Prof. Alfred Leitenstorfer Profile

Prof. Alfred Leitenstorfer

at Univ Konstanz

SPIE Involvement:

Author

Publications (22)

Proceedings Article | 13 March 2024 Presentation

Controlling intracavity dual-comb soliton motion for programmable pulse pattern generation

Julia Lang, Sarah Hutter, Alfred Leitenstorfer, Georg Herink

Proceedings Volume PC12870, PC1287002 (2024) https://doi.org/10.1117/12.3004428

KEYWORDS: Solitons, Spectroscopy, Harmonic generation, Pulsed laser operation, Modulation, Laser frequency, Femtosecond phenomena

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Proceedings Article | 13 March 2024 Presentation

A new look at spectral fluctuations in single colloidal quantum dots at cryogenic temperatures

Ron Tenne, Frieder Conradt, Vincent Bezold, Volker Wiechert, Steffen Huber, Stefan Mecking, Alfred Leitenstorfer

Proceedings Volume PC12912, PC1291234 (2024) https://doi.org/10.1117/12.3012350

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Proceedings Article | 1 April 2022 Presentation

Soliton molecules in femtosecond fiber lasers: universal coupling mechanism and electronic switching

Georg Herink, Luca Nimmesgern, Cornelius Beckh, Hannes Kempf, Alfred Leitenstorfer

Proceedings Volume PC11986, PC1198605 (2022) https://doi.org/10.1117/12.2614007

KEYWORDS: Solitons, Switching, Molecules, Femtosecond fiber lasers, Molecular lasers, Femtosecond phenomena, Ultrafast laser spectroscopy, Spectroscopy, Materials processing

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Proceedings Article | 20 August 2020 Presentation

70-THz bandwidth from an Au-implanted Ge photoconductive emitter pumped by a mode-locked Er:fibre laser

Abhishek Singh, Alexej Pashkin, Stephan Winnerl, Malte Welsch, Cornelius Beckh, Philipp Sulzer, Alfred Leitenstorfer, Manfred Helm, Harald Schneider

Proceedings Volume 11499, 114990Z (2020) https://doi.org/10.1117/12.2568394

KEYWORDS: Terahertz radiation, Germanium, Systems modeling, Pulsed laser operation, Semiconductors, Absorption, Laser systems engineering, Gold, Antennas, Fiber lasers

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Proceedings Article | 10 September 2019 Presentation

Ultrafast spin dynamics and control in single quantum emitters (Conference Presentation)

Denis Seletskiy, Christian Traum, Alfred Leitenstorfer

Proceedings Volume 11090, 1109011 (2019) https://doi.org/10.1117/12.2531175

KEYWORDS: Ultrafast phenomena, Spin dynamics, Quantum information, Heart, Semiconductors, Quantum dots, Interfaces, Data processing, Femtosecond phenomena

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Proceedings Article | 7 March 2019 Paper

High power frequency comb delivered by a Tm-doped fiber laser

Evgeny Shestaev, Christian Gaida, Tobias Heuermann, Martin Gebhardt, Thomas Butler, Daniel Gerz, Nikolai Lilienfein, Phillipp Sulzer, Marc Fischer, Ronald Holzwarth, Alfred Leitenstorfer, Ioachim Pupeza, Jens Limpert

Proceedings Volume 10897, 108970I (2019) https://doi.org/10.1117/12.2510529

KEYWORDS: Frequency combs, Interferometers, Fiber lasers, Mid-IR, Laser systems engineering, Feedback signals, Fluctuations and noise

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Proceedings Article | 14 March 2018 Presentation

Targeted control and analysis of DNA damage repair in human cells with a multicolor femtosecond fiber laser system (Conference Presentation)

Michael Schmalz, Ines Wieser, Felix Schindler, Martin Stoeckl, Alfred Leitenstorfer, Elisa Ferrando-May

Proceedings Volume 10492, 1049202 (2018) https://doi.org/10.1117/12.2291007

KEYWORDS: Proteins, Ultrafast phenomena, Laser applications, Pulsed laser operation, Control systems, Analytical research, Femtosecond fiber lasers, Laser systems engineering, Femtosecond phenomena, Erbium

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Proceedings Article | 19 April 2017 Presentation

Subcycle quantum physics (Conference Presentation)

Alfred Leitenstorfer

Proceedings Volume 10102, 1010216 (2017) https://doi.org/10.1117/12.2254953

KEYWORDS: Phase shifts, Luminescence, Electro optics, Quantum electrodynamics, Mid-IR, Photons, Nonlinear optics, Quantum physics, Free space, Temporal resolution

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Proceedings Article | 7 March 2014 Paper

Ultrafast spin precession and transport controlled and probed with terahertz radiation

T. Kampfrath, M. Battiato, A. Sell, F. Freimuth, A. Leitenstorfer, M. Wolf, R. Huber, P. Oppeneer, M. Münzenberg

Proceedings Volume 8984, 898415 (2014) https://doi.org/10.1117/12.2039000

KEYWORDS: Terahertz radiation, Magnetism, Iron, Ultrafast phenomena, Gold, Ruthenium, Spintronics, Magnons, Electronics, Ferromagnetics

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Proceedings Article | 21 February 2013 Paper

Ultrafast terahertz spin dynamics: from phonon-induced spin order to coherent magnon control

K. W. Kim, M. Porer, C. Bernhard, J. Demsar, A. Pashkin, T. Kampfrath, A. Sell, M. Wolf, A. Leitenstorfer, R. Huber

Proceedings Volume 8623, 862307 (2013) https://doi.org/10.1117/12.2001236

KEYWORDS: Terahertz radiation, Magnetism, Ultrafast phenomena, Magnons, Picosecond phenomena, Modulation, Phonons, Spin dynamics, Femtosecond phenomena, Superconductivity

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Proceedings Article | 15 May 2012 Paper

Compact and efficient Cr:LiSAF laser pumped by one low-cost single-spatial-mode diode

Umit Demirbas, Stefan Eggert, Alfred Leitenstorfer

Proceedings Volume 8433, 843308 (2012) https://doi.org/10.1117/12.921618

KEYWORDS: Diodes, Semiconductor lasers, Continuous wave operation, Output couplers, Mode locking, Mirrors, Laser applications, Crystals, Laser systems engineering

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Proceedings Article | 15 May 2012 Paper

Femtosecond Cr:Colquiriite lasers pumped by a single tapered diode laser

Umit Demirbas, Michael Schmalz, Bernd Sumpf, Götz Erbert, Gale Petrich, Leslie Kolodziejski, James Fujimoto, Franz Kärtner, Alfred Leitenstorfer

Proceedings Volume 8433, 84330D (2012) https://doi.org/10.1117/12.920539

KEYWORDS: Semiconductor lasers, Diodes, Mode locking, Continuous wave operation, Crystals, Femtosecond phenomena, Output couplers, Thermal effects, Mirrors

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Proceedings Article | 21 February 2012 Paper

Nonlinear response of semiconductors driven by intense THz pulses

A. Pashkin, F. Junginger, C. Schmidt, B. Mayer, O. Schubert, S. Mährlein, R. Huber, A. Leitenstorfer

Proceedings Volume 8260, 82600M (2012) https://doi.org/10.1117/12.910002

KEYWORDS: Terahertz radiation, Semiconductors, Absorption, Spectroscopy, Transient nonlinear optics, Nonlinear response, Four wave mixing, Electro optics, Beam splitters, Nonlinear optics

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Proceedings Article | 22 February 2011 Paper

Multi-THz fields exceeding 100 MV/cm: an ultrabroadband source for sub-cycle nonlinear optics

R. Huber, A. Sell, F. Junginger, O. Schubert, B. Mayer, S. Mährlein, C. Schmidt, T. Kampfrath, M. Wolf, D. Brida, M. Marangoni, G. Cerullo, A. Leitenstorfer

Proceedings Volume 7917, 79170C (2011) https://doi.org/10.1117/12.874588

KEYWORDS: Terahertz radiation, Electro optics, Nonlinear optics, Semiconductors, Transient nonlinear optics, Condensed matter, Excitons, Magnetism, Optical amplifiers, Gases

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Proceedings Article | 11 February 2011 Paper

Coherent anti-Stokes Raman scattering microspectroscopy based on a compact Er:fiber laser

Romedi Selm, Martin Winterhalder, Andrea Nagy, Andreas Zumbusch, Günther Krauss, Tobias Hanke, Alexander Sell, Alfred Leitenstorfer

Proceedings Volume 7903, 79030Y (2011) https://doi.org/10.1117/12.874938

KEYWORDS: Imaging spectroscopy, Light sources, Microscopes, Prisms, CARS tomography, Signal detection, Laser sources, Crystals, Laser scattering, Laser development

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Proceedings Article | 2 March 2010 Paper

Extreme THz nonlinearities in bulk and nanostructured semiconductors

A. Sell, A. Anappara, T. Kampfrath, K. von Volkmann, M. Wolf, J. Steiner, M, Kira, S. Koch, G. Biasiol, L. Sorba, A. Tredicucci, A. Leitenstorfer, R. Huber

Proceedings Volume 7600, 76001S (2010) https://doi.org/10.1117/12.840959

KEYWORDS: Terahertz radiation, Semiconductors, Magnetism, Electro optics, Nonlinear optics, Magnetic semiconductors, Transient nonlinear optics, Polaritons, Optical amplifiers, Crystals

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Proceedings Article | 2 March 2010 Open Access

Femtosecond quantum optics with semiconductor nanostructures: single cycles of light, electrons, and photons

A. Leitenstorfer, R. Huber, R. Bratschitsch

Proceedings Volume 7600, 760002 (2010) https://doi.org/10.1117/12.847159

KEYWORDS: Photons, Picosecond phenomena, Femtosecond phenomena, Terahertz radiation, Electrons, Quantum dots, Quantum optics, Polarization, Excitons, Polaritons

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Recent advances of femtosecond semiconductor physics at the limits of single electrons and photons down to sub-cycle time scales are presented. The first part deals with ultrafast measurements on single-electron systems: The transient quantum dynamics in a single CdSe/ZnSe quantum dot is investigated via femtosecond transmission spectroscopy. A two-color Er:fiber laser with excellent noise performance is key to these first resonant pump-probe measurements on a single-electron system. We have observed ultrafast bleaching of an electronic transition in a single quantum dot due to instantaneous Coulomb renormalization. Since we were also able to invert the two-level system, optical gain due to a single electron has been detected. By using π-pulses for probing, we could deterministically add or remove a single photon to or from a femtosecond light pulse, leading to non-classical states of the light field. In order to optimize electron-photon coupling, nanophotonic concepts like dielectric microresonators and metal optical antennas are explored. In the second part of the paper, we present multi-terahertz measurements on low-energy excitations in semiconductors. These studies lead towards a future time-domain quantum optics on a time scale of single cycles of light: Intense multiterahertz fields of order MV/cm are used to coherently promote optically dark and dense para excitons in Cu₂O from the 1s into the 2p state. The nonlinear field response of the intra-excitonic degrees of freedom is directly monitored in the time domain via ultrabroadband electro-optic sampling. The experimental results are analyzed with a microscopic many-body theory, identifying up to two internal Rabi cycles. Subsequently, intersubband cavity polaritons in a quantum well waveguide structure are optically generated within less than one cycle of light by a femtosecond near-infrared pulse. Mid-infrared probe transients trace the non-adiabatic switch-on of ultrastrong light-matter coupling and the conversion of bare photons into cavity polaritons directly in the time domain.

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Proceedings Article | 15 February 2006 Paper

Femtosecond buildup of phonon-plasmon coupling in photoexcited InP observed by ultrabroadband THz probing

Rupert Huber, Carl Kübler, Stefan Tübel, Alfred Leitenstorfer

Proceedings Volume 6118, 61180I (2006) https://doi.org/10.1117/12.639910

KEYWORDS: Terahertz radiation, Dielectrics, Phonons, Femtosecond phenomena, Plasma, Ultrafast phenomena, Plasmons, Oscillators, Electro optics, Semiconductors

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Proceedings Article | 21 March 2005 Paper

Extending scope and applicability of femtosecond light pulses from erbium-doped fiber lasers

Florian Tauser, A. Zach, Frank Lison, F. Adler, K. Moutzouris, Alfred Leitenstorfer, H. Schnatz, B. Lipphardt

Proceedings Volume 5714, (2005) https://doi.org/10.1117/12.590571

KEYWORDS: Terahertz radiation, Fiber lasers, Femtosecond phenomena, Laser applications, Prisms, Mode locking, Laser sources, Semiconductor lasers, Visible radiation, Oscillators

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Proceedings Article | 30 May 2003 Paper

Ultrafast formation of many-particle interactions in a photoexcited electron-hole plasma

Rupert Huber, Florian Tauser, Andreas Brodschelm, Max Bichler, Gerhard Abstreiter, Alfred Leitenstorfer

Proceedings Volume 4992, (2003) https://doi.org/10.1117/12.473201

KEYWORDS: Terahertz radiation, Plasma, Dielectrics, Gallium arsenide, Plasmons, Ultrafast phenomena, Particles, Femtosecond phenomena, Scattering, Absorption

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Proceedings Article | 24 May 1999 Paper

Quantum kinetic memory effects during electron-phonon interaction in semiconductors

Alfred Leitenstorfer, Gernot Goeger, Markus Betz, Cornelius Fuerst, Alfred Laubereau

Proceedings Volume 3624, (1999) https://doi.org/10.1117/12.349280

KEYWORDS: Phonons, Electrons, Gallium arsenide, Scattering, Semiconductors, Satellites, Polarization, Ultrafast phenomena, Four wave mixing, Gallium nitride

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Proceedings Article | 5 March 1999 Paper

Quantum coherent dynamics of free carriers in semiconductors

Cornelius Fuerst, Alfred Leitenstorfer, Alfred Laubereau

Proceedings Volume 3735, (1999) https://doi.org/10.1117/12.341451

KEYWORDS: Phonons, Semiconductors, Scattering, Polarization, Gallium arsenide, Ultrafast phenomena, Absorption, Femtosecond phenomena, Carrier dynamics, Photon polarization

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Showing 5 of 22 publications

Conference Committee Involvement (1)

Photonics: Design, Technology, and Packaging II

12 December 2005 | Brisbane, Australia

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