Journal article
Room-temperature single-photon emitters in titanium dioxide optical defects
K Chung, YH Leung, CH To, AB Djurišić, S Tomljenovic-Hanic
Beilstein Journal of Nanotechnology | BEILSTEIN-INSTITUT | Published : 2018
DOI: 10.3762/bjnano.9.100
Abstract
Fluorescence properties of crystallographic point defects within different morphologies of titanium dioxide were investigated. For the first time, room-temperature single-photon emission in titanium dioxide optical defects was discovered in thin films and commercial nanoparticles. Three-level defects were identified because the g(2) correlation data featured prominent shoulders around the antibunching dip. Stable and blinking photodynamics were observed for the single-photon emitters. These results reveal a new room-temperature single-photon source within a wide bandgap semiconductor.
Grants
Awarded by ARC Australian Research Fellowship
Funding Acknowledgements
K.C. would like to acknowledge Melbourne Research Scholarship awarded by The University of Melbourne. S.T.-H. acknowledges an ARC Australian Research Fellowship (DP1096288). A.B.D. acknowledges financial support from the Seed Funding for Basic Research, The University of Hong Kong. We would also like to thank A. H. Piracha for additional help in annealing TiO2 thin film samples and D.A. Simpson for helpful discussion concerning the manuscript.