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

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