Browsing by Author "Cai, Chengyuan"

Now showing 1 - 1 of 1
  • No Thumbnail Available
    Item
    Surface Ferron Excitations in Ferroelectrics and Their Directional Routing
    (2023) Zhou, Xi-Han; Cai, Chengyuan; Tang, Ping; Rodriguez-Suarez, R. L.; Rezende, Sergio M. M.; Bauer, Gerrit E. W.; Yu, Tao
    The duality between 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, 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.