Coherence Enhanced Frequency Conversion
Prof. Thomas Halfmann (Universität Kaiserslautern)

Coherent preparation of media by adiabatic passage techniques, e.g. Stimulated Raman Adiabatic Passage (STIRAP) or Stark-chirped rapid adiabatic passage (SCRAP), provides powerful tools to control properties and processes in atomic or molecular media.
Among the applications are the preparation of population inversion or the efficient manipulation of optical (in particular nonlinear optical) properties of matter.
The talk reports on enhancement of frequency conversion processes to yield short-wavelength, extreme-ultraviolet (XUV) radiation by more than one order of magnitude in a medium, coherently prepared by Stark-chirped rapid adiabatic passage (SCRAP). Moreover experiments, dealing with the efficient generation of large-bandwidth Raman sidebands in coherently stimulated media are also discussed.