Stuttgart 2012 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 54: Poster 3
Q 54.51: Poster
Donnerstag, 15. März 2012, 16:30–19:00, Poster.I+II
Controlling the radiative properties of molecules in a microresonator — •Andreas M. Kern1, Alexey Chizhik2, and Alfred J. Meixner1 — 1Institut für Physikalische und Theoretische Chemie, Universität Tübingen — 2Drittes Physikalisches Institut, Universität Göttingen
The enhancement of light in an optical resonator leads to stronger absorption by a molecule located therein. This, however, has been shown to be only one of two effects on the light-molecule interaction. The increased density of optical states also leads to a shorter radiative lifetime and thus enhanced emission. Here, we present our work on the control of the optical properties of single molecules in optical microresonators formed by two silver mirrors placed only half a wavelength apart. Using higher-order laser modes as illumination, the geometric orientation of the molecules can be probed and proves to have a large effect on the coupling of the molecule to the resonator modes. Influencing the photonic landscape around the molecule, one also gains insight into the nonradiative, lossy processes and thus the system's quantum yield. Using pulsed excitation, we obtain additional information on the dynamics of an emitter's decay path. This versatile measurement approach allows the detailed study of fluorescence, luminescence and FRET processes.