Journal article

Micro-concave waveguide antenna for high photon extraction from nitrogen vacancy centers in nanodiamond

R Rajasekharan, G Kewes, A Djalalian-Assl, K Ganesan, S Tomljenovic-Hanic, JC McCallum, A Roberts, O Benson, S Prawer

Scientific Reports | Nature Publishing Group: Open Access Journals - Option C | Published : 2015


The negatively charged nitrogen-vacancy colour center (NV(-) center) in nanodiamond is an excellent single photon source due to its stable photon generation in ambient conditions, optically addressable nuclear spin state, high quantum yield and its availability in nanometer sized crystals. In order to make practical devices using nanodiamond, highly efficient and directional emission of single photons in well-defined modes, either collimated into free space or waveguides are essential. This is a Herculean task as the photoluminescence of the NV centers is associated with two orthogonal dipoles arranged in a plane perpendicular to the NV defect symmetry axis. Here, we report on a micro-concav..

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Awarded by ARC

Awarded by ARC ARF fellowship

Awarded by DFG

Funding Acknowledgements

This research was supported by The University of Melbourne. AR acknowledges ARC support through Grant DP110100221. ST-H acknowledges her ARC ARF fellowship DP1096288. G.K. would like to thank the German Academic Exchange Service (DAAD) and the DFG (Sfb 951, HIOS) for financial support. The authors would like to acknowledge Timothy James and Timothy Karle for discussions. This work was performed in part at the Melbourne Centre for Nanofabrication (MCN) in the Victorian Node of the Australian National Fabrication Facility (ANFF). The numerical simulations were undertaken on the NCI National Facility in Canberra, Australia, which is supported by the Australian Commonwealth Government.