Quantum Dynamics

Quantum Dynamics

We are exploring fluctuations of individual nanosystems (single atoms, molecules or clusters at surfaces) locally coupled to an electromagnetic field inside a nanocavity. The scenario is advantageously realized inside the tunnel junction of a scanning tunneling microscope (STM). Electromagnetic pulses can be fed into the tunnel junction from external light sources and local electromagnetic fields can be monitored by external time-resolving single photon detectors. By this complementary experimental approach, we can address atomic scale dynamics spanning 15 orders of magnitude in the time domain from femtoseconds to seconds. The scanning capability of the STM with resolution and stability on the pico-meter scale provides an excellent tool to locally map electronic properties thus addressing the spatial extension of fluctuations far below the optical resolution limit. The method moreover provides a local concentration and enhancement of the electromagnetic field below the sharp STM tip.


Responsible Scientists

Dr. Manish Garg

Dr. Klaus Kuhnke


Team Members

Abhishek Grewal, Lukas Krumbein, Dr. Christopher Leon


Key Publications

Christopher Leon, Anna Rosławska, Abhishek Grewal, Olle Gunnarsson, Klaus Kuhnke, and Klaus Kern 
Photon super-bunching from a generic tunnel junction 
Science Advances, in press, arXiv 1805.10234 (2019) 
Article

P. Merino, A. Rosławska, C.C. Leon, C. Große, C. González, K. Kuhnke, K. Kern 
A single hydrogen molecule as an intensity chopper in an electrically driven plasmonic nanocavity 
Nano Lett.19, 235 (2019) 
Article

A. Rosławska, P. Merino, C. Große, C.C. Leon,  O. Gunnarsson, M. Etzkorn, K. Kuhnke, and K. Kern
Single Charge and Exciton Dynamics Probed by Molecular-Scale-Induced Electroluminnescence
Nano Lett. 18, 4001 (2018)
Article

P. Merino, C. Große, A. Roslawska, K. Kuhnke, and K. Kern 
Exciton dynamics of C60-based single-photon emitters explored by Hanbury Brown-Twiss scanning tunneling microscopy 
Nature Commun. 6, 8461 (2015) 
Article

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