Journal article
Lifetime Reduction and Enhanced Emission of Single Photon Color Centers in Nanodiamond via Surrounding Refractive Index Modification
A Khalid, K Chung, R Rajasekharan, DWM Lau, TJ Karle, BC Gibson, S Tomljenovic-Hanic
Scientific Reports | Macmillan Publishers Limited | Published : 2015
DOI: 10.1038/srep11179
Abstract
The negatively-charged nitrogen vacancy (NV') center in diamond is of great interest for quantum information processing and quantum key distribution applications due to its highly desirable long coherence times at room temperature. One of the challenges for their use in these applications involves the requirement to further optimize the lifetime and emission properties of the centers. Our results demonstrate the reduction of the lifetime of NV' centers, and hence an increase in the emission rate, achieved by modifying the refractive index of the environment surrounding the nanodiamond (ND). By coating the NDs in a polymer film, experimental results and numerical calculations show an average ..
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Funding Acknowledgements
R.R acknowledges Mckenzie Fellowship and UoM start up grants. B.C.G. is supported by an ARC Future Fellowship (FT110100225). S.T-H. is supported by an ARC Australian Research Fellowship (DP1096288). This work was performed in part at the Melbourne Center for Nanofabrication (MCN) in the Victorian Node of the Australian National Fabrication Facility (ANFF). The numerical part of research was undertaken with the assistance of resources provided at the NCI National Facility systems at The Australian National University through the National Computational Merit Allocation Scheme supported by the Australian Government.