Journal article

Room Temperature Quantum Emission from Cubic Silicon Carbide Nanoparticles

Stefania Castelletto, Brett C Johnson, Cameron Zachreson, David Beke, Istvan Balogh, Takeshi Ohshima, Igor Aharonovich, Adam Gali

ACS Nano | AMER CHEMICAL SOC | Published : 2014

Abstract

The photoluminescence (PL) arising from silicon carbide nanoparticles has so far been associated with the quantum confinement effect or to radiative transitions between electronically active surface states. In this work we show that cubic phase silicon carbide nanoparticles with diameters in the range 45-500 nm can host other point defects responsible for photoinduced intrabandgap PL. We demonstrate that these nanoparticles exhibit single photon emission at room temperature with record saturation count rates of 7 × 10(6) counts/s. The realization of nonclassical emission from SiC nanoparticles extends their potential use from fluorescence biomarker beads to optically active quantum elements ..

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Grants

Awarded by Australian Research Council, Centre of Excellence Engineered Quantum Systems


Awarded by Australian research council


Awarded by Hungarian OTKA


Awarded by European Social Fund


Funding Acknowledgements

S.C. acknowledges initial financial support from the Australian Research Council, Centre of Excellence Engineered Quantum Systems (CE110001013). B.C.J. acknowledges the Australian Research Council Centre for Quantum Computation and Communication Technology (CE110001027). LA. is the recipient of an Australian research council discovery early career research award (project number DE130100592). A.G. acknowledges the dynamic light scattering measurements by Eszter Gergely-Fulop from the Research Centre for Natural Sciences, the support from the Lendulet programme of the Hungarian Academy of Sciences, and the Hungarian OTKA Grants No. K101819 and K106114. D.B. acknowledges the support from the European Union and the State of Hungary, cofinanced by the European Social Fund in the framework of TAMOP-4.2.4.A/2-11/1-2012-0001 "National Excellence Program". We acknowledge Kerem Bray, Rodolfo Previdi and Olga Shimoni for assistance with DLS measurements at UTS.