Hannover 2016 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 11: Poster: Quantum Optics and Photonics I
Q 11.24: Poster
Montag, 29. Februar 2016, 16:30–19:00, Empore Lichthof
Characterisation of efficient single-photon sources based on nitrogen-vacancy centres for radiometric applications — •Beatrice Rodiek1, Marco López1, Helmuth Hofer1, Stefan Kück1, Xiao-Liu Chu2, and Stefan Götzinger2 — 1Physikalisch Technische Bundesanstalt, Bundesallee 100, 38116 Braunschweig — 2Max Planck Institute for the Science of Light, 91058 Erlangen, Germany
Single-photon sources (SPS) play today an important role in quantum metrology. The main aim is to realize a SPS with a high photon rate while the background and the multi-photon emission rates are still low. Such a single-photon source would be a candidate for a standard source for radiometry. One way of a SPS realisation is based on colour centres in nanocrystals. At PTB, we are working on SPS based on nitrogen-vacancy- (NV-) centres in nanodiamonds, for their use in the calibration of single photon detectors. To investigate these sources, we use a confocal microscope setup that allows us to excite the colour centres and also to collect the fluorescent emission of the source. The colour centres are characterized in terms of spectrum, count rate, anti-bunching and stability. A photon rate of approx. 650 kphotons per second at the detector with a high single photon emission purity, indicated by the g2(0)-value as low as 0.05 was obtained. Further results and details of the setup will be presented at the conference.