Copper ion point defects in potassium sodium strontium barium niobate crystals

Electrical fixing of waveguide channels in strontium-barium niobate crystals

We demonstrate a new method of electrical fixing of waveguiding channels in strontium-barium niobate. The method is applicable to both bulk material and planar SBN waveguides. Waveguiding is achieved for extraordinarily polarized light. We suggest that the fixing is based on a partial depoling of the crystal rather than on internal electric fields.

Low-loss planar optical waveguides in strontium barium niobate crystals formed by ion-beam implantation.

Planar optical waveguides have been formed in strontium barium niobate single crystals by either proton or heliumion implantation. The profiles of the ordinary and the extraordinary refractive indices are deduced from dark-line mode spectroscopy. Optical barriers with depths to Deltan(e) = 2.6% for protons and Deltan(e) = 5.5% for helium are obtained. By proton implantation we find a very low i...

Structural, dielectric and optical properties of barium strontium sodium niobate (Sr0.7Ba0.3)2NaNb5O15 single crystals

Barium strontium sodium niobate (Sr0.7Ba0.3)2NaNb5O15 (SBNN70) crystals were grown by the Czochralski method. X-ray energy dispersive spectrometry showed that SBNN70 crystals have a stoichiometric composition nearly identical to the starting materials. X-ray diffraction of crushed powder indicated that the SBNN70 crystals are orthorhombic with a = 1.2748 nm, b = 1.1402 nm and c = 0.3898 nm. The...

SBN60, strontium-barium niobate at 100 K

The title compound, Sr0.6Ba0.4Nb2O6 (strontium barium niobium oxide), belongs to the group of strontium-barium niobates with varying composition of Sr and Ba. Their general formula can be written as Sr x Ba1 - x Nb2O6. Below the Curie temperature, T c , these materials indicate ferroelectric properties. The Curie temperature for SBN60 is equal to 346±0.5 K so the structure is in the ferroelectr...

Non-Collinear Second Harmonic Generation in Strontium Barium Niobate