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Keywords:

  • azobenzene;
  • ferroelectric liquid crystal;
  • second-harmonic generation;
  • photoswitching;
  • two-photon
Thumbnail image of graphical abstract

A conceptually novel materials design, based on crosslinked ferroelectric liquid-crystalline polymers, is demonstrated for efficient switching of a second-order nonlinear optical (NLO) response in the solid state. By controlling the molecular alignment of the NLO moieties through two-photon isomerization of azobenzene molecules, reversible isothermal photocontrol of second-harmonic generation is achieved with contrast of up to 20.