Forced and self-excited oscillations of an optomechanical cavity

Zaitsev, S and Pandey, Ashok Kumar and Shtempluck, O and Buks, E (2011) Forced and self-excited oscillations of an optomechanical cavity. Physical Review E - Statistical, Nonlinear, and Soft Matter Physics, 84 (4). pp. 1-10. ISSN 1539-3755

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We experimentally study forced and self-excited oscillations of an optomechanical cavity, which is formed between a fiber Bragg grating that serves as a static mirror and a freely suspended metallic mechanical resonator that serves as a moving mirror. In the domain of small amplitude mechanical oscillations, we find that the optomechanical coupling is manifested as changes in the effective resonance frequency, damping rate, and cubic nonlinearity of the mechanical resonator. Moreover, self-excited oscillations of the micromechanical mirror are observed above a certain optical power threshold. A comparison between the experimental results and a theoretical model that we have recently derived and analyzed yields a good agreement. The comparison also indicates that the dominant optomechanical coupling mechanism is the heating of the metallic mirror due to optical absorption.

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IITH Creators:
IITH CreatorsORCiD
Pandey, Ashok KumarUNSPECIFIED
Item Type: Article
Uncontrolled Keywords: Coupling mechanism; Cubic nonlinearities; Damping rate; Mechanical oscillations; Mechanical resonators; Metallic mirrors; Micromechanical mirror; Moving mirrors; Optical power; Optomechanical; Resonance frequencies; Self excited oscillation; Small amplitude; Theoretical models
Subjects: Physics > Astronomy Astrophysics
Divisions: Department of Electrical Engineering
Depositing User: Team Library
Date Deposited: 30 Oct 2014 05:24
Last Modified: 10 Nov 2017 06:24
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