Here is a list of our recent publications in peer-reviewed journals

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61. M. A. K. Othman, M.C. Hoffmann, M.K. Kozina, X.J. Wang, R.K. Li and E.A. Nanni , “Parallel-Plate Waveguides for Terahertz-Driven MeV Electron Bunch Compression”, Optics Express (accepted)

60. A. Zhong et al, “Dynamical slowing down in an ultrafast photo-induced phase transition”, Phys. Rev. Lett. (accepted)

59. E Iacocca, et al, “Spin-current-mediated rapid magnon localisation and coalescence after ultrafast optical pumping of ferrimagnetic alloys”, Nature communications 10 (1), 1756 (2019)

58. M. Kozina, et al, “Terahertz-driven phonon upconversion in SrTiO3”, Nature Physics 15, 387–392 (2019)

57. Edbert J. Sie et al, “An ultrafast symmetry switch in a Weyl semimetal,” Nature 565, 61–66 (2019)

56. R. K. Li, M. C. Hoffmann, E. A. Nanni, et al, „Terahertz-based subfemtosecond metrology of relativistic electron beams”, Phys. Rev. Accel. Beams 22, 012803 (2019)

55. A.X. Gray, M.C. Hoffmann, J. Jeong, ; et al. “Ultrafast terahertz field control of electronic and structural interactions in vanadium dioxide”, Phys. Rev. B 98, 045104 (2018)

54. B. K Ofori-Okai, M. C. Hoffmann, A.H. Reid, S. Edstrom, R.K. Jobe, et al, “A terahertz pump mega-electron-volt ultrafast electron diffraction probe apparatus at the SLAC Accelerator Structure Test Area facility”, Journal of Instrumentation 13, P06014 (2018)

53. R. M. Jay, J. Norell, S. Eckert, M. Hantschmann, M. Beye, et al, „Disentangling Transient Charge Density and Metal-Ligand Covalency in Photo-Excited Ferricyanide with Femtosecond Resonant Inelastic Soft X-ray Scattering“, J. Phys. Chem. Lett. 9, 3538 (2018)

52. M.C. Hoffmann et al “Femtosecond profiling of shaped x-ray pulses”, New Journal of Physics 20, 033008 (2018)

51. B. K Russell, B. K Ofori-Okai, Z. Chen, M. C Hoffmann, Y. Y Tsui, S. H Glenzer, “Self-referenced single-shot THz detection”, Optics Express 25, 16140 (2017)

50. S.S. Dhillon, M.S. Vitiello, E.H. Linfield, A.G., Davies, M.C. Hoffmann, J. Booske, et al “The 2017 terahertz science and technology roadmap”, J. Phys. D: Applied Physics 50 (4), 043001 (2017)

49. M. Kozina, T. van Driel, M. Chollet, et al. “Ultrafast X-ray diffraction probe of terahertz field-driven soft mode dynamics in SrTiO3”, Structural Dynamics 4,  054301 (2017)

48. M. Kozina, et al. Local Terahertz Field Enhancement for Time-Resolved X-ray Diffraction. Appl. Phys. Lett. 110, 081106 (2017).

48. G.T. Noe, I. Katayama, F. Katsutani, J.J. Allred, J.A. Horowitz, et al, ““Single-shot terahertz time-domain spectroscopy in pulsed high magnetic fields”, Optics express 24, 30328 (2016)

46. F. Chen, Y. Zhu, S. Liu, Y. Qi, H.Y Hwang, NC Brandt, J Lu, F Quirin, et al“Ultrafast terahertz-field-driven ionic response in ferroelectric”, Physical Review B 94 (18), 180104 (2016)

45. M.P. Jiang, M. Trigo, I. Savić, S. Fahy, É.D. Murray, et al., “The origin of incipient ferroelectricity in lead telluride”, Nature communications 7, 12291, (2016)

44. S. Bonetti, M. C.  Hoffmann, M. -J. Sher, et al. „THz-Driven Ultrafast Spin-Lattice Scattering in Amorphous Metallic Ferromagnets”, Physical Review Letters 117 087205 (2016)

43. T. Henighan, M Trigo, S Bonetti, P Granitzka, D Higley, Z Chen, MP Jiang, “Generation mechanism of terahertz coherent acoustic phonons in Fe”, Phys Rev. B 93, 220301 (2016)

42. D.J. Higley, K. Hirsch, G.L. Dakovski, E. Jal, E. Yuan, T. Liu, A.A. Lutman, et al., „Femtosecond X-ray magnetic circular dichroism absorption spectroscopy at an X-ray free electron laser,” Review of scientific instruments 87, 033110 (2016)

41. J.A Johnson, T Kubacka, MC Hoffmann, C Vicario, S De Jong, P Beaud, “Magnetic order dynamics in optically excited multiferroic”, Phys. Rev. B 92, 184429 (2015)

40. F. Chen, J. Goodfellow, S. Liu, I. Grinberg, M.C. Hoffmann, A.R. Damodaran, et al., “Ultrafast Terahertz Gating of the Polarization and Giant Nonlinear Optical Response in BiFeO3 Thin Films”, Advanced Materials 27, 6371 (2015)

39. T.R.M., Barends, L. Foucar, A. Ardevol, K. Nass, A. Aquila, S. Botha, R.B. Doak, “Direct observation of ultrafast collective motions in CO myoglobin upon ligand dissociation”, Science 350 (6259), 445-450 (2015)

38. GL Dakovski, WS Lee, DG Hawthorn, N Garner, D Bonn, W Hardy, “Enhanced coherent oscillations in the superconducting state of underdoped YBa2Cu3O6+x induced via ultrafast terahertz excitation”, Phys,. Rev. B 91, 220506 (2015)

37. M. P. Minitti et al, “Optical laser systems at the Linac Coherent Light Source”,  J. Synchrotron Rad. (2015). 22, 526 (2015)

36. J.J. Turner, GL Dakovski, MC Hoffmann, HY Hwang, A Zarem, et al., „Combining THz laser excitation with resonant soft X‐ray scattering at the Linac Coherent Light Source”, Journal of synchrotron radiation 22 (3), 621 (2015)

35. AHM Reid, T Rasing, RV Pisarev, HA Dürr, MC Hoffmann, „Terahertz-driven magnetism dynamics in the orthoferrite DyFeO3”, Applied Physics Letters 106 (8), 082403 (2015)

34. S Schulz, I Grguraš, C Behrens, H Bromberger, JT Costello, et al, “Femtosecond all-optical synchronization of an X-ray free-electron laser, Nature communications 6, 5938 (2015)

33. MJ Shu, P Zalden, F Chen, B Weems, I Chatzakis, F Xiong, R Jeyasingh, “MJ Shu, P Zalden, F Chen, B Weems, I Chatzakis, F Xiong, R Jeyasingh, Ultrafast terahertz-induced response of GeSbTe phase-change materials”, Applied Physics Letters 104 (25), 251907 (2014)

32. W. Hu, S. Kaiser, D. Nicoletti, C.R. Hunt, I. Gierz, M. C. Hoffmann, M. Le Tacon, T. Loew, B. Keimer, and A. Cavalleri, “Optically enhanced coherent transport in YBa2Cu3O6.5 by ultrafast redistribution of interlayer coupling”, Nature Materials (2014)

31. T. Kubacka,  J. A. Johnson,  M. C. Hoffmann,  C. Vicario,  S. de Jong,  P. Beaud,  S. Grübel, S.-W. Huang, L. Huber, L. Patthey, Y.-D. Chuang, J. J. Turner, G. L. Dakovski, W.-S. Lee, M. P. Minitti, W. Schlotter, R. G. Moore, C. P. Hauri, S. M. Koohpayeh, V. Scagnoli, G. Ingold, S. L. Johnson, U.Staub, “ Large-Amplitude Spin Dynamics Driven by a THz Pulse in Resonance with an Electromagnon”, Science 343, 1333 (2014)

30. F. Novelli, D. Fausti, F. Giusti,  F. Parmigiani and M.C. Hoffmann, “Mixed regime of light-matter interaction revealed by phase sensitive measurements of the dynamical Franz-Keldysh effect”, Scientific Reports, 3, 1227 (2013)

29. A. Dienst, E. Casandruc, D. Fausti, L. Zhang, M. Eckstein, M. Hoffmann, V. Khanna, N. Dean, M. Gensch, S.Winnerl,W. Seidel, S. Pyon, T. Takayama, H. Takagi and A. Cavalleri,              “Optical excitation of Josephson plasma solitons in a cuprate superconductor”,         Nature Materials, 12, 535 (2013)

28. I. Grguras, A. R. Maier, C. Behrens, T. Mazza, T. J. Kelly, P. Radcliffe, S. Düsterer, A. K. Kazansky, N. M. Kabachnik, Th. Tschentscher, J. T. Costello, M. Meyer, M. C. Hoffmann, H. Schlarb and A. L. Cavalieri, “Ultrafast X-ray pulse characterization at free-electron lasers”, Nature Photonics, 6, 851 (2012)

27. D. Turchinovich,  J. M., Hvam and M.C. Hoffmann, “Self-phase modulation of a single-cycle terahertz pulse by nonlinear free-carrier response in a semiconductor,” Phys. Rev. B 85, 201304(R) (2012)

26. A. D. Caviglia, R. Scherwitzl, P. Popovich, W. Hu, H. Bromberger, R. Singla, M. Mitrano, M. C. Hoffmann, S. Kaiser, P. Zubko, S. Gariglio, J.-M. Triscone, M. Först, and A. Cavalleri, “Ultrafast Strain Engineering in Complex Oxide Heterostructures,” Phys. Rev. Lett. 108, 136801 (2012)

25. M. C. Hoffmann, S. Schulz, S. Wesch, S. Wunderlich, A.Cavalleri, and B. Schmidt, “Coherent single cycle pulses with MV/cm field strengths from a relativistic transition radiation light source,” Opt. Lett. 36 4473-4475 (2011)

24. A. Willner, F. Tavella, M. Yeung, T. Dzelzainis, C. Kamperidis, M. Bakarezos, D. Adams, R. Riedel, M. Schulz, M. C. Hoffmann, W. Hu, J. Rossbach, M. Drescher, V. S. Yakovlev, N. A. Papadogiannis, M. Tatarakis, B. Dromey and M. Zepf, “Efficient control of quantum paths via dual-gas high harmonic generation, “New J. Phys. 13 113001 (2011)

23. A. Willner, F. Tavella, M. Yeung, T. Dzelzainis, C. Kamperidis, M. Bakarezos, D. Adams, M. Schulz, R. Riedel, M. C. Hoffmann, W. Hu, J. Rossbach, M. Drescher, N. A. Papadogiannis, M. Tatarakis, B. Dromey, and M. Zepf, ”Coherent Control of High Harmonic Generation via Dual-Gas Multijet Arrays,”Phys. Rev. Lett. 107, 175002 (2011)

22. J. A. Fülöp,  L. Pálfalvi, M. C. Hoffmann, and J. Hebling, “Towards generation of mJ-level ultrashort THz pulses by optical rectification,” Optics Express 19, 15090 (2011)

21. A. Dienst, M. C. Hoffmann, D. Fausti, J. Petersen, S. Pyon, T. Takayama, H. Takagi, A. Cavalleri, “Ultrafast electric-field gating of quantum transport in a cuprate superconductor,” Nature Photonics, 5, 485-488 (2011)

20. D. Fausti, R.I. Tobey, N. Dean, S. Kaiser, A. Dienst, M. C. Hoffmann, S. Pyon, T. Takayama, H. Takagi and A. Cavalleri, “Inducing Superconductivity in a Stripe-ordered Cuprate by Optical Control of the Lattice,” Science, 331 189-191 (2011)

19. M. C. Hoffmann and J. A. Fülöp, „Intense ultrashort terahertz pulses: Generation and applications,” J. Phys. D 44, 083001 (2011) (Topical Review)

18. M. C. Hoffmann , B. S. Monozon, D. Livshits, E. U. Rafailov, and D. Turchinovich,”Terahertz electro-absorption effect enabling femtosecond all-optical switching in semiconductor quantum dots,” Appl. Phys.  Lett. 97,  231108 (2010)

17. M. C. Hoffmann and D. Turchinovich, “Semiconductor saturable absorbers for ultrafast THz signals,” Appl. Phys. Lett. 96, 151110 (2010)

16. J. Hebling, M.C. Hoffmann, K.-L. Yeh, H. Y. Hwang and K.A. Nelson, “Observation of Non-equilibrium Carrier Distribution in Semiconductors by THz-Pump – THz-Probe Measurements,” Phys. Rev. B 81, 035201 (2010)

15.  M. C. Hoffmann, N. C. Brandt, H. Y. Hwang, K.-L. Yeh, and K. A. Nelson, “Terahertz Kerr Effect,” Appl. Phys. Lett. 95, 231105 (2009), see also News & Views, Nature Photonics 4, 131

14.  M.C. Hoffmann, J. Hebling,  K.-L. Yeh, H. Y. Hwang and K.A. Nelson, “THz-pump–THz-probe spectroscopy of semiconductors at high field strengths (invited),” J. Opt. Soc. Am. B 26, A29–A34 (2009)

13. M. C. Hoffmann, J. Hebling,  K.-L. Yeh, H. Y. Hwang and K.A. Nelson, „Impact ionization in InSb probed by THz-pump THz-probe  spectroscopy”, Phys Rev. B  79 161201(R) (2009)

12.  M. C. Hoffmann , K.-L. Yeh , H. Y. Hwang , T. Sosnowski , B. Prall , J. Hebling , K. A. Nelson “Fiber laser pumped high average power single-cycle THz pulse source”, Appl. Phys. Lett. 93, 141107 (2008)

11.  J. Hebling, K.-L. Yeh, M.C. Hoffmann, and K.A. Nelson “Terahertz death ray”, Joint 31st Int’l Conf. on Infrared Millimeter Waves and 14th Int’l Conf. on Terahertz Electronics, 2007 (IEEE Conf. Proc., IRMMW-THz 2007)  pp. 137 – 139

10.  K.-L. Yeh, J. Hebling, M. C. Hoffmann, and K. A. Nelson, “Generation of high average power 1 kHz shaped THz pulses via optical rectification”, Opt. Comm. 281, 3567-3570 (2008)

9.     J. Hebling, K-L. Yeh, M. C. Hoffmann, and K. A. Nelson, “High Power THz Generation, THz Nonlinear Optics, and THz Nonlinear Spectroscopy,” J.  Sel. Top. Quantum Electron., 14, 345-353 (2008)

8.     J. Hebling, K.-L. Yeh, M. C. Hoffmann, B. Bartal and K. A. Nelson, “Generation of high power THz pulses by tilted pulse front excitation and their application possibilities,” J. Opt. Soc. Amer. B., 25, B6-B19 (2008)

7.     J. Hebling, K.-L. Yeh, M. C. Hoffmann, and K. A. Nelson, “Terahertz polaritonics: High power THz signal generation in ferroelectric crystals,” Integrated Ferroelectrics 92, 87-94 (2007). 

6.     M. C. Hoffmann, K.-L. Yeh, J. Hebling and K. A. Nelson, “Efficient terahertz generation by optical rectification at 1035 nm,” Optics Express 15, 11706-11713, (2007).

5.     K.-L. Yeh, M. C. Hoffmann, J. Hebling and Keith A. Nelson, “Generation of 10 uJ ultrashort terahertz pulses by optical rectification”, Appl. Phys. Lett. 90, 171121, (2007).

4.     B. M. Fischer, M. Hoffmann, H. Helm, P. Uhd Jepsen T. Kleine-Ostmann, F. Rutz, M. Koch, “Micro Array Biochips – Thousands of Reactions on a Small Chip, Section: Terahertz Spectroscopy” Biophotonics: Visions for Better Health Care, Wiley, 2006

3.     B. M. Fischer, M. Hoffmann, H. Helm, R. Wilk, F. Rutz, T. Kleine-Ostmann, M. Koch, P. U. Jepsen, “Terahertz time-domain spectroscopy and imaging of artificial RNA”, Optics Express 13,5205 (2005)

2.     S. Gorenflo, I. Hinkov, A. Lambrecht, B. M. Fischer, M. Hoffmann, H. Helm, P. U. Jepsen, “Terahertz-Time-Domain-Spektroskopie mit einem leistungsoptimierten elektrooptischen Detektionsverfahren” , Technisches Messen 72, 7-8 (2005)

1.     B. Fischer, M. Hoffmann, H. Helm, G. Modjesch, and P. Uhd Jepsen,”Chemical recognition in terahertz time-domain spectroscopy” , Special Issue on Terahertz Technology, Semiconductor Science and Technology 20, S246-S253 (2005)

Conference contributions (invited)

  • Terahertz-Pump Experiments on Complex Solids at X-ray FELs SPIE Optics and Photonics, San Diego 2018 (invited)
  • THz pump/X-ray probe experiments at LCLS, XFEL Workshop on THz, Hamburg, 2017 (invited)
  • Terahertz-driven phonon dynamics probed by ultrafast X-ray pulses, 42nd International Conference on Infrared, Millimeter and Terahertz Waves, Cancun, Mexico 2017 (keynote)
  • Excitation of Coherent Oscillations in Underdoped Cuprate Superconductors by Intense THz Pulses, Ultrafast Bandgap Photonics, San Diego 2016 (invited)
  • Intense THz pulses for condensed matter physics, SPIE Photonics West, San Francisco 2015 (invited)
  • Nonlinear THz optics and control in complex solids, Conference on Lasers and Electro-Optics (CLEO), San Jose 2015 (Tutorial)
  • THz field driven Phase transition in VO2 probed by ultrafast x-ray pulses, TeraNanoV, Fort De France (2014)
  • Controlling superconductivity with strong terahertz fields, CLEO 2012 San Jose (invited)
  • „Inducing and Controlling Superconductivity with Strong THz Fields” Ultrafast Optics, Monterey, 2011 (invited)
  • „Inducing and Controlling Superconductivity with Strong THz Fields” OTST, Santa Barbara, 2011 (invited)

Conference contributions (contributed)



  • „Noncollinear Broadband Terahertz-pump—Terahertz-probe spectroscopy of semiconductors”
    M. C. Hoffmann, V. Khanna, and A. Cavalleri, Ultrafast Phenomena, Snowmass CO, 2010
  • „Terahertz-induced Phase change in thin film Pr0.5Ca0.5MnO3”, M. C. Hoffmann, M. Först, C. Manzoni, Y. Tokura, M. Kawasaki, and A. Cavalleri, GRC Ultrafast Phenomena, Texas 2010
  •  “Terahertz-induced Kerr-effect in Relaxor Ferroelectrics”, M. C. Hoffmann, H. Y Hwang, N. C. Brandt, K.-L. Yeh and K. A. Nelson, MRS Fall Meeting, Boston, 2009 (oral)
  • “Nonlinear Carrier dynamics in Semiconductors probed by THz-Pump/THz-probe spectroscopy”,  H. Y. Hwang, M. C. Hoffmann, J. Hebling, K.-L. Yeh and K. A. Nelson, OTST, Santa Barbara, 2009 (oral)
  • “Impact Ionization in InSb studied by THz-Pump-THz-probe spectroscopy”,
    M. C. Hoffmann, J. Hebling, H. Y. Hwang, K. Yeh and Keith A. Nelson, Ultrafast Phenomena, Italy, 2008 (postdeadline oral)
  • “Fiber laser pumped high average power single-cycle THz pulse source”,
    M. C. Hoffmann, K. Yeh, H. Y. Hwang, T. Sosnowski, J. Hebling, and K. A. Nelson, Ultrafast Phenomena., Italy 2008 (oral)
  • “Generation of Single-Cycle THz Pulses with 5 µJ Energy by Tilted Pulse Front Excitation”, M. Hoffmann, K. Yeh, J. Hebling and K. A. Nelson, CLEO, San Jose, 2007 (oral)
  • “Systematischer Vergleich zwischen THz-TD und FTIR-Spektroskopie”, M. Hoffmann, M. Rumold und H. Helm, DPG Tagung Frankfurt, 2006 (oral)
  • “Schnelle Detektorchips für die THz-TD-Spektroskopie“ Matthias Hoffmann, P.Uhd Jepsen, H. Helm, FMF Kolloquium Titisee, 2005
  • “RNA spot imaging”, M. Hoffmann, B. Fischer, P.U.Jepsen, H. Helm, OTST Orlando, Florida, 2005(oral)
  • “Fasergekoppeltes THz Spektrometer”, M. Hoffmann, B. Fischer, P.U.Jepsen, DPG Tagung Berlin, 2005 (oral)
  • “Fasergekoppeltes THz-Spektrometer”, M. Hoffmann, B. Fischer, P.U.Jepsen, FMF -Kolloquium, 2004
  • “Spectroscoptic Measurements of Biomolecules and Pharmaceuticals in the far infrared”, B. Fischer, M. Walther, M. Hoffmann, P. Jepsen, H. Helm, FHG Terahertz Workshop, 2004


Thesis Work

  • “Novel techniques in THz time domain spectroscopy”, PhD Thesis, Freiburg, 2006
  • “Integration eines RISC-Mikroprozessors zur Überwachung des CATCH”, Diploma Thesis, Freiburg, 2001
  • “Aufbau einer Signalquelle zum Test von schnellen Datenaufnahmesystemen”, Zulassungsarbeit, Freiburg, 2000