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Dynamics of a vertical cavity quantum cascade phonon laser structure

Maryam, W.; Akimov, Andrey V.; Campion, R.P.; Kent, Anthony

Authors

W. Maryam

Andrey V. Akimov

R.P. Campion

Anthony Kent Anthony.Kent@Nottingham.ac.uk

Abstract

Driven primarily by scientific curiosity, but also by the potential applications of intense sources of coherent sound, researchers have targeted the phonon laser (saser) since the invention of the optical laser over 50 years ago. Here we fabricate a vertical cavity structure designed to operate as a saser oscillator device at a frequency of 325 GHz. It is based on a semiconductor superlattice gain medium, inside a multimode cavity between two acoustic Bragg reflectors. We measure the acoustic output of the device as a function of time after applying electrical pumping. The emission builds in intensity reaching a steady state on a timescale of order 0.1 μs. We show that the results are consistent with a model of the dynamics of a saser cavity exactly analogous to the models used for describing laser dynamics. We also obtain estimates for the gain coefficient, steady-state acoustic power output and efficiency of the device.

Journal Article Type Article
Publication Date Jul 25, 2013
Journal Nature Communications
Electronic ISSN 2041-1723
Publisher Nature Publishing Group
Peer Reviewed Peer Reviewed
Volume 4
Article Number 2184
Institution Citation Maryam, W., Akimov, A. V., Campion, R., & Kent, A. (2013). Dynamics of a vertical cavity quantum cascade phonon laser structure. Nature Communications, 4, doi:10.1038/ncomms3184
DOI https://doi.org/10.1038/ncomms3184
Publisher URL http://www.nature.com/ncomms/2013/130725/ncomms3184/full/ncomms3184.html
Copyright Statement Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by/4.0

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Copyright Statement
Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by/4.0




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