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Bi-photon spectral correlation measurements from a silicon nanowire in the quantum and classical regimes

Title: Bi-photon spectral correlation measurements from a silicon nanowire in the quantum and classical regimes
Authors: Jizan, I
Helt, LG
Xiong, C
Collins, MJ
Choi, D-Y
Chae, CJ
Liscidini, M
Steel, MJ
Eggleton, BJ
Clark, AS
Item Type: Journal Article
Abstract: The growing requirement for photon pairs with specific spectral correlations in quantum optics experiments has created a demand for fast, high resolution and accurate source characterisation. A promising tool for such characterisation uses classical stimulated processes, in which an additional seed laser stimulates photon generation yielding much higher count rates, as recently demonstrated for a χ(2) integrated source in A. Eckstein et al. Laser Photon. Rev. 8, L76 (2014). In this work we extend these results to χ(3) integrated sources, directly measuring for the first time the relation between spectral correlation measurements via stimulated and spontaneous four wave mixing in an integrated optical waveguide, a silicon nanowire. We directly confirm the speed-up due to higher count rates and demonstrate that this allows additional resolution to be gained when compared to traditional coincidence measurements without any increase in measurement time. As the pump pulse duration can influence the degree of spectral correlation, all of our measurements are taken for two different pump pulse widths. This allows us to confirm that the classical stimulated process correctly captures the degree of spectral correlation regardless of pump pulse duration, and cements its place as an essential characterisation method for the development of future quantum integrated devices.
Issue Date: 28-Jul-2015
Date of Acceptance: 2-Jul-2015
URI: http://hdl.handle.net/10044/1/60867
DOI: https://dx.doi.org/10.1038/srep12557
ISSN: 2045-2322
Publisher: NATURE PUBLISHING GROUP
Journal / Book Title: SCIENTIFIC REPORTS
Volume: 5
Copyright Statement: © 2015 The Author(s). This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
Keywords: Science & Technology
Multidisciplinary Sciences
Science & Technology - Other Topics
PAIR GENERATION
WAVE-GUIDES
CRYSTAL
LIGHT
RESONATOR
FIBER
Science & Technology
Multidisciplinary Sciences
Science & Technology - Other Topics
PAIR GENERATION
WAVE-GUIDES
CRYSTAL
LIGHT
RESONATOR
FIBER
Publication Status: Published
Article Number: ARTN 12557
Online Publication Date: 2015-07-28
Appears in Collections:Quantum Optics and Laser Science
Physics
Faculty of Natural Sciences



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