Proposal for ultrafast switching of ferroelectrics using midinfrared pulses

  title={Proposal for ultrafast switching of ferroelectrics using midinfrared pulses},
  author={Alaska Subedi},
  journal={Physical Review B},
  • A. Subedi
  • Published 31 October 2015
  • Physics
  • Physical Review B
I propose a method for ultrafast switching of ferroelectric polarization using mid-infrared pulses. This involves selectively exciting the highest frequency $A_1$ phonon mode of a ferroelectric material with an intense mid-infrared pulse. Large amplitude oscillations of this mode provides a unidirectional force to the lattice such that it displaces along the lowest frequency $A_1$ phonon mode coordinate because of a nonlinear coupling of the type $g Q_{\textrm{P}} Q_{\textrm{IR}}^2$ between the… 

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