Analog gravity by an optical vortex: Resonance enhancement of Hawking radiation

Marco Ornigotti, Shimshon Bar-Ad, Alexander Szameit, Victor Fleurov

Research output: Contribution to journalArticlepeer-review


Propagation of coherent light in a Kerr nonlinear medium can be mapped onto a flow of an equivalent fluid. Here we use this mapping to model the conditions in the vicinity of a rotating black hole as a Laguerre-Gauss vortex beam. We describe weak fluctuations of the phase and amplitude of the electric field by wave equations in curved space, with a metric that is similar to the Kerr metric. We find the positions of event horizons and ergoregion boundaries, and the conditions for the onset of superradiance, which are simultaneously the conditions for a resonance in the analog Hawking radiation. The resonance strongly enhances the otherwise exponentially weak Hawking radiation at certain frequencies and makes its experimental observation feasible.

Original languageEnglish
Article number013823
JournalPhysical Review A
Issue number1
StatePublished - 17 Jan 2018

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics


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