Logo of the Physikalisch-Technische Bundesanstalt

Angular emission of nitrogen-vacancy centers in nanodiamonds.


Single-photon sources have a wide field of implementation, e.g. in quantum key distribution, quantum computing, and quantum-enhanced optical measurements. Because of their negligible background and high suppression of multi-photon emission, single-photon sources have the potential to become a standard source in radiometry. Such source is necessary to close the gap between classical and quantum radiometry. The metrological realization of a room temperature absolute single-photon source based on a nitrogen-vacancy (NV-) center in nanodiamond was already carried out by the Physikalisch-Technische Bundesanstalt (PTB) via an unbroken traceability chain to the national standards [Rodiek, 2017].
In order to improve the understanding of the emission characteristics, we investigated the angular emission behavior of NV-centers in nanodiamonds. These NV-centers in nanodiamonds are located in the vicinity of a dielectric structure, namely a microscope cover glass. We will present the development of a model [based on Lukosz,1979] of the angular distribution of the emitted light. The angular dependent emission of NV-centers is measured by back focal plane imaging. Furthermore, the theoretical simulations of the radiation patterns are compared with the measurement of the angle dependent emission. The results will be shown at the symposium.

Rodiek, Beatrice; 4.5, Angewandte Radiometrie, PTB-Braunschweig
Christinck, Justus; 4.5, Angewandte Radiometrie, PTB-Braunschweig
Hofer, Helmuth; 4.5, Angewandte Radiometrie, PTB-Braunschweig
Georgieva, Hristina; 4.5, Angewandte Radiometrie, PTB-Braunschweig
López Ordonez, Marco Antonio; 4.5, Angewandte Radiometrie, PTB-Braunschweig
Kück, Stefan; 4, Optik, PTB-Braunschweig