  Controlling opto--mechanical interactions at sub--wavelength levels is of
great importance in academic science and nano--particle manipulation
technologies. This letter focuses on the improvement of the recoil force on
nano--particles placed close to a graphene--dielectric--metal structure. The
momentum conservation involving the non--symmetric excitation of acoustic
surface plasmons (ASPs), via near field circularly polarized dipolar
scattering, % induced by the circular dipole moment on the nano--particle,
implies the occurrence of a huge momentum kick on the nano--particle. Owing to
the high wave--vector values entailed in the near field scattering process, it
has been necessary to consider %apply the non--locality of the graphene
electrical conductivity to explore the influence of the scattering loss on this
large--wave--vector region, which is neglected by the semi--classical model.
Surprisingly, %our results show that %, \textcolor{red}{depending on the
particle position and the dielectric thickness layer}, the contribution of ASPs
to the recoil force %can be is negligibly modified when the non--local effects
are incorporated through the graphene conductivity. On the contrary, our
results show that the contribution of the non--local scattering loss to this
force becomes dominant when the particle is placed very close to the graphene
sheet and that it is mostly independent of the dielectric thickness layer. Our
work can be helpful for designing new and better performing large--plasmon
momentum opto--mechanical structures using scattering highly dependent of the
polarization for moving dielectric nano--particles.
