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Dr. Christoph Lange
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Priv.-Doz. Dr. rer. nat. habil. Christoph Lange

Office PHY 2.1.07
Phone +49 941 943-1800
Fax +49 941 943-4223
e-Mail christoph.langephysik.uni-regensburg.de
Postal address Institut für Experimentelle und Angewandte Physik
Universität Regensburg
Universitätsstraße 31
93053 Regensburg
Germany

Academic career

2018

Habilitation

Since 2012

Assistant and group leader

2009 - 2011

Feodor-Lynen research fellow, Department of Physics, University of Toronto, Toronto
Group of Prof. Dr. Henry van Driel

2009

Postdoctoral fellow, Philipps-Universität Marburg
Group of Prof. Dr. Martin Koch

2006 - 2008

PhD: "Semiconductor nanostructures on silicon: carrier dynamics, optical amplifier and laser"
Faculty of Physics and Materials Sciences Center, Philipps-Universität Marburg
Advisor: Prof. Dr. Wolfgang Rühle

2005 - 2006

Diploma: "Transient absorption spectroscopy of ternary III-V semiconductors and nitrides"
Faculty of Physics and Materials Sciences Center, Philipps-Universität Marburg
Advisor: Prof. Dr. Wolfgang Rühle

2001 - 2005

Studies of physics at the Philipps-Universität Marburg


List of selected publications

  • J. Mornhinweg, M. Halbhuber, C. Ciuti, D. Bougeard, R. Huber, and C. Lange
    Tailored Subcycle Nonlinearities of Ultrastrong Light-Matter Coupling
    Physical Review Letters 126, 177404 (2021)

  • J. Raab, F. P. Mezzapesa, L. Viti, N. Dessmann, L. K. Diebel, L. Li, A. Giles Davies, E. H. Linfield, C. Lange, R. Huber, and M. S. Vitiello
    Ultrafast terahertz saturable absorbers using tailored intersubband polaritons.
    Nature Communications 11, 4290 (2020)

  • M. Halbhuber, J. Mornhinweg, V. Zeller, C. Ciuti, D. Bougeard, R. Huber and C. Lange
    Non-adiabatic stripping of a cavity field from electrons in the deep-strong coupling regime
    Nature Photonics, DOI: 10.1038/s41566-020-0673-2

  • S. Schlauderer, C. Lange, S. Baierl, T. Ebnet, C. P. Schmid, D. C. Valovcin, A. K. Zvezdin, A. V. Kimel, R. V. Mikhaylovskiy, and R. Huber
    Temporal and spectral fingerprints of ultrafast all-coherent spin switching
    Nature 569, 383-387 (2019)

  • J. Raab, C. Lange, J. L. Boland, I. Laepple, M. Furthmeier, E. Dardanis, N. Dessmann, L. Li, E. H. Linfield, A. G. Davies, M. S. Vitiello, and R. Huber
    Ultrafast two-dimensional field spectroscopy of terahertz intersubband saturable absorbers
    Optics Express 27, 2248-2257 (2019)

  • J. Reimann, S. Schlauderer, C. P. Schmid, F. Langer, S. Baierl, K. A. Kokh, O. E. Tereshchenko, A. Kimura, C. Lange, J. Güdde, U. Höfer, and R. Huber
    Subcycle observation of lightwave-driven Dirac currents in a topological surface band
    Nature 562, 396–400 (2018)

  • M. Knorr, P. Steinleitner, J. Raab, I. Gronwald, P. Merkl, C. Lange, and R. Huber
    Ultrabroadband etalon-free detection of infrared transients by van-der-Waals contacted sub-10-µm GaSe detectors
    Optics Express 26, 19059 (2018)

  • C. Lange, E. Cancellieri, D. Panna, D. M. Whittaker, M. Steger, D. W. Snoke, L. N. Pfeiffer, K. W. West and A. Hayat
    Ultrafast control of strong light-matter coupling
    New Journal of Physics 20, 013032 (2018)

  • M. Knorr, J. Raab, M. Tauer, P. Merkl, D. Peller, E. Wittmann, E. Riedle, C. Lange and R. Huber
    Phase-locked multi-terahertz electric fields exceeding 13 MV/cm at 190 kHz repetition rate
    Optics Letters 42, 4367-4370 (2017)

  • A. Bayer, M. Pozimski, S. Schambeck, D. Schuh, R. Huber, D. Bougeard and C. Lange
    Terahertz light-matter interaction beyond unity coupling strength
    Nano Letters 17, 6340-6344 (2017)

  • C. Bäuml, T. Korn, C. Lange, C. Schüller, C. Strunk and N. Paradiso
    Polarized surface-enhanced Raman spectroscopy of suspended carbon nanotubes by Pt-Re nanoantennas
    Physical Review B 96, 035408 (2017)

  • S. Baierl, J. H. Mentink, M. Hohenleutner, L. Braun, T.-M. Do, C. Lange, A. Sell, M. Fiebig, G. Woltersdorf, T. Kampfrath and R. Huber
    Terahertz-Driven Nonlinear Spin Response of Antiferromagnetic Nickel Oxide
    Physical Review Letters 117, 197201 (2016)

  • B. Urbanek, M. Möller, M. Eisele, S. Baierl, D. Kaplan, C. Lange and R. Huber
    Femtosecond terahertz time-domain spectroscopy at 36 kHz scan rate using an acousto-optic delay
    Appl. Phys. Lett. 108, 121101 (2016)

  • Cover story of the March 21, 2016 issue, and Editor's pick.
  • T. Maag, A. Bayer, S. Baierl, M. Hohenleutner, T. Korn, C. Schüller, D. Schuh, D. Bougeard, C. Lange, R. Huber, M. Mootz, J. E. Sipe, S. W. Koch and M. Kira
    Coherent cyclotron motion beyond Kohn's theorem
    Nature Physics 12, 119-123 (2016)

  • S. Zanotto, C. Lange, T. Maag, A. Pitanti, V. Miseikis, C. Coletti, R. Degl'Innocenti, L. Baldacci, R. Huber and A. Tredicucci
    Magneto-optic transmittance modulation observed in a hybrid graphene-split ring resonator terahertz metasurface
    Appl. Phys. Lett. 107, 121104 (2015)

  • N. Paradiso, F. Yaghobian, C. Lange, T. Korn, C. Schüller, R. Huber, and C. Strunk
    Tailored nanoantennas for directional Raman studies of individual carbon nanotubes
    Physical Review B 91, 235449 (2015)

  • C. Lange, T. Maag, M. Hohenleutner, S. Baierl, O. Schubert, E. Edwards, D. Bougeard, G. Woltersdorf, and R. Huber
    Extremely nonperturbative nonlinearities in GaAs driven by atomically strong terahertz fields in gold metamaterials
    Physical Review Letters 113, 227401 (2014)

  • A. Hayat, C. Lange, L. A. Rozema, R. Chang, S. Potnis, H. M. van Driel, A. M. Steinberg, M. Steger, D. W. Snoke, L. N. Pfeiffer, and K. W. West
    Enhanced coherence between condensates formed resonantly at different times
    Optics Express 22, 30559-30570 (2014)

  • C. Drexler, T. V. Shishkanova, C. Lange, S. N. Danilov, D. Weiss, S. D. Ganichev, V. M. Mirsky
    Terahertz split-ring metamaterials as transducers for chemical sensors based on conducting polymers: a feasibility study with sensing of acidic and basic gases using polyaniline chemosensitive layer
    Microchimica Acta 181, 1857 (2014)

  • O. Schubert, M. Hohenleutner, F. Langer, B. Urbanek, C. Lange, U. Huttner, D. Golde, T. Meier, M. Kira, S. W. Koch and R. Huber
    Sub-cycle control of terahertz high-harmonic generation by dynamical Bloch oscillations
    Nature Photonics 8, 119-123 (2014)

  • J. J. Dean, C. Lange, and H. M. van Driel
    Ultrafast surface strain dynamics in MnAs thin films observed with second harmonic generation
    Physical Review B 89, 024102 (2014)

  • A. Hayat, C. Lange, L. A. Rozema, A. Darabi, H. M. van Driel, A. M. Steinberg, B. Nelsen, D. W. Snoke, L. N. Pfeiffer, K. W. West
    Dynamic Stark Effect in Strongly Coupled Microcavity Exciton Polaritons
    Physical Review Letters 109, 033605 (2012)

  • C. Lange, G. Isella, D. Chrastina, F. Pezzoli, N. S. Köster, R. Woscholski, and S. Chatterjee
    Spin band-gap renormalization and hole spin dynamics in Ge/SiGe quantum wells
    Physical Review B 85, 241303(R) (2012)

  • N. Koukourakis, C. Bückers, D. A. Funke, N. C. Gerhardt, S. Liebich, S. Chatterjee, C. Lange, M. Zimprich, K. Volz, W. Stolz, B. Kunert, S. W. Koch, and M. R. Hofmann
    High room-temperature optical gain in Ga(NAsP)/Si heterostructures
    Applied Physics Letters 100, 092107 (2012)

  • E. J. Loren, J. Rioux, C. Lange, J. E. Sipe, H. M. van Driel, and A. L. Smirl
    Hole spin relaxation and intervalley electron scattering in germanium
    Physical Review B 84, 214307 (2011)

  • S. Liebich, M. Zimprich, A. Beyer, C. Lange, D. J. Franzbach, S. Chatterjee, N. Hossain, S. J. Sweeney, K. Volz, B. Kunert, and W. Stolz
    Laser operation of Ga(NAsP) lattice-matched to (001) Silicon substrate
    Applied Physics Letters 99, 071109 (2011)

  • Niko S. Köster, Kolja Kolata, Ronja Woscholski, Christoph Lange, Giovanni Isella, Daniel Chrastina, Hans von Känel, and Sangam Chatterjee
    Giant dynamical Stark shift in germanium quantum wells
    Applied Physics Letters 98, 161103 (2011)

  • C. Lange, M. Schwalm, B. Metzger, and S. Chatterjee
    Carrier-depletion in the stripe-length method: Consequences for gain measurement
    Journal of Applied Physics 108, 103119 (2010)

  • M. Schwalm, C. Lange, W. W. Rühle, W. Stolz, K. Volz, and S. Chatterjee
    Characterization of solar cells by photocurrent spectroscopy and current-voltage characteristics with high spatial resolution
    Optics Express 18, 6277-6287 (2010)

  • C. Lange, N. S. Köster, S. Chatterjee, H. Sigg, D. Chrastina, G. Isella, H. von Känel, B. Kunert, and W. Stolz
    Comparison of ultrafast carrier thermalization in Ge and (GaIn)As quantum wells
    Physical Review B 81, 045320 (2010)

  • C. Lange, N. S. Köster, S. Chatterjee, H. Sigg, D. Chrastina, G. Isella, H. von Känel, M. Schäfer, M. Kira, and S. W. Koch
    Ultrafast nonlinear optical response of photoexcited Ge/SiGe quantum wells: Evidence for a femtosecond transient population inversion
    Physical Review B 79, 201306(R) (2009), selected for the June 2009 issue of Virtual Journal of Ultrafast Science

  • E. Kühn, A. Thränhardt, S.W. Koch, W. Stolz , S. Chatterjee , C. Lange, W.W. Rühle , W. Wohlleben, and M. Motzkus
    Influence of Chirp on the Femtosecond Excitation of a Semiconductor Microcavity Laser
    Applied Physical Letters 92, 011107 (2008)
    selected for the Virtual Journal of Ultrafast Science

  • C. Lange, M. Schwalm, S. Chatterjee, W.W. Rühle, N. Gerhardt, S. Johnson, J. Wang, Y.-H. Zhang
    The Variable Stripe-Length Method Revisited: Improved Analysis
    Applied Physical Letters 91, 191107 (2007)

  • C. Lange, S. Chatterjee, C. Schlichenmaier, A. Thränhardt, S.W. Koch, W.W. Rühle, J. Hader, J. V. Moloney, G. Khitrova, and H. M. Gibbs
    Transient gain spectroscopy of (GaIn)As quantum wells: Experiment and microscopic analysis
    Applied Physical Letters 90, 251102 (2007)

  • S. Chatterjee, W. Wohlleben, C. Lange, W. Stolz, M. Motzkus, and W.W. Rühle
    Optimizing the performance of a vertical-cavity surface-emitting laser
    Applied Physics Letters 89, 151122 (2006), selected for the Virtual Journal of Ultrafast Science

  • J. Vollmer, A.G. Vegh, C. Lange, B. Eckhardt,
    Vortex formation by active agents as a model for Daphnia swarming
    Physical Review E 73, 061924 (2006)


Recent and upcoming invited talks at international conferences

  • C. Lange et al.
    Nonperturbative subcycle nonlinearities of ultrastrong light-matter interaction beyond unity coupling strength
    Keynote lecture at the International Conference on Terahertz Emission, Metamaterials and Nanophotonics, Lecce, Italy (May 27 - 31, 2019)

  • C. Lange, M. Knorr, J. Raab, M. Huber, O. Schubert, F. Langer, and R. Huber
    Pushing the limits of THz time-domain spectroscopy: Atomically strong fields, quantum detection, and rapid-scan technology
    SPIE Photonics West, San Francisco (February 2 - 7, 2019)

  • S. Schlauderer, F. Langer, C. P. Schmid, C. Lange, D. Peller, T. L. Cocker, J. Repp, J. T. Steiner, U. Huttner, P. G. Hawkins, S. W. Koch, M. Kira, and R. Huber
    Subcycle dynamics of terahertz lightwave electronics
    International Workshop Attosecond Physics at the Nanoscale, IBS Center for Theoretical Physics of Complex Systems, Daejeon, South Korea (October 29 - November 2, 2018)

  • C. Lange, A. Bayer, M. Pozimski, S. Schambeck, D. Schuh, R. Huber, and D. Bougeard
    Light-matter coupling beyond unity coupling strength
    SPIE Optics and Photonics, San Diego, California (August 19 - 23, 2018)

  • C. Lange, F. Langer, C. P. Schmid, S. Schlauderer, M. Hohenleutner, O, Schubert, T. Maag, A. Bayer, A. V. Kimel, R. V. Mikhaylovskiy, D. Bougeard, S. W. Koch, M. Kira, and R. Huber
    Nonlinear subcycle THz quantum dynamics of electronic charges and spins
    CLEO Pacific Rim, Hongkong, China (July 29 - August 3, 2018)

  • C. Lange, F. Langer, T. Maag, A. Bayer, M. Mootz, U. Huttner, M. Kira, S. W. Koch, D. Bougeard, and R. Huber
    Non-perturbative THz subcycle nonlinearities: from atomically strong fields to vacuum fields
    OSA Advanced Photonics Congress / Optical Sensors, ETH Zürich (July 2 - July 5, 2018)

  • C. Lange, A. Bayer, M. Pozimski, S. Schambeck, D. Schuh, R. Huber, and D. Bougeard
    Ultrastrong light-matter coupling beyond unity coupling strength
    Advanced Electromagnetics Symposium 2018 (June 24 - July 1, 2018)

  • C. Lange, T. Maag, A. Bayer, M. Hohenleutner, S. Baierl, D. Bougeard, M. Mootz, S.W. Koch, M. Kira, and R. Huber
    Nonlinear quantum control of Landau systems beyond Kohn's theorem
    International Conference on Terahertz Emission, Metamaterials and Nanophotonics (TERAMETANANO-2), Venice, Italy (May 28 - June 2, 2017)

  • C. Lange, T. Maag, A. Bayer, M. Hohenleutner, S. Baierl, D. Bougeard, M. Mootz, S. W. Koch, M. Kira, and R. Huber
    THz coherent quantum control of a two-dimensional Landau system
    Keynote presentation at the 41st International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz2016), Copenhagen (September 26-30, 2016)

  • C. Lange, T. Maag, A. Bayer, O. Schubert, M. Hohenleutner, S. Baierl, D. Bougeard, E. R. J. Edwards, G. Woltersdorf, M. Mootz, M. Kira, S. W. Koch, and R. Huber
    Coherent strong-field THz interaction on the sub-cycle scale
    45-min tutorial talk in focused workshop "Microwave and Photonics Techniques for Terahertz Applications in Science and Technology" International Microwave Symposium (IEEE MTT IMS), San Francisco (May 22 - 27, 2016)

  • C. Lange, T. Maag, A. Bayer, M. Hohenleutner, S. Baierl, D. Bougeard, M. Mootz, M. Kira, S. W. Koch, and R. Huber
    Nonlinear THz quantum dynamics beyond Kohn's theorem
    SPIE Defense and Commercial Sensing, paper no. 9856-9 Baltimore (April 17 - 21, 2016)

  • C. Lange, T. Maag, A. Bayer, M. Hohenleutner, S. Baierl, D. Bougeard, M. Mootz, S. W. Koch, M. Kira, and R. Huber
    Nonperturbative THz Nonlinearities for Many-Body Quantum Control in Semiconductors
    SPIE Photonics West, paper no. 9746-26, San Francisco (February 13 - 18, 2016)

  • C. Lange, O. Schubert, M. Hohenleutner, F. Langer, B. Urbanek, U. Huttner, D. Golde, T. Meier, M. Kira, S. W. Koch, and R. Huber
    Extreme THz nonlinearities: high-harmonic generation, dynamical Bloch oscillations and interband Zener tunneling in bulk semiconductors
    SPIE Defense, Security, and Sensing, (SPIE DSS), paper no. 9483-17, Baltimore (April 20 - 24, 2015)

  • C. Lange, O. Schubert, M. Hohenleutner, F. Langer, T. Maag, S. Baierl, M. Knorr, B. Urbanek, M. Eisele, T. Cocker, M. Plankl, D. Bougeard, E. Edwards, G. Woltersdorf, U. Huttner, D. Golde, T. Meier, M. Kira, S. W. Koch, and R. Huber
    Sub-cycle Electron Dynamics in Atomically Strong THz Fields
    Excelsior workshop at IEMN, Lille (March 3, 2015)

  • C. Lange, O. Schubert, M. Hohenleutner, F. Langer, T. Maag, S. Baierl, U. Huttner, D. Golde, T. Meier, M. Kira, S. W. Koch, and R. Huber
    Sub-cycle control of multi-THz high-harmonic generation and all-coherent charge transport in bulk semiconductors
    SPIE Photonics West, paper no. 9347-13, San Francisco (February 7-12, 2015)

  • C. Lange, O. Schubert, M. Hohenleutner, F. Langer, T. Maag, S. Baierl, B. Urbanek, M. Eisele, T. Cocker, M. Plankl, D. Bougeard, E. Edwards, G. Woltersdorf, U. Huttner, D. Golde, T. Meier, M. Kira, S. W. Koch, and R. Huber
    Phase-locked Multi-THz High-Harmonic Generation by Dynamical Bloch Oscillations in Bulk Semiconductors
    Experimental Solid-State Physics Seminar, Imperial College, London (December 3, 2014)

  • C. Lange, O. Schubert, M. Hohenleutner, F. Langer, B. Urbanek, U. Huttner, D. Golde, T. Meier, M. Kira, S. W. Koch, and R. Huber
    Phase-locked Multi-THz High-Harmonic Generation and All-coherent Charge Transport by Dynamical Bloch Oscillations in Bulk Semiconductors
    Photonics North, paper no. HIGHPOWER.28.16.1, Montreal (May 28 - 30, 2014)

  • C. Lange, N. Köster, H. Sigg, D. Chrastina, G. Isella, B. Kunert, K. Volz, S. Chatterjee, W. Stolz, and W. W. Rühle
    The CMOS-compatible, silicon-based laser: Developing the light source for optical computing
    The Photon Science Institute Seminar, Manchester University, Manchester (May 25, 2011)

  • C. Lange, N. Köster, M. Schäfer, M. Kira, S. W. Koch, D. Chrastina, G. Isella, H. von Känel, H. Sigg, and S. Chatterjee
    Topical Talk: Transient optical gain in germanium quantum wells
    Frühjahrstagung der DPG 2010, Sektion Kondensierte Materie (SKM), Focussed Session: Silicon Photonics, paper no. HL 42.4, Regensburg (March 21 - 26, 2010)