Grudinin, Ivan S. and Lee, Hansuek and Painter, O. J. and Vahala, Kerry J. (2010) Phonon Laser Action in a Tunable Two-Level System. Physical Review Letters, 104 (8). 083901. ISSN 0031-9007 http://resolver.caltech.edu/CaltechAUTHORS:20100330-110228296
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The phonon analog of an optical laser has long been a subject of interest. We demonstrate a compound microcavity system, coupled to a radio-frequency mechanical mode, that operates in close analogy to a two-level laser system. An inversion produces gain, causing phonon laser action above a pump power threshold of around 7 μW. The device features a continuously tunable gain spectrum to selectively amplify mechanical modes from radio frequency to microwave rates. Viewed as a Brillouin process, the system accesses a regime in which the phonon plays what has traditionally been the role of the Stokes wave. For this reason, it should also be possible to controllably switch between phonon and photon laser regimes. Cooling of the mechanical mode is also possible.
|Additional Information:||© 2010 The American Physical Society. Received 15 July 2009; revised manuscript received 2 December 2009; published 22 February 2010. Selected for a Viewpoint in Physics (v.3:16 (2010)), published Feb. 22, 2010. This work was supported by DARPA.|
|Classification Code:||PACS numbers: 42.60.Da, 42.55.-f, 71.36.+c|
|Official Citation:||Grudinin, I. S., H. Lee, et al. (2010). "Phonon Laser Action in a Tunable Two-Level System." Physical Review Letters 104(Copyright (C) 2010 The American Physical Society): 083901.|
|Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||Tony Diaz|
|Deposited On:||30 Mar 2010 22:46|
|Last Modified:||26 Dec 2012 11:55|
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