Mainz 2017 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 31: Poster: Quantum Optics and Photonics I

Q 31.68: Poster

Tuesday, March 7, 2017, 17:00–19:00, P OG1+2

Towards single NV centers in nanostructures as probes for optical near fields — •Alexander Meyer, Richard Nelz, Michel Challier, Selda Sonusen, Ettore Bernardi, and Elke Neu — Universität des Saarlandes, Fakultät NT - Fachrichtung Physik, Campus E2.6, 66123 Saarbrücken

Single nitrogen vacancy (NV) color centers in nanostructured diamond are photostable dipoles, forming single photon sources. Since the excited state lifetime depends on the environment of the NV, it is possible to detect environmental changes via lifetime imaging. The hereby gathered information reveals the quantum efficiency of NV centers in these nanostructures [1]; a parameter highly crucial for the usability of NV centers as probes for optical near fields. As a way to change the environment and simultaneously measure the excited state lifetime, we use a home-built combination of an atomic-force and a confocal microscope. We here present preliminary results of proof-of-principle experiments to analyze the quantum efficiency of shallow NV centers in single-crystal nanostructures.
[1] Mohtashami and Koenderink, New J. Phys. 15 043017 (2013)