Momentum, Angular Momentum and Twist of Light

Date: 20 Feb 2006 - 20 Feb 2006

Venue: Auditorium, Tower Block, SIMTech, 71 Nanyang Drive


This lecture will give an introduction to specific parameters of light with a brief review of experiments, demonstration of momentum of light and some recent applications. The angular momentum, first measured by Beth in 1936, has triggered interest some years ago because it was shown that light can have intrinsic and orbital angular momentum called twist. The different nature of these two types of angular momentum will be explained and the generation of twisted laser beams will be discussed. One of the applications of twisted beams is the manipulation (rotation) of small particles.

About the Speaker

Professor Horst Weber, a distinguished and internationally well-known expert in laser technology and a pioneer in high power solid-state lasers, is scheduled to visit SIMTech for a short period. He is currently an Emeritus Professor of Technical University of Berlin (TUB). He became full professor in 1976 at the University of Kaiserslautern where he stayed for 12 years. Professor Weber returned to Berlin in 1988 to work with the Optical Institute of the Technical University on the development of kW-slid state lasers, diode pumped lasers, material processing, beam characterisation, optical tomography and coherence. He received numerous honorary titles and awards for his achievements. He was General Manager of Optical Institute TUB, Managing Director of Festkörper-Laser, Institute Berlin GmbH (1987-1995) and Managing Director of Laser and Medizin Technologies GmbH, Berlin (1995-2000). He is author/co-author of more than 200 scientific publications. In addition, Professor H Weber is an advisory board member of the Laser Congress and Exhibition Munich, Chairman of Scientific Association of Laser Technology, and State advisory board member of the State Key Laser Technology Laboratory (Huazhong University of Science & Technology).

He was editor of journals and handbooks on laser applications (Landolt-Boernstein, Lasers and Laser Applications, 3 Volumes, Springer 2005/2006) and member of several scientific organisations (DPG, EPS, SGOEM, OptecBB, WLT). He was Chairman of the Berlin-Brandenbrug Laser Association from 1990 to 2004. Professor Weber has a small group now working on coherence and diode pumped lasers.

Who Should Attend

Industry professionals, managers, engineers from the precision engineering, microelectronics and semiconductor clusters as well as researchers, students and academic staff members.

Admission is free. All are welcome. Seats are available on a first come first served basis. Pre-registration for the lecture is necessary. Please include your name, designation, company name, contact number in your email registration to : by 18 February 2006.