Pulse Dynamics of Flexural Waves in Transformed Plates

Coordinate-transformation-inspired optical devices have been mostly examined in the continuous-wave regime: performance of an invisibility cloak, which has demonstrated for monochromatic excitation, is likely to deteriorate short pulses. Here, pulse dynamics flexural waves propagating transformed plates investigated. A practical realization a waveshifter and rotator based on coordinate transformation method proposed. Time-resolved measurements reveal how deviates from its initial trajectory, with no reflection at bend spatial temporal distortion pulse. Extending strategy cylindrical coordinates, wave designed. It experimentally pulsed plane twisted inside rotator, while wavefront recovered behind shape preserved, extra time delay. The dynamical mirage effect proposed, where obstacle appears oriented deceptive direction.