  We propose utilizing a polarization-tailored high-power laser pulse to
extract and accelerate electrons from the edge of a solid foil target to
produce isolated attosecond electron bunches. The laser pulse consists of two
orthogonally-polarized components with a time delay comparable to the pulse
duration, such that the polarization in the middle of the pulse rapidly rotates
over 90$^\circ$ within few optical cycles. Three-dimensional (3D)
Particle-in-Cell simulations show that when such a light pulse diffracts at the
edge of a plasma foil, a series of isolated relativistic electron bunches are
emitted into separated azimuthal angles determined by the varying polarization.
In comparison with most other methods that require an ultra-short drive laser,
we show the proposed scheme works well with typical multi-cycle ($\sim 30~$fs)
pulses from high-power laser facilities. The generated electron bunches have
typical durations of a few hundred attoseconds and charges of tens of
picocoulombs.
