Nonlinear Zel'dovich effect: Parametric amplification from medium rotation

Daniele Franco Angelo Faccio, Ewan M. Wright

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)
64 Downloads (Pure)


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 40 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.
Original languageEnglish
Article number093901
JournalPhysical Review Letters
Issue number9
Early online date27 Feb 2017
Publication statusPublished - 3 Mar 2017


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