Colloquium

During the recent years, there has been, in the mathematical and physical communities as well, a large interest in the theoretical and practical design of structures and antennas offering new possibilities in the manipulation of acoustic or electromagnetic fields with a wide span of applications. In the first part of this talk I will introduce the ideas behind transformation acoustic/optics for passive acoustic/electromagnetic field manipulations, and discuss our recent analytical and numerical results on the mathematical and physical feasibility of this technique for cloaking. In the second part of the talk, I will describe our novel alternative strategy for active acoustic/electromagnetic field manipulations, and discuss its feasibility, advantages and limitations. Applications of this strategy to sonar or radar cloaking, to the realization of static or moving illusions or to the remote control of targets will be presented as well.