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arXiv · 1901.06302

Modelling spontaneous four-wave mixing in periodically-tapered waveguides

Mohammed F. Saleh
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Abstract

Periodically-tapered-waveguides technique is an emerging potential route to establish quasi-phase-matching schemes for efficient on-demand parametric interactions in third-order nonlinear materials. In this paper, I investigate this method in enhancing spontaneous photon-pairs emission in fibres and planar waveguides with sinusoidally-varying cross sections. I have developed a general robust quantum model to study this process under continuous or pulsed-pump excitations. The model shows a great enhancement in photon-pairs generation in waveguides with a small number of tapering periods that are feasible via the current fabrication technologies. I envisage that this work will open a new area of research to investigate how the tapering patterns can be fully optimised to tailor the spectral properties of the output photons in third-order nonlinear guided structures.

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Mohammed F. Saleh. 2019-01-18. Modelling spontaneous four-wave mixing in periodically-tapered waveguides. https://doi.org/10.1364/oe.27.011979

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