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Keywords:

  • all-optical signal processing;
  • polymethine;
  • aromatic counterions;
  • third-order non-linear optics;
  • silicon-organic hybrid devices
Thumbnail image of graphical abstract

A series of anionic polymethine dyes with different aromatic counterions are prepared to improve their compatibility as guests in an amorphous polycarbonate host. When they are used as the cladding material for silicon hybrid slot waveguides, four-wave mixing wavelength conversion and two-photon absorption-based optical-power modulation are observed. Such guest-host materials may be attractive candidates for all-optical signal-processing applications.