Overview of project A01

Time-Resolved Non-Equilibrium Spectroscopy on Artificial Atoms and Molecules

Geller, Lorke

The mechanisms and principles that govern the relaxation from non-equilibrium to equilibrium are studied in a solid-state environment. Well-defined quantum states of few, interacting electrons in self-assembled quantum dots are prepared and their relaxation dynamics is studied by time-resolved high-resolution optical and transport spectroscopy. Starting with isolated quantum dots and their coupling to an electron reservoir, the measurements are extended to include more complex geometries such as “quantum dot molecules” and the manipulation of the excited states. This will give us a deeper understanding of the equilibration processes and the interactions involved.


Figure Combined optical and transport spectroscopy reveals the charging dynamics with single dot resolution.



Pia Lochner, Annika Kurzmann, Jens Kerski, Philipp Stegmann, Jürgen König, Andreas D. Wieck, Arne Ludwig, Axel Lorke and Martin Paul Geller
Real-time Detection of Single Auger Recombination Events in a Self-Assembled Quantum Dot
Nano Lett. 20, 1631 (2020)
DOI: 10.1021/acs.nanolett.9b04650

Dennis Oing, Martin Paul Geller, Lucas Stahl, Jens Kerski, Axel Lorke and Nicolas Wöhrl
Defect Spectroscopy on the Dielectric Material Aluminum Oxide
Sci. Rep. 10, 12533 (2020)
DOI: 10.1038/s41598-020-69240-3



Amran Al-Ashouri, Annika Kurzmann, Benjamin Merkel, Arne Ludwig, Andreas D. Wieck, Axel Lorke and Martin Paul Geller
Photon Noise Suppression by a Built-in Feedback Loop
Nano Lett. 19, 135 (2019)
DOI: 10.1021/acs.nanolett.8b03486

Pia Lochner, Annika Kurzmann, Rüdiger Schott, Andreas D. Wieck, Arne Ludwig, Axel Lorke and Martin Paul Geller
Contrast of 83% in Reflection Measurements on a Single Quantum Dot
Sci. Rep. 9, 8817 (2019)
DOI: 10.1038/s41598-019-45259-z

Annika Kurzmann, Philipp Stegmann, Jens Kerski, R. Schott, A. Ludwig, A. D. Wieck, Jürgen König, Axel Lorke and Martin Geller
Optical Detection of Single-Electron Tunneling into a Semiconductor Quantum Dot
Phys. Rev. Lett. 122, 247403 (2019)
DOI: 10.1103/PhysRevLett.122.247403

Martin Paul Geller
Nonequilibrium Carrier Dynamics in Self-Assembled Quantum Dots
Appl. Phys. Rev. 6, 031306 (2019)
DOI: 10.1063/1.5091742



Malte F. Linder, Axel Lorke and Ralf Schützhold
Analog Sauter-Schwinger Effect in Semiconductors for Spacetime-Dependent Fields
Phys. Rev. B 97, 035203 (2018)
DOI: 10.1103/PhysRevB.97.035203



Jens Sonntag, Annika Kurzmann, Martin Paul Geller, Friedemann Queisser, Axel Lorke and Ralf Schützhold
Giant Magneto-Photoelectric Effect in Suspended Graphene
New J. Phys. 19, 063028 (2017)
DOI: 10.1088/1367-2630/aa739d

Kevin Eltrudis, Amran Al-Ashouri, Andreas Beckel, Arne Ludwig, Andreas Dirk Wieck, Martin Paul Geller and Axel Lorke
All-Electrical Measurement of the Triplet-Singlet Spin Relaxation Time in Self-Assembled Quantum Dots
Appl. Phys. Lett. 111, 092103 (2017)
DOI: 10.1063/1.4985572

Annika Kurzmann, Benjamin Merkel, Bastian Marquardt, Andreas Beckel, Arne Ludwig, Andreas D. Wieck, Axel Lorke and Martin Paul Geller
Electron Dynamics in Transport and Optical Measurements of Self-Assembled Quantum Dots
phys. stat. sol. (B) 254, 1600625 (2017)
DOI: 10.1002/pssb.201600625

Benjamin Merkel, Annika Kurzmann, Jan Hindrik Schulze, André Strittmatter, Martin Paul Geller and Axel Lorke
Charge-Driven Feedback Loop in the Resonance Fluorescence of a Single Quantum Dot
Phys. Rev. B 95, 115305 (2017)
DOI: 10.1103/PhysRevB.95.115305