SPIE Proceedings [SPIE Photoconversion: Science and Technologies - Warsaw, Poland (Tuesday 21 October 1997)] Photoconversion: Science and Technologies - <title>Efficient particle trapping using an upward reflected laser beam</title>Jonas, Alexandr; Sramek, Libor; Liska, Miroslav; Zemanek, Pavel; Pluta, Maksymilian; Szyjer, Mariusz · 1998