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Sensors 2017, 17(10), 2256; https://doi.org/10.3390/s17102256

Optical Spring Effect in Micro-Bubble Resonators and Its Application for the Effective Mass Measurement of Optomechanical Resonant Mode

1
Key Lab for Micro and Nanophotonic Structures (Ministry of Education), Department of Optical Science and Engineering, School of Information Science and Engineering, Fudan University, Shanghai 200433, China
2
Department of Physics, Fudan University, Shanghai 200433, China
*
Author to whom correspondence should be addressed.
Received: 12 July 2017 / Revised: 21 September 2017 / Accepted: 26 September 2017 / Published: 30 September 2017
(This article belongs to the Special Issue Optical Fiber Sensors 2017)
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Abstract

In this work, we present a novel approach for obtaining the effective mass of mechanical vibration mode in micro-bubble resonators (MBRs). To be specific, the effective mass is deduced from the measurement of optical spring effect (OSE) in MBRs. This approach is demonstrated and applied to analyze the effective mass of hollow MBRs and liquid-filled MBRs, respectively. It is found that the liquid-filled MBRs has significantly stronger OSE and a less effective mass than hollow MBRs, both of the extraordinary behaviors can be beneficial for applications such as mass sensing. Larger OSE from higher order harmonics of the mechanical modes is also observed. Our work paves a way towards the developing of OSE-based high sensitive mass sensor in MBRs. View Full-Text
Keywords: whispering-gallery mode (WGM) microcavity; micro-bubble resonators; optomechanics; optical sensing and sensors; optical spring effect whispering-gallery mode (WGM) microcavity; micro-bubble resonators; optomechanics; optical sensing and sensors; optical spring effect
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Chen, Z.; Wu, X.; Liu, L.; Xu, L. Optical Spring Effect in Micro-Bubble Resonators and Its Application for the Effective Mass Measurement of Optomechanical Resonant Mode. Sensors 2017, 17, 2256.

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