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Parametric interaction of the electric and acoustic fields in a sapphire monocrystal transducer with a microwave readout

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4 Author(s)
Locke, C.R. ; Department of Physics, The University of Western Australia, Nedlands 6907, Western Australia, Australia ; Tobar, M.E. ; Ivanov, E.N. ; Blair, D.G.

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A sapphire monocrystal configured with a parametric microwave readout can potentially monitor the motion of its internal acoustic resonances at the precision governed by quantum mechanical fluctuations. The mechanism of transductance is due to parametric interaction between the electric and acoustic field within the crystal. This mechanism has been tested for the first time, and the theory has been verified by observing the pump frequency dependence of the acoustic quality factor. Because of the extremely low acoustic losses (Q≫107) and electrical losses (Q≫104), measurements were sensitive enough to attain positive verification at room temperature. © 1998 American Institute of Physics.

Published in:

Journal of Applied Physics  (Volume:84 ,  Issue: 12 )