Regensburg 2016 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 23: Plasmonics and Nanooptics: Light-Matter Interaction, Spectroscopy
O 23.18: Poster
Montag, 7. März 2016, 18:15–20:30, Poster E
Single Molecule Spectroscopy in a tunable cavity system — •Oliver Schneider1, Ulrich Müller1, and Jens Pflaum1,2 — 1Experimental Physics VI, Julius-Maximilian-Universität, 97074 Würzburg — 2Bavarian Center for Applied Energy Research (ZAE Bayern), 97074 Würzburg
Organic molecules are suitable quantum systems for single photon sources (SPS) as their high exciton binding energies allow for room temperature operation in contrast to inorganic semiconductors [1].
For the implementation of an electrically driven SPS, control of the triplet lifetime is desirable. Drexhage [2] already showed how ensemble lifetimes can be tuned with varying the distance between quantum emitters and a metallic surface. This type of experiment has been advanced for single molecules by using piezo controlled mirrors [3].
Here we report on a novel approach for electrically tuning the molecule-mirror distance by means of an Al-covered support embedded directly within the sample layout. As demonstrated by interferometric measurements, a displacement of about 70 nm, corresponding to about λ/4, is feasible by this arrangement.
Measuring photon statistics on selected single molecules while simultaneously varying the distance to the reflecting Al-interface, we demonstrate the voltage-driven control of radiative lifetimes of individual quantum emitters located within the device.
[1] M. Nothaft et al., Nature Comm. 3, 628 (2012)
[2] K. H. Drexhage, Prog. Opt. 12, 165 (1974)
[3] B. C. Buchler et al., Phys. Rev. Lett. 95, 063003 (2005)