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Optomechanical transduction and characterization of a silica microsphere pendulum via evanescent light
Madugani, Ramgopal; Yang, Yong; Ward, Jonathan M.; Le, Vu H.; Nic Chormaic, Síle
Dissipative optomechanics has some advantages in cooling compared to the conventional dispersion dominated systems. Here, we study the optical response of a cantilever-like, silica, microsphere pendulum, evanescently coupled to a fiber taper. In a whispering gallery mode resonator, the cavity mode and motion of the pendulum result in both dispersive and dissipative optomechanical interactions. This unique mechanism leads to an experimentally observable, asymmetric response function of the transduction spectrum, which can be explained using coupled-mode theory. The optomechanical transduction and its relationship to the external coupling gap are investigated, and we show that the experimental behavior is in good agreement with the theoretical predictions. A deep understanding of this mechanism is necessary to explore trapping and cooling in dissipative optomechanical systems. (C) 2015 AIP Publishing LLC.
Keyword(s): Resolved-side-bandinduced; Transparency; Mode; Microcavities; Resonators; Oscillator; Field; Whispering gallery wave modes; Dispersion; Optomechanics; Disperse systems; Optical resonators
Publication Date:
Type: Journal article
Peer-Reviewed: Yes
Language(s): English
Institution: University College Cork
Citation(s): Madugani, R., Ward, J. M., Le, V. H. and Chormaic, S. N. (2015) 'Optomechanical transduction and characterization of a silica microsphere pendulum via evanescent light', Applied Physics Letters, 106(24), pp. 241101. doi: 10.1063/1.4922637
Publisher(s): AIP Publishing
File Format(s): application/pdf
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First Indexed: 2017-09-06 06:39:09 Last Updated: 2019-06-15 06:42:09