Publications
Recent publications (2005-2006):
  1. M. Swoboda, R. Gehlhaar, M. Sudzius, M. Hoffmann, H. Fröb, V. G. Lyssenko, K. Leo,
    Terahertz Beating of Laser Emission from an Organic Microcavity ,
    Appl. Phys. Lett. 89 (2006), 121110.

  2. M. Swoboda, R. Gehlhaar, M. Sudzius, V. G. Lyssenko, M. Hoffmann, K. Leo,
    THz Oscillations from Organic Microcavity Laser Emission ,
    Proc. SPIE 6192 (2006), 61920F.

  3. E. Engel, K. Schmidt, D. Beljonne, J.-L. Brédas, J. Assa, H. Fröb, K. Leo, M. Hoffmann,
    Transient absorption spectroscopy and quantum-chemical studies of matrix-isolated perylene-derivatives ,
    Phys. Rev. B 73 (2006), 245216.

  4. E. Engel, K. Leo, M. Hoffmann,
    Ultrafast Relaxation and Exciton-Exciton Annihilation in PTCDA Thin Films at High Excitation Densities ,
    Chem. Phys. 325 (2006), 170.

  5. R. Gehlhaar, M. Swoboda, M. Sudzius, M. Hoffmann, H. Fröb, V. G. Lyssenko, K. Leo,
    Polarization splitting and terahertz oscillations from a single planar Fabry-Perot microcavity ,
    Appl. Phys. Lett. 88 (2006), 091121.

  6. M. Koschorreck, R. Gehlhaar, V. G. Lyssenko, M. Swoboda, M. Hoffmann, K. Leo,
    Dynamics of a High-Q Vertical-Cavity Organic Laser ,
    Appl. Phys. Lett. 87 (2005), 181108.

  7. E. Engel, M. Koschorreck, K. Leo, M. Hoffmann,
    Ultrafast Relaxation in Quasi-One-Dimensional Organic Molecular Crystals ,
    Phys. Rev. Lett. 95 (2005), 157403.

  8. E. Engel, M. Koschorreck, K. Leo, M. Hoffmann,
    Excitonic Intraband Relaxation and Polarization Anisotropies in PTCDA on Femtosecond and Picosecond Timescales ,
    J. Lum. 112 (2005), 299.

Selected older publications (before 2005)
  1. R. Schüppel, T. Dienel, K. Leo, and M. Hoffmann,
    Time-Resolved Luminescence Quenching in Thin Films of Perylene-Tetracarboxylic-Dianhydride ,
    J. Lum. 110 (2004), 309.

  2. M. Hoffmann,
    Mixing of Frenkel and Charge-Transfer Excitons and Their Quantum Confinement in Thin Films ,
    in V. M. Agranovich and G. F. Bassani, Electronic Excitations in Organic Multilayers and Organic Based Heterostructures (Volume 31 of Thin Films and Nanostructures), pp. 221-292, Elsevier, Amsterdam, 2003.

  3. M. Hoffmann, Z.G. Soos, and K. Leo,
    Absorption spectra and band structure of mixed Frenkel-charge-transfer vibronic states in one-dimensional molecular crystals ,
    Nonlinear Optics 29 (2002) 227.

  4. M. Hoffmann, Z.G. Soos,
    Optical absorption spectra of the Holstein molecular crystal for weak and intermediate electronic coupling ,
    Phys. Rev. B 66 (2002) 024305.

  5. M. Hoffmann, K. Schmidt, T. Fritz, T. Hasche, V.M. Agranovich, K. Leo,
    The lowest energy Frenkel and charge-transfer excitons in quasi-one-dimensional structures: application to MePTCDI and PTCDA crystals ,
    Chem.Phys. 258, 1 (2000) 73.

  6. V.M.Agranovich, K. Schmidt, K. Leo,
    Surface states in molecular chains with stong mixing of Frenkel and charge-transfer excitons ,
    Chem.Phys.Lett. 325 (2000) 308.

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