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Division C: Nonlinear Processes in Condensed Matter
Prof. Dr. T. Elsässer, Humboldt University at Berlin

Head of division C is Prof. Dr. Thomas Elsaesser who is jointly appointed professor at the Humboldt university at Berlin. The study of ultrafast processes in condensed matter and their applications in technology represent the main research area of Division C. Fundamental research is devoted to solids, in particular semiconductors and superconductors, semiconductor nanostructures, molecules in liquids and biomolecules, making use of techniques of ultrafast spectroscopy. Novel lasers for ultrashort pulses, methods for measurements on short time scales and the characterization of optoelectronic devices are subjects of applied research in Division C.

Division C and Division A are jointly responsible for the development and operation of the femtosecond application laboratory.

See also topical seminar of the division C.

Division C is subdivided in three departments:  
Department Department head
  C1 Femtosecond Spectroscopy of Molecular Systems Dr. E. Nibbering
  C2 Solid State Light Sources Dr. G. Steinmeyer
  C3 Femtosecond Spectroscopy of Solids Dr. M. Wörner
The titles of the departments indicate the know-how available in Division C.
In summary the areas of competence are described as follows:
Experimental
  • Spectroscopy of solids and molecular liquids in the sub-50 fs regime
  • Femtosecond nonlinear infrared spectroscopy of solids and molecules including multidimensional techniques
  • Femtosecond x-ray diffraction
  • Steady-state and time-resolved optical near-field spectroscopy
  • Raman spectroscopy of electronically excited molecules in the picosecond regime
  • Generation of femtosecond pulses in diode-pumped solid state and fiber lasers
  • Generation of femtosecond pulses tunable in the wavelength range between 260 nm and 20 µm
  • Generation of extremely short pulses and experimental techniques for the sub-20 fs regime
  • Spontaneous Raman and resonance-Raman spectroscopy of liquids, solids and optoelectronic devices
  • Spectroscopic techniques for studies of aging and strain in laser diodes
Technology
  • Production and characterization of optical near-field probes

 

Theory
  • Calculation of molecular force fields, normal mode analysis
  • Analysis and simulation of wavepacket propagation in molecules
  • Calculations of nonlinear two-dimensional vibrational spectra
In the framework of the research structure of the MBI, scientists of division C participate in the following projects:
click to see details of projects
1.1 Ultrafast Nonlinear Optics G. Steinmeyer, F. Noack
1.2 Ultrafast Laser Physics V. Petrov, U. Griebner
3.1 Dynamics of Condensed Phase Molecular Systems E. Nibbering, O. Kornilov
3.2 Solids and Nano-Structures M. Wörner, J. Tomm
3.3 Transient Structures and Imaging with X-rays M. Wörner, H. Stiel
Close Collaborations also exist  
between    
3.1

and project

 2.3 Time-resolved XUV-science
3.2 and project 3.1 Dynamics of Condensed Phase Molecular Systems
     



T. Elsässer
elsasser@mbi-berlin.de
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