title: Controlling the disorder properties of quadratic nonlinear photonic crystals.
abstract: We experimentally demonstrate a modulation scheme for disordered nonlinear crystals that combines periodic modulation and disordered sections. The crystal is divided into a set of identical periodically poled building blocks, whereby each block is followed by a short section of random length. We use this scheme to achieve broadband second harmonic generation in KTiOPO4 nonlinear crystals while independently controlling the bandwidth and the center of the converted wavelengths as well as the efficiency of conversion. The trade-off between bandwidth and efficiency is improved in comparison with periodically poled crystals.
authors: Department of Physical Electronics, Fleischman Faculty of Engineering, Tel Aviv University, Tel Aviv, Israel. idithf@gmail.com
authors: Idith
authors: I
authors: Varon
authors: Gil
authors: G
authors: Porat
authors: Ady
authors: A
authors: Arie