Optical Fibre With Embedded Diamond Nanocrystals: Towards a High Collection Efficiency, Waveguided Single

Matthew R. Henderson, Shahraam Afshar V., Andrew D. Greentree, Tanya M. Monro

Published Jan 1, 2011• 0 citations

Abstract

A model for the capture of diamond colour centre emission by a step-index fibre, including effects due to the fibre core-cladding interface, is presented. We investigate the parameter space for optimal single photon capture.

Related papers

Optical Fibre With Embedded Diamond Nanocrystals: Towards a High Collection Efficiency, Waveguided Single Photon Source

Matthew R. Henderson, Shahraam Afshar V., Andrew D. Greentree +1 more

Jan 1, 20110 citations

Efficient coupling of emission of embedded single photon sources within optical fibres

M. Henderson, Shahraam Afshar Vahid, Andrew D. Greentree +2 more

We investigate the coupling of single photon emission from diamond colour centres embedded within the fibre core into the fibre’s guided modes. By approximating diamond colour centre emission as a dipole, we investigate the capture power for different core sizes and for various locations and orientations of the emitting dipole. We then use finite-difference time domain methods to check predictions of this calculation.

Jan 1, 20090 citations

Optical fibre with embedded diamond nanocrystals: Towards a high collection efficiency, waveguided single photon source

Henderson, Afshar, Greentree +1 more

Conference on Lasers and Electro-OpticsJan 1, 20110 citations

Nanodiamond in optical fibre.

Matthew R. Henderson

Diamond, prized as both a gemstone and a cutting and polishing material, has recently been recognised for another remarkable property, a host of optically active colour centre defects. With the rise of interest in these colour centres, due to the unique optical properties, comes a need for interfacing with other optical platforms. Recent advances have attempted to fabricate optical structures from the diamond itself, or to combine these colour centres with the well-known fabrication techniques of other materials by placing nanodiamond crystals on the surface of other structures, such as microdisks, microspheres, and optical fibres. This thesis presents a new approach to this integration by demonstrating the fabrication of a hybrid nanodiamond-glass material. This technique embeds the nanodiamond within the optical structure, offering interaction with the bound optical fields, protection, and ease of fabrication. A range of optical structures has previously been fabricated from the chosen glass, tellurite, and fabrication of an optical fibre is demonstrated here. Also presented is the derivation of a model describing coupling of an emitter to an optical fibre. While used here to investigate coupling of diamond colour centres to the optical fibre modes, it is more generally applicable to any emitter. These results show the first steps of a new approach to diamond integrated photonics.

Jan 1, 20130 citations

Diamond in fibre magnetometry: understanding the effects of step-index fibre design on dipole coupling

Shuo Li, Dongbi Bai, Andrew D. Greentree +4 more

Hybrid diamond-fibre systems are interesting as robust platforms for magnetometry. Here we model the coupling between diamond fluorescent emitters and guided fibre modes for three core-cladding ratios, and varying core diameter to inform our experimental investigations.

Conference on Lasers and Electro-Optics Pacific Rim (CLEO-PR)Jan 1, 20200 citations

Study for the development of a cavity enhanced single photon source

Elisa Da Ros

The nitrogen-vacancy defect in diamond (NV centre) is a leading candidate for solid-state implementations of quantum information technologies. Among other useful properties, it is a bright source of single photons. It is difficult, though, to collect the emitted photons in a single spatial and spectral mode which is often needed for quantum information applications. One way to improve the single-mode collection efficiency is to embed an NV centre in a high-finesse cavity. The coupling of the NV centre dipole to the cavity mode gives rise to the Purcell enhancement -- an increase of the emission into the cavity's spectral and spatial mode. The goal of this project will be to develop a fibre-based microcavity and to use it for the observation of enhanced single-photon emission from a diamond nanocrystal. It will involve a wide range of experimental techniques, for example basic optics (particularly Gaussian beam propagation), CO2 laser ablation, surface analysis by optical and atomic force microscopes, interferometry, photon counting, etc. There will also be a certain amount of data analysis, simulations and theoretical calculations.

Dec 1, 20140 citations