Stuttgart 2012 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 29: Photonik 2

Q 29.8: Talk

Tuesday, March 13, 2012, 15:45–16:00, V38.01

Scanning near-field microscopy (SNOM) using fluorescent nanodiamonds as a nanoscale light source — •Julia Tisler, Thomas Oeckinghaus, Rainer Stöhr, Roman Kolesov, Rolf Reuter, Friedemann Reinhard, and Jörg Wrachtrup — 3.Physikalisches Institut, Universität Stuttgart, Germany

The nitrogen-vacancy (NV) center in diamond is a color center that is very bright and photostable. This makes it an ideal candidate as a nanoscale light source for scanning near-field optical microscopy (SNOM). With a NV center embedded in a nanodiamond attached to the tip of an atomic force microscope it is possible to perform near-field microscopy beyond the Abbe limit. The dominating near-field interaction between the NV center and the sample is fluorescence resonance energy transfer (FRET). This is a dipole-dipole interaction between two molecules that are very close to each other. In previous experiments we have shown very high transfer efficiencies for single NV centers in nanodiamonds as small as 20 nm in diameter [1]. Here we show the first experiments using such a NV center as a scanning probe. With the method described above we image a graphene sample with a resolution of 20nm. [1] Tisler J. (2011) ACS Nano