A picogram and nanometer scale photonic crystal opto-mechanical cavity

Details A picogram and nanometer scale photonic crystal opto-mechanical cavity A picogram and nanometer scale photonic crystal opto-mechanical cavity

2008-12-16

arxiv.org/abs/0812.2953v1

Nature 459, 550-555 (2009)

Physics

Optics

15 pages, 4 figures

Scientific paper

10.1038/nature08061

We describe the design, fabrication, and measurement of a cavity opto-mechanical system consisting of two nanobeams of silicon nitride in the near-field of each other, forming a so-called "zipper" cavity. A photonic crystal patterning is applied to the nanobeams to localize optical and mechanical energy to the same cubic-micron-scale volume. The picrogram-scale mass of the structure, along with the strong per-photon optical gradient force, results in a giant optical spring effect. In addition, a novel damping regime is explored in which the small heat capacity of the zipper cavity results in blue-detuned opto-mechanical damping.

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