Regensburg 2013 – scientific programme

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O: Fachverband Oberflächenphysik

O 53: Scanning Probe Methods II

O 53.8: Talk

Wednesday, March 13, 2013, 17:45–18:00, H31

Three dimensional scanning lifetime microscopy using diamond — •Philip Engel, Andreas W. Schell, and Oliver Benson — Humboldt-Universität zu Berlin, AG Nanooptik

Knowledge of the local density of optical states (LDOS) is important for the design of nanoscale enviroments for controlled light matter interaction. Here, we use the nitrogen vacancy (NV) defect center in nanodiamond as nanoscale probe for the LDOS. The NV defect center has a long-term stability even at room-temperature, which makes it an ideal candidate as a pointlike probe glued on an atomic force microscopy tip. Due to Fermi's golden rule the LDOS can be directly measured via lifetime changes of an emitter. Recently this was shown with fluorescent dye beads in two dimensions [1]. Our technique allows for the measurement of the LDOS in all three dimensions and the single emitter character of our probe avoids inhomogeneous broadening from ensemble averaging.

[1] M. Frimmer et al., Phys.Rev.Lett. 107, 123602 (2011).