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Controlling the disorder properties of quadratic nonlinear photonic crystals
 

Summary: Controlling the disorder properties of quadratic
nonlinear photonic crystals
Idith Varon,* Gil Porat, and Ady Arie
Department of Physical Electronics, Fleischman Faculty of Engineering,
Tel Aviv University, Tel Aviv 69978, Israel
*Corresponding author: idithf@gmail.com
Received July 5, 2011; accepted September 5, 2011;
posted September 12, 2011 (Doc. ID 150520); published October 5, 2011
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. 2011 Optical Society of America
OCIS codes: 160.1245, 190.0190, 190.2620.
For many years, ordered nonlinear crystals, having either
a homogeneous or periodically modulated second-order
nonlinear coefficient, were considered the ideal medium
for nonlinear optical processes. However, in recent years
it has been shown that disordered nonlinear crystals [1,2]

  

Source: Arie, Ady - Department of Electrical Engineering-Physical Electronics, Tel Aviv University

 

Collections: Engineering