Karl Franzens University Graz | Graz University of Technology | |
Taming waves in theory and experiment I will speak about recent advances in shaping and controlling waves in cavities and random media [1]. In particular, I will show how the experimentally accessible information stored in a system's scattering matrix can be used to create highly collimated wave beams which traverse this system without being diffracted [2,3]. The key tool to realize such particle-like scattering states is the socalled time-delay operator which can be implemented with electromagnetic as well as with acoustic waves. In the second part of my talk I will explain how a suitably designed disorder can be used to control the coherent transmission through waveguides [4] as well as the emission properties of a so-called random laser [5]. |