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O: Fachverband Oberflächenphysik

O 57: Plasmonics and Nanooptics II

O 57.5: Vortrag

Mittwoch, 2. April 2014, 17:00–17:15, GER 38

Probing the Local Density of States in Nano-Photonic Systems: a Numerical Discussion — •Julia F. M. Werra¹, Andreas W. Schell², Philip Engel², Christian Wolff³, Oliver Benson², and Kurt Busch^1,3 — ¹Humboldt-Universität zu Berlin, Institut für Physik, AG Theoretische Optik & Photonik, D-12489 Berlin, Germany — ²Humboldt-Universität zu Berlin, Institut für Physik, AG Nanooptik, D-12489 Berlin, Germany — ³Max-Born-Institut, D-12489 Berlin, Germany

The photonic local density of states (LDOS) of a nano-photonic system quantifies the position dependent coupling between a point emitter and the electromagnetic modes. Thus, it is the key characteristic of such systems in the context of radiation dynamics; especially in the realm of plasmonics with its strong and highly confined field enhancements and in the nano-scale regime.

In this talk, we will present theoretical and numerical foundations to quantitatively calculate the LDOS of an arbitrary geometry within the discontinuous Galerkin time-domain method. As an example, we will focus on nitrogen-vacancy centers taking especially its specific energy level scheme into account and compare our computations to experimental data. This facilitates a detailed quantitative interpretation and understanding of quantum-emitter based fluorescence life-time imaging (see Ref. [1]).