Bessel Beams belong to a class of wave known as the Localized Wave, which can resist diffraction and exhibit self-healing behavior upon scattering from objects. In this talk, I will show that in addition to the aforementioned known properties, it is possible to control and modify (i.e. engineer), almost at will, the Bessel Beam’s intensity (value and pattern), its orbital angular momentum (magnitude and sign), its polarization (horizontal, vertical, or radial), and/or its wavelength along the beam’s axis of propagation. Such an unprecedented control can be performed for a single parameter of the beam (e.g. intensity, orbital angular momentum, polarization, and wavelength) or for a combination of these parameters. Time permitting; some application of this novel approach will be also discussed.
Professor Mojahedi is a full professor at the Department of Electrical and Computer Engineering at the University of Toronto (UofT). He received his Ph.D. from the University of New Mexico (UNM) in 1999. For his Ph.D. work he received the Popejoy award which is the highest honour given every three years to the most outstanding Ph.D. dissertation across Engineering, Physics, and Chemistry at UNM. Immediately after his graduation, he accepted a position as a Research Assistant Professor at the Center for High Technology Materials (CHTM-UNM) and worked in collaboration with the Department of Physics at the University of California at Berkeley. He was the Director of the Emerging Communications Technology Institute (ECTI), a multi-disciplinary Open Research Facility at the University of Toronto, from 2007-2010. He is a Fellow of Optical Society and has been acknowledged by the UofT President Naylor and Dean Amon for his distinguished and exemplary service provided to the University. He has served in multiple National Science Foundation (NSF) Review Panels and as the Technical Program Chair and Member for multiple internationally recognized conferences. He has authored over 170 scientific publications in some of the most prestigious journals and conferences. His research interests span a wide range of topics such as optical and plasmonic sensors, nanophotonics and plasmonics, structured light, meta-materials, dispersion engineering, quantum confined structures, and fundamental electromagnetic theory.