  We propose to use ultra-high intensity laser pulses with wavefront rotation
(WFR) to produce short, ultra-intense surface plasma waves (SPW) on grating
targets for electron acceleration. Combining a smart grating design with
optimal WFR conditions identified through simple analytical modeling and
particle-in-cell simulation allows to decrease the SPW duration (down to few
optical cycles) and increase its peak amplitude. In the relativistic regime,
for $I\lambda_0^2=3.4 \times 10^{19}{\rm W/cm^2\mu m^2}$, such SPW are found to
accelerate high-charge (few 10's of pC), high-energy (up to 70 MeV) and
ultra-short (few fs) electron bunches.
