Near-zero anomalous dispersion Ge11.5As24Se64.5 glass nanowires for correlated photon pair generation: Design and analysis

X. Gai*, R. P. Wang, C. Xiong, M. J. Steel, B. J. Eggleton, B. Luther-Davies

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)
25 Downloads (Pure)

Abstract

We show that highly nonlinear chalcogenide glass nanowire waveguides with near-zero anomalous dispersion should be capable of generating correlated photon-pairs by spontaneous four-wave mixing at frequencies detuned by over 17 THz from the pump where Raman noise is absent. In this region we predict a photon pair correlation of >100, a figure of merit >10 and brightness of ̃8×108 pairs/s over a bandwidth of >15 THz in nanowires with group velocity dispersion of <5 ps·km-1nm -1. We present designs for double-clad Ge11.5As 24Se64.5 glass nanowires with realistic tolerance to fabrication errors that achieve near-zero anomalous dispersion at a 1420 nm pump wavelength. This structure has a fabrication tolerance of 80-170 nm in the waveguide width and utilizes a SiO2/Al2O3 layer deposited by atomic layer deposition to compensate the fabrication errors in the film thickness.

Original languageEnglish
Pages (from-to)776-786
Number of pages11
JournalOptics Express
Volume20
Issue number2
DOIs
Publication statusPublished - 16 Jan 2012

Bibliographical note

This paper was published in Optics Express and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://www.opticsinfobase.org/oe/abstract.cfm?uri=oe-20-2-776. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.

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