Dresden 2011 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 44: Quantum Optics of Solid State Photon Sources
Q 44.3: Vortrag
Donnerstag, 17. März 2011, 11:15–11:30, HSZ 02
Studying Photon Number Distributions of (NV-) Single-Photon Centres — •Waldemar Schmunk1, Marco Gramegna3, Giorgio Brida3, Ivo P. Degiovanni3, Marco Genovese3, Helmuth Hofer1, Stefan Kück1, Lapo Lolli3, Matteo G.A. Paris4, Silke Peters1, Mauro Rajteri3, Mark Rodenberger1, Andras Ruschhaupt2, Emanuele Taralli3, and Paolo Traina3 — 1Physikalisch-Technische Bundesanstalt, 38116 Braunschweig, Germany — 2Leibniz Universtität Hannover, 30167 Hannover, Germany — 3L’Istituto Nazionale di Ricerca Metrologica INRIM, 10135 Torino, Italy — 4Universita degli studi di Milano, 20122 Milano, Italy
Reconstruction of the optical density matrix provides information on photon number distributions of unknown quantum states. In the present work we focus on the photon statistics of different nitrogen vacancies centres in diamond. For that purpose, the diagonal elements of the density matrix were experimentally determined by using a transition-edge sensor (TES), which produces an output pulse proportional to the number of photons absorbed and is therefore capable to resolve the photon number. Additional measurements were performed by on/off-statistics using avalanche photodetection assisted by a maximum likelihood estimation. From the data of the two photon number resolving techniques, values of the second order correlation function g(2)(t = 0) were determined and compared with the corresponding values measured by a Hanbury-Brown-Twiss interferometer. In the presentation, the three methods will be described and discussed in detail.