Formation of submicron stripe domain ensembles during polarization reversal in Rb doped KTP crystal covered by dielectric layer

Abstract

The formation of self-organized quasi-regular domain structure in Rb:KTP crystals covered by photoresist layer was studied. The instability of domain wall shape resulting in formation of domain streamers on the wall was revealed. The streamers structure appeared on Z+ polar surface and grew in polar direction. The minimal obtained structure period was 1 µm and the structure length reached 50 μm. The width of the stripe domains between the neighboring streamers went down to 100 nm and the resulting aspect ratio was 500. The obtained effect is very promising for the submicron periodical poling in the crystals of KTP family.

Keywords:

• Polarization reversal
• self-organization
• ferroelectric domains
• domain structure
• Rb:KTP
• dielectric layer

Acknowledgments

The equipment of the Ural Center for Shared Use “Modern Nanotechnology” of Ural Federal University was used.

Additional information

Funding

The reported study was funded by President of Russian Federation Grant for young scientists (grant No. MK-1217.2019.2) and by Russian Foundation for Basic Research (grant No. 18-29-20077-mk), and by the Ministry of Science Higher Education of the Russian Federation (state task FEUZ-2020-0054).