Single-photon emission and quantum characterization of zinc oxide defects

AJ Morfa; BC Gibson; M Karg; TJ Karle; AD Greentree; P Mulvaney; S Tomljenovic-Hanic

Journal article

Single-photon emission and quantum characterization of zinc oxide defects

AJ Morfa, BC Gibson, M Karg, TJ Karle, AD Greentree, P Mulvaney, S Tomljenovic-Hanic

Nano Letters | Published : 2012

DOI: 10.1021/nl204010e

Abstract

Room temperature single-photon emission and quantum characterization is reported for isolated defects in zinc oxide. The defects are observed in thin films of both in-house synthesized and commercial zinc oxide nanoparticles. Emission spectra in the red and infrared, second-order photon correlation functions, lifetime measurements, and photon count rates are presented. Both two- and three-state emitters are identified. Sub-band gap absorption and red emission suggest these defects are the zinc vacancy. These results identify a new source of single photons in a readily available wide band gap semiconductor material which has exceptional electrical, optical, and biocompatibility properties. © ..

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University of Melbourne Researchers

Paul Mulvaney Author

Snjezana Tomljenovic-Hanic Author

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Funding Acknowledgements

The authors wish to acknowledge Dr. David Simpson, Alastair Stacey, and Dr. Stefania Castelletto for helpful discussions about this work. This work was produced with the assistance of the University of Melbourne under the Interdisciplinary Seed Funding Scheme. S.T-H. is supported by the ARC Australian Research Fellowship (project number DP1096288). A.D.G. acknowledges the support of an ARC QEII Fellowship (project number DP0880466).