Single photon emission from ZnO nanoparticles
Sumin Choi, Brett C Johnson, Stefania Castelletto, Cuong Ton-That, Matthew R Phillips, Igor Aharonovich
Applied Physics Letters | AMER INST PHYSICS | Published : 2014
Room temperature single photon emitters are very important resources for photonics and emerging quantum technologies. In this work, we study single photon emission from defect centers in 20 nm zinc oxide (ZnO) nanoparticles. The emitters exhibit bright broadband fluorescence in the red spectral range centered at 640 nm with polarized excitation and emission. The studied emitters showed continuous blinking; however, bleaching can be suppressed using a polymethyl methacrylate coating. Furthermore, hydrogen termination increased the density of single photon emitters. Our results will contribute to the identification of quantum systems in ZnO. © 2014 AIP Publishing LLC.
Awarded by Australian Research Council
I.A. is the recipient of an Australian Research Council Discovery Early Career Research Award (Project No. DE130100592). B.C.J. acknowledges the Australian Research Council Centre for Quantum Computation and Communication Technology (CE110001027). Support from the Australian Research Council Grant No. DP0986951 is gratefully acknowledged. The authors would like to thank G. McCredie for technical support.