New publication: "Local disorder at the phase transition interrupts ambipolar charge carrier transport in large crystal methylammonium lead iodide thin films" by Alexander Biewald, Nadja Giesbrecht, Thomas Bein, Pablo Docampo, Achin Hartschuh and Richard Ciesielski

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New publication: "Non-linear Raman scattering intensities in graphene ", by Veit Giegold, Lucas Lange, Richard Ciesielski and Achim Hartschuh

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New publication: "Controling photon antibunching from 1D emitters using optical antennas", Lucas Lange, Frank Schäfer, Alexander Biewald, Richard Ciesielski and Achim Hartschuh

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New Publication: "Uniaxial transition dipole moments in semiconductor quantum rings caused by broken rotational symmetry", Nicolai F. Hartmann, Matthew Otten, Igor Fedin, Dmitri Talapin, Moritz Cygorek, Pawel Hawrylak, Marek Korkusinski, Stephen Gray, Achim Hartschuh and Xuedan Ma

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Universitaet Muenchen
Department Chemie
Butenandtstr. 5-11 (Haus E, Gerhard-Ertl-Gebaeude)
81377 Muenchen

Phone: +49 89 2180 77515
Mail: Prof. A. Hartschuh
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Time-resolved spectroscopy

Optical excitation of Single-Walled Carbon Nanotubes generates excitons. Exciton decay dynamics are of major importance both for our understanding of the fundamental physics and for all light-based device applications of these 1D quantum systems.

To avoid the major disadvantages of ensemble measurements, namely overlapping contributions from different tube species and averaging over tubes of the same species but with different individual properties (e.g. defect concentration), single nanotube experiments are required.

Setup for time-resolved photoluminescence spectroscopy


Time-dependent photoluminescence intensity for three different
nanotubes showing the decay dynamics of the excited state. The
corresponding lifetimes are derived from fitting with a mono-exponential
decay function.