Non-Invasive Visualization of Ferroelectric Domain Structures on the Non-Polar y-Surface of KTiOPO4 via Raman Imaging

Crystals

Matteo Santandrea¹  Christof Eigner¹  Laura Padberg¹  Artur Zrenner¹  Christine Silberhorn¹  Julian Brockmeier¹  Gerhard Berth¹  Peter Walter Martin Mackwitz¹  Michael Rüsing² 

[1] Department of Physics, University of Paderborn, Warburger Strasse 100, 33098 Paderborn, Germany;Institute of Applied Physics, Technical University Dresden, Nöthnitzer Straße 61, 01187 Dresden, Germany;

关键词: Raman spectroscopy;    KTP;    periodic poling;    ferroelectric domains;    Raman imaging;   

DOI  :  10.3390/cryst11091086

来源: DOAJ

【 摘 要 】

Potassium titanyl phosphate (KTP) is a nonlinear optical material with applications in high-power frequency conversion or quasi-phase matching in submicron period domain grids. A prerequisite for these applications is a precise control and understanding of the poling mechanisms to enable the fabrication of high-grade domain grids. In contrast to the widely used material lithium niobate, the domain growth in KTP is less studied, because many standard methods, such as selective etching or polarization microscopy, provides less insight or are not applicable on non-polar surfaces, respectively. In this work, we present results of confocal Raman-spectroscopy of the ferroelectric domain structure in KTP. This analytical method allows for the visualization of domain grids of the non-polar KTP y-face and therefore more insight into the domain-growth and -structure in KTP, which can be used for improved domain fabrication.

【 授权许可】

Unknown