1. Institut
für Physik und Astronomie, Universität Potsdam, Karl-Liebknecht-Str.
24-25, 14476 Potsdam, Germany
2. Materials
Science and Engineering Division, National Institute of Standards and Technology, 100 Bureau Drive, Gaithersburg, Maryland 20899, United States
3. Institut
für Physik, Humboldt-Universität zu Berlin, Newtonstraße
15, 12489 Berlin, Germany
4. Materials
Science and Engineering, Stanford University, 496 Lomita Mall, Stanford, California 94305-4034, United States
5. Polyera Corporation, 8045 Lamon
Avenue, Suite 140, Skokie, Illinois 60077-5318, United States
6. Department
of Physics, North Carolina State University, 2401 Stinson Drive, Raleigh, North Carolina 27695, United States