Femtosecond pulse shaping by ultrathin plasmonic metasurfaces

In this work, a compact and ultrathin plasmonic metasurface is proposed for an ultrashort pulse shaping method in the optical regime based on linear filtering principles. A planar array of nanoplasmonic particles is employed to manipulate the transmission spectrum of propagating ultrashort pulses to shape its temporal characteristics. We demonstrate that the method is able to broaden, compress, and reshape the polarization of ultrashort pulses with great control over its characteristics by engineering the resonances of the ultrathin plasmonic metasurface