D. Wlodarczyk, M. Berkowski, M. Glowacki (Institute of Physics, Polish Academy of Sciences, Poland), S. Kaczmarek (West Pomeranian University of Technology, Szczecin, PL), Z. Kowalski (West Pomeranian University of Technology in Szczecin, PL), M. Brik (Institute of Physics, University of Tartu, Estonia, Institute of Physics, Jan Długosz University, Poland), A. Wittlin, H. Przybylinska, Y. Zhydachevskii (Institute of Physics, Polish Academy of Sciences, Poland), and A. Suchocki (Institute of Physics, Polish Academy of Sciences, Poland, Kazimierz Wielki University, Bydgoszcz, Poland)

S. Takemura and K. Ogasawara (Department of Chemistry, Kwansei Gakuin University)

K. C. Mishra, A. Piquette (OSRAM SYLVANIA), P. C. Schmidt (Universität Darmstadt), and K. H. Johnson (Massachusetts Institute of Technology)