Projekt

This project will consist of (i) the development of the multilayered ferromagnetic structures where coupling of magnetization and strain does not rely on the intrinsic magneto-elastic effect, and (ii) the elaboration and testing of the method for excitation of the spin waves travelling along the planar ferromagnetic structure. This will allow to create ferromagnetic structures with ultrafast strain control based on a much wider spectrum of ferromagnetic materials and to check transport parameters of spin waves at nanoscale level and related feasibility of spin-wave circuits. Nonequilibrium cavity-polariton condensates demonstrate multistability under resonant and coherent optical excitation, so that condensate states can have different intensities and average spins under fixed external conditions. It is known that strain modifies the polariton resonance energy and thus it supposedly acts to toggle (in)stability of particular macroscopic spin states. Hence, application of a strain pulse is expected to induce dynamical switching of the condensate spin. It is planned to explore feasibility of this concept experimentally using microcavities and strain pulses of various parameters and develop the theoretical approach to quantitatively describe the mechanisms of ultrafast strain-pulse control of the polariton condensate spin. This will allow, in particular, to create tunable coherent light sources whose polarization can be changed between linear, light- and left-circular on the scale of picoseconds.

• Prof. Dr. Dmitri Yakovlev

  Technische Universität Dortmund
  Fakultät Physik
  Lehrstuhl Experimentelle Physik 2
  Dortmund
  

• Dr. Boris Glavin

  National Academy of Sciences of Ukraine
  V.E. Lashkaryov Institute of
  Semiconductor Physics
  Department of Theoretical Physics
  Kiev
  Ukraine
  

• Dr. Alexey Scherbakov

  Russian Academy of Sciences
  Institute of Solid State Physics
  Laboratory of Physics of Ferroics
  St. Petersburg
  Russland
  

• Prof. Dr. Vladimir Kulakovskii

  Russian Academy of Sciences
  Institute of Solid State Physics
  Chernogolovka
  Russland
  

• Prof. Dr. Anatoli Pogorily

  National Academy of Sciences of Ukraine
  Department of Physics of Thin Films
  Institute of Magnetism
  03142
  Kyiv
  Ukraine