期刊
OPTICS EXPRESS
卷 18, 期 22, 页码 23236-23246出版社
OPTICAL SOC AMER
DOI: 10.1364/OE.18.023236
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资金
- Dynasty foundation
- Marie Curie Individual Fellowship
- ERC
- EU
- AFOSR
- NCCR of Quantum Photonics
The strength of optomechanical interactions in a cavity optomechanical system can be quantified by a vacuum coupling rate g(0) analogous to cavity quantum electrodynamics. This single figure of merit removes the ambiguity in the frequently quoted coupling parameter defining the frequency shift for a given mechanical displacement, and the effective mass of the mechanical mode. Here we demonstrate and verify a straightforward experimental technique to derive the vacuum optomechanical coupling rate. It only requires applying a known frequency modulation of the employed electromagnetic probe field and knowledge of the mechanical oscillator's occupation. The method is experimentally verified for a micromechanical mode in a toroidal whispering-gallery-resonator and a nanomechanical oscillator coupled to a toroidal cavity via its near field. (C) 2010 Optical Society of America
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