  We show that chirped metal-dielectric waveguide arrays with focusing cubic
nonlinearity can support plasmonic lattice solitons that undergo
self-deflection in the transverse plane. Such lattice solitons are
deeply-subwavelength self-sustained excitations, although they cover several
periods of the array. Upon propagation,the excitations accelerate in the
transverse plane and follow trajectories curved in the direction in which the
separation between neighboring metallic layers decreases, a phenomenon that
yields considerable deflection angles. The deflection angle can be controlled
by varying the array chirp. We also reveal the existence of surface modes at
the boundary of truncated plasmonic chirped arraythat form even in the absence
of nonlinearity.
