Second-harmonic generation measured on a GaAs photonic crystal planar waveguide

L. C. Andreani, F. Cattaneo, G. Guizzetti, A. M. Malvezzi*, M. Patrini, G. Vecchi, F. Romanato, L. Businaro, Enzo Di Fabrizio, A. Passaseo, M. De Vittorio

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

7 Scopus citations


Second-harmonic (SH) reflection and diffraction measurements are performed, at the wavelengths of a Ti:sapphire laser on a GaAs/AlGaAs photonic crystal waveguide patterned with a square lattice, the basis consisting of rings of air in the dielectric matrix. The measured angles of diffracted SH beams agree with those predicted from nonlinear diffraction conditions. Results for reflected and diffracted SH intensities as a function of incidence angle, polarization, and pump wavelength show that, due to the low air fraction of the photonic crystal, the reflected one is dominated by the crystalline symmetry of GaAs, while the diffracted one is related to the photonic crystal structure. The large diffraction-to-reflection ratio points to the importance of nonlinear diffraction in photonic crystals. Preliminary measurements in the 1500 nm range reveal explicit features related to photonic modes.

Original languageEnglish (US)
Pages (from-to)402-405
Number of pages4
JournalPhysica E: Low-Dimensional Systems and Nanostructures
Issue number1-4
StatePublished - Apr 1 2003
EventProceedings pf the International Conference on Superlattices - ICSNN 2002 - Touluse, France
Duration: Jul 22 2002Jul 26 2002


  • Nonlinear optics
  • Photonic crystals
  • Second-harmonic generation

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics


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