Department of Physics, Engineering Physics & Astronomy

Department of Physics, Engineering Physics & Astronomy
Department of Physics, Engineering Physics & Astronomy

Dynamic Localization in Electronic and Optical Systems

Julius Wan
Department of Physics, Queen's University

Monday, October 21, 2002
1:30 PM @ Stirling A

Abstract:

In recent decades, the study of electrons in a periodic potential in the presence of ac and dc fields has attracted consistent attention. Recently it has been reported that an analog of this system exists in optical waveguide arrays. I will give a brief introduction to basic theory of electron motion in periodic potentials due to ac and dc electric fields. I will present a detailed examination of the general form of pure ac fields (without a dc component) that lead to dynamic localization (DL) of electrons in period potentials. Finally, I will show that the wave equation for light propagation in coupled optical waveguide arrays can be mapped on to the Schrodinger equation with some approximations. Thus we can apply the above results for DL in electronic systems to the coupled optical waveguide systems. According to those ideas, we propose to use periodically spaced, curved optical waveguides as a new type of optical filter.