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Narrow- and broadband single-photon sources using customised-tapered waveguides

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GreenwoodHR_0921_epsSS.pdf (5.756Mb)
Date
2021-09
Author
Greenwood, Harrison R.
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Abstract
Presented here are the findings of a recent thorough investigation into spontaneous parametric four-wave mixing processes in third-order nonlinear waveguides with continuous tapering patterns. It has been previously shown that these tapered devices can be exploited to quasi-phase-match the four-wave mixing process and enhance its conversion efficiency by several orders of magnitude. I start with validating the developed quantum model by reproducing the existing results in the literature. Furthermore, through selection of different tapering profiles, I show that these devices can serve as efficient sources of heralded single-photons, with either narrow or broadband spectral widths and at on-demand frequencies. Simultaneously, I was able to use the aforementioned model to determine the fibre length at which the spectral purity, an important property for quantum information applications, is maximised.
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http://hdl.handle.net/10399/4522
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©Heriot-Watt University, Edinburgh, Scotland, UK EH14 4AS.

Maintained by the Library
Tel: +44 (0)131 451 3577
Library Email: libhelp@hw.ac.uk
ROS Email: open.access@hw.ac.uk

Scottish registered charity number: SC000278

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AboutCopyright
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