The Open Crystallography Journal

2012, 5 : 1-7
Published online 2012 February . DOI: 10.2174/1874846501205010001
Publisher ID: TOCRYJ-5-1

Light Scattering in KDP Crystals and Relaxation Oscillations of Diffusion Layer in Crystal Growth from Solutions

Vladimir Bredikhin , Galina Galushkina and Stanislav Kuznetsov
Institute of Applied Physics of the Russian Academy of Sciences, Nizhny Novgorod, Russia.

ABSTRACT

The problem of achieving high optical quality of crystals (KDP monocrystals in particular) grown from solutions under conditions of periodic feeding is considered. The experimental data obtained for rapid profiled growth of KDP crystals have demonstrated a pronounced dependence of crystal quality (light scattering) on feeding parameters: period and duty cycle of feeding, feeder height above the growing surface, and feeding intensity. The theoretical analysis has shown that these effects can be explained within the framework of diffusion layer relaxation at periodic feeding in the diffusion-kinetic regime of crystal growth.

Keywords:

Solution crystal growth, rapid profiled growth, KDP crystal, periodic feeding, diffusion layer.