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Q: Fachverband Quantenoptik und Photonik

Q 9: Photonics I

Q 9.4: Talk

Monday, March 18, 2013, 14:45–15:00, A 310

Three dimensional mapping of the local density of states using a single quantum emitter — •Philip Engel, Andreas W. Schell, and Oliver Benson — Nano-Optics, Institute of Physics, Humboldt-Universität zu Berlin, Newtonstraße 15, D-12489 Berlin

Understanding light matter interaction plays an important role in tailoring and engineering complex environments on the nanoscale. A fundamental requirement for this is knowledge of the local density of optical states (LDOS). We present a method which allows to map the LDOS in all three dimensions with sub-nanometer resolution. Due to Fermi's golden rule the LDOS can be directly measured via lifetime changes of an emitter. We use the nitrogen vacancy defect in nanodiamond as point-like probe glued onto the tip of an atomic force microscopy. This gives us the capability to measure the topography, the lifetime, and therefore the LDOS simultaneously.