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, Dr. Christopher Leon, Dr. Alberto Martin Jiménez

Key Publications

Anna Rosławska, Christopher C. Leon, Abhishek Grewal, Pablo Merino, Klaus Kuhnke, and Klaus Kern
Atomic scale dynamics probed by photon correlations
ACS Nano 14, 6366 (2020)


M. Garg and K. Kern
Attosecond coherent manipulation of electrons in tunneling microscopy
Science 367, 411-415 (2020)

Christopher Leon, Anna Rosławska, Abhishek Grewal, Olle Gunnarsson, Klaus Kuhnke, and Klaus Kern 
Photon super-bunching from a generic tunnel junction 
Sci. Adv. 5, eaav4986 (2019) 

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) 

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)

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) 

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