Overview of project A03

Non-Equilibrium Dynamics of Nanoscopic Objects for Competing Processes

Bobisch, Möller

We analyze the non-equilibrium dynamics of metastable charge states and excited states by means of pump-probe experiments with a scanning tunneling microscope (STM). Thereby, the charge carrier dynamics and the luminescence of single atoms, molecules and small clusters shall be analyzed as a function of the local environment. Two experimental strategies will be applied. To obtain time resolution down to 1 ns, all electronic pump-probe measurements are performed. In parallel we will develop and build an experiment in which THz radiation is coupled into the STM to allow for pump-probe experiments in the ps range.

principle of the time-resolved analysis of the scanning tunneling microscope



Anahita Kavangary, Paul Graf, Hüseyin Azazoglu, Meike Flebbe, Kornelia Huba, Hermann Nienhaus and Rolf Möller
Temperature Dependent Electrical Characteristics of a Junction Field Effect Transistor for Cryogenic Sub-Attoampere Charge Detection
AIP Adv. 9, 025104 (2019)
DOI: 10.1063/1.5077039

Erdem Genc, Andre Mölleken, Doris Tarasevitch, Detlef Utzat, Hermann Nienhaus and Rolf Möller
Three Dimensional Tracing of a Charged Particle by Electrostatic Detection
Rev. Sci. Instrum. 90, 075115 (2019)
DOI: 10.1063/1.5093988



Paul Graf, Meike Flebbe, Stephanie Hoepken, Detlef Utzat, Hermann Nienhaus and Rolf Möller
Scanning Probe Microscopy and Potentiometry Using a Junction Field Effect Transistor Based Sensor
Appl. Phys. Lett. 113, 223101 (2018)
DOI: 10.1063/1.5054349



Paul Graf, Meike Flebbe, Detlef Utzat, Hermann Nienhaus and Rolf Möller
Electrometer with Sub-Attoampere Current Load
Rev. Sci. Instrum. 88, 084702 (2017)
DOI: 10.1063/1.4998979

Ebru Ekici, Philip Kapitza, Christian A. Bobisch and Rolf Möller
Electron-Induced Photon Emission above the Quantum Cutoff Due to Time-Energy Uncertainty
Opt. Lett. 42, 4585 (2017)
DOI: 10.1364/OL.42.004585