Highly efficient broadband second harmonic generation using polydomain epitaxial barium titanate thin film waveguides Academic Article uri icon


  • Broad band second harmonic generation (SHG) over the spectral range of 530-700 nm is reported using an epitaxial barium titanate (BaTiO3) thin film waveguide. The epitaxial layers are multidomain consisting of both a and c domain variants. The SHG conversion efficiency is nearly independent of wavelength over the visible spectra range. An enhanced broadband conversion efficiency was observed that is attributed to random quasi-phase matching in the polydomain epitaxial layers. In contrast to theory of SHG for disordered nonlinear media, the observed SHG shows a quadratic dependence on pump power. 2008 American Institute of Physics.

published proceedings

  • Applied Physics Letters

author list (cited authors)

  • Lin, P. T., Wessels, B. W., Jang, J. I., & Ketterson, J. B.

complete list of authors

  • Lin, Pao Tai||Wessels, BW||Jang, Joon I||Ketterson, JB

publication date

  • January 1, 2008 11:11 AM