Demonstration of mode splitting in an optical microcavity in aqueous environment

Woosung Kim; Ŝahin Kaya Özdemir; Jiangang Zhu; Lina He; Lan Yang

doi:10.1063/1.3481352

Demonstration of mode splitting in an optical microcavity in aqueous environment

Woosung Kim, Ŝahin Kaya Özdemir, Jiangang Zhu, Lina He, Lan Yang

Engineering Science and Mechanics

Research output: Contribution to journal › Article › peer-review

62 Scopus citations

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 50 nm with concentration as low as 5× 10^-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.

Original language	English (US)
Article number	071111
Journal	Applied Physics Letters
Volume	97
Issue number	7
DOIs	https://doi.org/10.1063/1.3481352
State	Published - Aug 16 2010

All Science Journal Classification (ASJC) codes

Physics and Astronomy (miscellaneous)

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10.1063/1.3481352

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title = "Demonstration of mode splitting in an optical microcavity in aqueous environment",

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 50 nm with concentration as low as 5× 10-6 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.",

author = "Woosung Kim and {\"O}zdemir, {Ŝahin Kaya} and Jiangang Zhu and Lina He and Lan Yang",

note = "Funding Information: The authors acknowledge the support from CMI and MISA at Washington University in St. Louis and NSF (Grant No. 0954941). This work was performed in part at the NRF of Washington University in St. Louis, which is a member of NNIN and supported by the NSF (Award No. ECS-0335765).",

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AU - Kim, Woosung

AU - Özdemir, Ŝahin Kaya

AU - Zhu, Jiangang

AU - He, Lina

AU - Yang, Lan

N1 - Funding Information: The authors acknowledge the support from CMI and MISA at Washington University in St. Louis and NSF (Grant No. 0954941). This work was performed in part at the NRF of Washington University in St. Louis, which is a member of NNIN and supported by the NSF (Award No. ECS-0335765).

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N2 - 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 50 nm with concentration as low as 5× 10-6 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.

AB - 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 50 nm with concentration as low as 5× 10-6 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.

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Demonstration of mode splitting in an optical microcavity in aqueous environment

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