AG Lorke: PD Dr. Martin Paul Geller

Curriculum Vitae








My research interests are in the area of optical and transport properties of semiconductor nanostructures, including quantum optics and transport measurements of quantum dots in the perspective of future (quantum) devices. Within this area, I am particularly interested in the fundamental processes that limit the applicability of quantum dots and defect states as single photon emitters (such as Auger recombination). Quantum emitters are the fundamental building blocks for combining photons as flying qubits with electrons (spins) as stationary qubits in future quantum information technologies. My expertise ranges from device fabrication (lithography, focused ion beam) to time-resolved electrical transport measurements and optical characterisation and control in photoluminescence and especially high-resolution resonance fluorescence measurements.

Academic training

04/2019 Habilitation in experimental physics, University of Duisburg-Essen
05/2007 PhD in physics (with distinction), TU Berlin
10/2001 - 04/2007 PhD student, Technical University of Berlin, group: Prof. D. Bimberg
07/2001   Master ("Diplom") of physics, TU Berlin
10/1995 - 07/2001 Physics studies, Technical University of Berlin, Germany

Employments and research visits 

Since 10/2015  Senior scientist, "Akademischer Oberrat" (University of Duisburg-Essen)
10/2012 - 09/2015  Senior scientist, "Akademischer Rat" (University of Duisburg-Essen)
10/2011 - 09/2012 Post-Doctoral researcher, group: Prof. Mete Atatüre (University of Cambridge, UK)
10/2009 - 11/2009 Research visit, group Prof. K. Ensslin (ETH Zürich)
01/2008 - 09/2012 Research associate, "Akademischer Rat auf Zeit", group: Prof. Axel Lorke (University of Duisburg-Essen)
04/2007 - 12/2007   Post-Doctoral researcher (TU Berlin)
10/2001 - 04/2007 Research assistant, PhD student (TU Berlin)
04/1998 - 04/2001 Student teaching assistant in an experimental lab course (TU Berlin)

Ongoing third-party funded projects

Since 05/2024 "Deep-level transient specctroscopy of defect characterization in dielectric materials", DFG funded.
Since 02/2022 "Toward universal modelling of quantum measurements, joint project of the Mercator Foundation at the Mercator Research Center Ruhr with the Ruhr University of Bochum, Mercur funded.
Since 07/2016 Sub-project A01 "Time-resolved non-equilibrium spectroscopy of artificial atoms and molecules" in the CRC 1242 "Non-equilibrium dynamics of condensed matter in the time domain", DFG funded.

Project experience

01/2018 - 09/2021 "Auger recombination in self-assembled quantum dots", DFG funded, Applicant.
11/2011- 10/2014 Joint research project "Hochfunktionale Speicher (Hofus)" within BMBF-funded scheme "Validierung des Innovationspotenzials wissenschaftlicher Forschung – VIP"; Co-applicant.
11/2010 - 10/2012 Joint research project within the Mercator Research Center Ruhr: "Revealing the level structure of electron, hole and excition systems in self-organized InAs quantum dots" (Aufschlüsselung der Niveaustruktur von Elektronen-, Löcher- und Exzitonen-Systemen in selbstorganisierten InAs Quantenpunkten); Co-applicant.
09/2010 - 08/2012 Sub-project "Assembly and characterization of graphene-based Lithium-Ion batteries" within the BMBF-funded joint research project "Usage of graphene in energy technologies", Co-applicant of the sub-project.
09/2009 - 02/2013 EU joint research project within the NanoSci-E+ initiative: "Coupling of single quantum dots to two-dimensional systems” (QD2D); Co-applicant and coordinator.
10/2007 - 12/2007   "A non-volatile memory based on quantum dots" (QD-Flash), DFG funded; Responsible Post-doctoral researcher.
07/2003 - 07/2007 EU Network of Excellence: "Self-assembled semiconductor nanostructures for new devices in photonics and electronics" (SANDiE), Coordinator of the "Transport task force".
04/2003 - 10/2004 EU project: "Self-assembled nanostructured materials for electronic and optoelectronic applications" (NANOMAT); Coordinator of the workpackage "Principles of memory and logic devices".

Memberships and more

Teaching award from the Faculty of Medicine at the University of Duisburg-Essen (2023)

Nanowissenschaftspreis, Award from the “Arbeitsgemeinschaft der Nanotechnologie-Kompetenzzentren in Deutschland" (AGeNT-D) 2011

The Carl-Ramsauer Award in physics 2007 (Physikalische Gesellschaft zu Berlin)
Board member of the "Center for Nanointegration Duisburg-Essen" (CeNIDE) (2016-2020)
Member faculty council at the Faculty of Physics at the University of Duisburg-Essen (2010-2012)
DFG Research Fellowship for the research stay at the University of Cambridge, UK (2011/2012)
Editor at Nature Scientfic Reports
Member of the Global Young Faculty (GYF)

Selected publications

Marcel Zöllner, Hendrik Mannel, Fabio Rimek, Britta Maib, Nico Schwarz, Andreas D Wieck, Arne Ludwig, Axel Lorke, Martin Geller, The interplay between electron tunneling and Auger emission in a single quantum emitter weakly coupled to an electron reservoir,

Appl. Phys. Lett. 124, 023102 (2024). DOI: 10.1063/5.0183821

Eric Kleinherbers, Philipp Stegmann, Annika Kurzmann, Martin Geller, Axel Lorke, Jürgen König, Pushing the limits in real-time measurements of quantum dynamics,

Phys. Rev. Lett 128, 087701 (2023). DOI:10.1103/PhysRevLett.128.087701

Pia Lochner, Annika Kurzmann, Jens Kerski, Philipp Stegmann, Jürgen König, Andreas D Wieck, Arne Ludwig, Axel Lorke, Martin 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

Annika Kurzmann, P Stegmann, J Kerski, R Schott, Arne Ludwig, Andreas D Wieck, Jürgen König, Axel Lorke, 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

A Kurzmann, B Merkel, PA Labud, A Ludwig, AD Wieck, A Lorke, M Geller, Optical blocking of electron tunneling into a single self-assembled quantum dot,

Phys. Rev. Lett. 117, 017401 (2016). DOI: 10.1103/PhysRevLett.117.017401

A. Kurzmann, A. Ludwig, A. D. Wieck, A. Lorke, M. Geller, Auger Recombination in Self-Assembled Quantum Dots: Quenching and Broadening of the Charged Exciton Transition,

Nano Lett. 16, 3367 (2016). DOI:10.1021/acs.nanolett.6b01082.

Clemens Matthiesen, Martin Geller, Carsten HH Schulte, Claire Le Gall, Jack Hansom, Zhengyong Li, Maxime Hugues, Edmund Clarke, Mete Atatüre, Phase-locked indistinguishable photons with synthesized waveforms from a solid-state source,

Nature Commun. 4, 1600 (2013). DOI: 10.1038/ncomms2601

B. Marquardt, M. Geller, B. Baxevanis, D. Pfannkuche, A. D. Wieck, D. Reuter, A. Lorke, Transport spectroscopy of non-equilibrium many-particle spin states in self-assembled quantum dots,

Nature Commun. 2, 209 (2011), DOI:10.1038/ncomms1205

More on google scholar: here.

PD Dr. Martin Paul Geller

Universität Duisburg-Essen
Fakultät für Physik
Lotharstr. 1, ME 251
47057 Duisburg

Tel.: +49 (203) 379 2237