Affiliation: | (1) Department of Applied Physics, University of Heidelberg, Albert-Ueberle-Str. 3–5, 69120 Heidelberg, Germany (Fax: +49-6221-549-262, E-mail: frieder.loesel@urz.uni-heidelberg.de), DE;(2) Center for Ultrafast Optical Science, University of Michigan, Ann Arbor, Michigan 48109, USA, US;(3) Max-Born-Institute of Nonlinear Optics and Spectroscopy, 12489 Berlin, Germany, DE;(4) German Cancer Research Center, 69120 Heidelberg, Germany, DE |