Triggered Single-photon Source based on Photoluminescence of Nickel-related Colour Centres in CVD-grown Nanodiamonds
- PDF / 507,193 Bytes
- 4 Pages / 612 x 792 pts (letter) Page_size
- 17 Downloads / 165 Views
1039-P12-02
Triggered Single-photon Source based on Photoluminescence of Nickel-related Colour Centres in CVD-grown Nanodiamonds E Wu1,2, James Rabeau3,4, François Treussart1, Vincent Jacques1, Heping Zeng2, Steven Prawer3, Philippe Grangier5, and Jean-François Roch1 1 Laboratoire de Photonique Quantique et Moléculaire, UMR 8537, Ecole Normale Supérieure de Cachan and CNRS, 61 avenue du président Wilson, Cachan, 94235, France 2 Key Laboratory of Optical and Magnetic Resonance Spectroscopy, East China Normal University, Shanghai, 200062, China, People's Republic of 3 School of Physics, University of Melbourne, Melbourne, Victoria 3010, Australia 4 Department of Physics, Macquarie University, Sydney, New South Wales 2109, Australia 5 Laboratoire Charles Fabry, UMR 8501, Institut d'Optique Graduate School and CNRS, Campus Polytechnique, RD 128, Palaiseau, 91127, France ABSTRACT We report on the realization of a solid-state single-photon source in the near infrared at room temperature. It is based on the photoluminescence of a single NE8 colour center in a CVD grown diamond nanocrystal. Antibunching has been observed in the fluorescence light under both continuous and pulsed excitation. Our source delivers 30 kcts/s single-photon pulses at an excitation repetition rate of 20 MHz.
INTRODUCTION Due to its fascinating luminescence properties, e.g. its near perfect room temperature photostability, the Nitrogen-Vacancy [N-V] colour centre in diamond has been demonstrated as a remarkable source for emitting single-photon light pulses on demand [1]. This system has been used to implement single-photon quantum key distribution within realistic operating conditions [2] and to observe single-photon interference as examples of wave-particle duality [3,4]. However, the spectral finesse of the emitted single-photon pulses is poor, corresponding to a spectral width of almost 100 nm at room temperature. Spectral filtering is a practical solution, but it also decreases the effective single-photon emission rate. The wide variety of colour centres in diamond offers a unique opportunity to optimize single-photon emission properties. Recently, Nickel-related point defects in diamond arose strong interest. These defects can be found in some natural type II-a diamonds and also in highpressure high-temperature diamonds where Nickel is used as a solvent/catalyst for the crystal growth. Compared to the [N-V] colour centre emission, the photoluminescence of individual Nirelated colour centre has several striking features [5,6]: a narrow band emission around 800 nm almost entirely concentrated in the zero phonon line (ZPL), corresponding to a spectral width of the order of 1 nm; a nanosecond excited level lifetime; and a linearly polarized light emission. It was also shown that these colour centres can be fabricated in a controlled way in chemical vapor deposited (CVD) diamond thin films [7,8]. This breakthrough in diamond defect control opens numerous possibilities for the development of highly efficient diamond-based single-photon sources.
Data Loading...
