Nonlinear Zel’dovich effect: parametric amplification from medium rotation

Faccio, D. and Wright, E. M. (2017) Nonlinear Zel’dovich effect: parametric amplification from medium rotation. Physical Review Letters, 118(9), 093901. (doi: 10.1103/PhysRevLett.118.093901)

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The interaction of light with rotating media has attracted recent interest for both fundamental and applied studies including rotational Doppler shift measurements. It is also possible to obtain amplification through the scattering of light with orbital angular momentum from a rotating and absorbing cylinder, as proposed by Zel’dovich more than forty years ago. This amplification mechanism has never been observed experimentally yet has connections to other fields such as Penrose superradiance in rotating black holes. Here we propose a nonlinear optics system whereby incident light carrying orbital angular momentum drives parametric interaction in a rotating medium. The crystal rotation is shown to take the phase-mismatched parametric interaction with negligible energy exchange at zero rotation to amplification for sufficiently large rotation rates. The amplification is shown to result from breaking of anti-PT symmetry induced by the medium rotation.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Faccio, Professor Daniele
Authors: Faccio, D., and Wright, E. M.
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Physical Review Letters
Publisher:American Physical Society
ISSN (Online):1079-7114
Copyright Holders:Copyright © 2017 The Authors
First Published:First published in Physical Review Letters 118(9):093901
Publisher Policy:Reproduced under a Creative Commons License

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