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Optomechanics with Superfluid Helium-4

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Abstract

Here we present laser based readout and control of the Brownian motion of a thin film of superfluid helium formed around an optical microresonator. Detuned laser driving allows photothermal induced laser cooling and heating, while amplitude modulation probes the nonlinear Duffing interaction.

© 2015 Optical Society of America

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