We present an experimental study of the generation of second-harmonic light in a one-dimensional periodic structure truncated by the introduction of a defect in the central period. We observed an enhancement of the nonlinear interaction in the vicinity of the defect when the second-harmonic wave was excited for modes within the forbidden zone or stop band. We also observed an enhancement near the band edge, where the group velocity approaches zero. Second-harmonic generation is completely suppressed for local modes within the forbidden band other than the defect mode.
© 1995 Optical Society of America
Original Manuscript: April 14, 1995
Published: September 1, 1995
J. Trull, Jordi Martorell, R. Corbalán, and R. Vilaseca, "Second-harmonic generation in local modes of a truncated periodic structure," Opt. Lett. 20, 1746-1748 (1995)