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Observation of Stimulated Hawking Radiation in Optics

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arxiv 1808.09244 v4 pith:UI4TRU45 submitted 2018-08-28 gr-qc physics.optics

Observation of Stimulated Hawking Radiation in Optics

classification gr-qc physics.optics
keywords hawkingopticsradiationeventfiberlightnonlinearperturbation
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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The theory of Hawking radiation can be tested in laboratory analogues of black holes. We use light pulses in nonlinear fiber optics to establish artificial event horizons. Each pulse generates a moving perturbation of the refractive index via the Kerr effect. Probe light perceives this as an event horizon when its group velocity, slowed down by the perturbation, matches the speed of the pulse. We have observed in our experiment that the probe stimulates Hawking radiation, which occurs in a regime of extreme nonlinear fiber optics where positive and negative frequencies mix.

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