Cooling the mechanical motion of a tapered optical fiber and a microsphere-cantilever using whispering gallery modes

Y. Lia Li; J. Millen; P. F. Barker

doi:10.1117/12.2238960

16 September 2016 Cooling the mechanical motion of a tapered optical fiber and a microsphere-cantilever using whispering gallery modes

Y. Lia Li, J. Millen, P. F. Barker

Author Affiliations +

Proceedings Volume 9922, Optical Trapping and Optical Micromanipulation XIII; 99220B (2016) https://doi.org/10.1117/12.2238960
Event: SPIE Nanoscience + Engineering, 2016, San Diego, California, United States

Abstract

Light coupled from a tapered optical fiber is used to excite the morphology dependent whispering gallery mode (WGM) resonances of a silica microsphere-cantilever. Using the optomechanical transduction from the WGM supported by the microsphere¹, we can simultaneously detect the thermal Brownian motion of both the microsphere-cantilever and the tapered fiber used for coupling. This allows for active feedback cooling of multiple mechanical modes of the tapered fiber and the microsphere-cantilever using the optical dipole force and a piezo-stack². Stabilisation of the coupling junction by employing simultaneous cooling of both oscillators is also presented², useful for many hybrid WGM systems coupled with a tapered waveguide.

Citation Download Citation

Y. Lia Li, J. Millen, and P. F. Barker "Cooling the mechanical motion of a tapered optical fiber and a microsphere-cantilever using whispering gallery modes", Proc. SPIE 9922, Optical Trapping and Optical Micromanipulation XIII, 99220B (16 September 2016); https://doi.org/10.1117/12.2238960

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