We study parametric frequency conversion in quadratic nonlinear media with disordered ferroelectric domains.
We demonstrate that disorder allows realizing broadband second- and third-harmonic generation via cascading of two second-order quasi-phase matched nonlinear processes. Application to short-pulse measurements is demonstrated.
Roppo, V., Wang, W., Kalinowski , K., Vilaseca, R., Trull, J., Cojocaru, C., Staliunas, K., Krolikowski, W., Kivshar, Y. Second and third harmonic generation in disordered quadratic nonlinear media: application to short-pulse characterization. A: International Conference on Transparent Optical Networks. "Proceedings of 12th International Conference on Transparent Optical Networks". Munich: 2010, p. 1-4.