispering-gallery Raman-microlasers
- Observation and characterization of mode splitting in microsphere resonators in aquatic environment
- Interferometric detection of mode splitting for whispering gallery mode biosensors
- Detection and size measurement of individual hemozoin nanocrystals in aquatic environment using a whispering gallery mode resonator
- Statistics of multiple-scatterer induced frequency splitting in whispering gallery microresonators and microlasers
- Mass sensing by detecting the quadrature of a coupled light field
- Inverted-wedge silica resonators for controlled and stable coupling
- Theory of the nanoparticle-induced frequency shifts of whispering-gallery-mode resonances in spheroidal optical resonators