Jul 22 – 25, 2019
ECT* - Villa Tambosi
Europe/Rome timezone
Abstracts submission open. Posters do not require abstract submission.

Four-wave mixing and enhanced analog Hawking effect in a nonlinear optical waveguide

Jul 22, 2019, 4:15 PM
15m
Meeting room (ECT* - Villa Tambosi)

Meeting room

ECT* - Villa Tambosi

Strada delle Tabarelle, 286 38123 - Villazzano (TN) Italy

Speaker

Scott Robertson (Laboratoire de l'Accélérateur Linéaire, Orsay)

Description

We have studied the scattering of light on a soliton propagating in a waveguide, which has been proposed as an experimental system in which one could observe the analog Hawking effect. The linearized wave equation governing perturbations is shown to have the same structure as that governing phonon propagation in an atomic Bose condensate. By taking into account the full dispersion relation, the scattering coefficients encoding the production of photon pairs are shown to be amplified by a resonance effect related to the modulation instability occurring in the presence of a continuous wave. On the other hand, the scattering coefficients not subject to this enhancement behave similarly to those encoding the analog Hawking effect in subcritical flows. When using a realistic example of a silicon nitride waveguide on a silica substrate, we find that a soliton of duration 10 fs would spontaneously emit about one photon pair for every cm it travels. This rate is about six orders of magnitude larger than in previous works, making the effect readily observable.

Primary authors

Scott Robertson (Laboratoire de l'Accélérateur Linéaire, Orsay) Dr Charles Ciret (University of Angers) Dr Serge Massar (Université Libre de Bruxelles) Dr Simon-Pierre Gorza (Université Libre de Bruxelles) Renaud Parentani (Paris-Sud University)

Presentation materials