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A phonon laser

Vahala, K. and Herrmann, M. and Knünz, S. and Batteiger, V. and Saathoff, G. and Hänsch, T. W. and Udem, Th. (2009) A phonon laser. Nature Physics, 5 (9). pp. 682-686. ISSN 1745-2473. doi:10.1038/nphys1367.

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Red-detuned laser pumping of an atomic resonance will cool the motion of an ion or atom. The complementary regime of blue-detuned pumping is investigated in this work using a single, trapped Mg+ ion interacting with two laser beams, tuned above and below resonance. Widely thought of as a regime of heating, theory and experiment instead show that stimulated emission of centre-of-mass phonons occurs, providing saturable amplification of the motion. A threshold for transition from thermal to coherent oscillating motion has been observed, thus establishing this system as a mechanical analogue to an optical laser -— a phonon laser. Such a system has been sought in many different physical contexts.

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Vahala, K.0000-0003-1783-1380
Additional Information:© 2009 Nature Publishing Group. Received 3 January 2009; Accepted 3 July 2009; Published online 16 August 2009. The authors thank P. Toschek for review and comments on the manuscript. K.V. gratefully acknowledges support from the Alexander von Humboldt Foundation and also thanks the California Institute of Technology. T.W.H. gratefully acknowledges support by the Max-Planck Foundation. Author Contributions: M.H., S.K., V.B. and G.S. carried out measurements. K.V., M.H. and Th.U. carried out simulations. K.V., M.H., Th.U. and T.W.H. developed the concepts. All authors worked together to plan the measurements and write the manuscript. Supplementary information accompanies this paper on
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Alexander von Humboldt FoundationUNSPECIFIED
Max-Planck FoundationUNSPECIFIED
Issue or Number:9
Record Number:CaltechAUTHORS:20091013-093447878
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:16296
Deposited By: George Porter
Deposited On:22 Oct 2009 18:28
Last Modified:08 Nov 2021 23:25

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