Journal article (2007) - A Zen (author), P Pingel (author), T Farell (author), U Scherf (author), R.D. Abellon (author), F.C. Grozema (author), L.D.A. Siebbeles (author), F Jaiser (author), D Neher (author), J. Grenzer (author), W Zhuang (author), JP Rabe (author), A Bilge (author), F Galbrecht (author), BS Nehls (author)