  The duality between the electric and magnetic dipoles inspires recent
comparisons between ferronics and magnonics. Here we predict surface
polarization waves or ``ferrons" in ferroelectric insulators, taking the
long-range dipolar interaction into account. We predict properties that are
strikingly different from the magnetic counterpart, \textit{i.e.} the surface
``Damon-Eshbach" magnons in ferromagnets. The dipolar interaction pushes the
ferron branch with locked circular polarization and momentum to the ionic
plasma frequency. The low-frequency modes are on the other hand in-plane
polarized normal to their wave vectors. The strong anisotropy of the lower
branch renders directional emissions of electric polarization and chiral near
fields when activated by a focused laser beam, allowing optical routing in
ferroelectric devices.
