1. Institute of Physics; Polish Academy of Sciences; Al. Lotnikow 32/46 02-668 Warsaw Poland
2. Institute of Electronics Technology; Al. Lotnikow 32/46 02-668 Warsaw Poland
3. Institute of Electronic Materials Technology; 133 Wolczynska Str 01-919 Warsaw Poland
4. Physics Dept. and Materials Science Dept.; Rutgers Univ.; Piscataway NJ 08854 USA