Growth of Ferro-Electric Tungsten Bronze Epitaxial Thin Films for Electro-Optic Device Applications
Abstract
Strontium Barium Biobates:60 doped with Ce and Fe crystals have now been grown with improved optical quality using the Czochralski technique. The liquid phase epitaxial (LPE) growth of SBN:46 on SBN:60 substrate has also been successfully demonstrated, with particularly good results for (100) and (110) film orientations. The recent photorefractive measurements on Ce doped SBN:60 crystals show that the Tungsten Bronze, SBN:60 crystals are superior in many respects to BaTi03 because of enhanced two beam coupling coefficients, sensitivity and the overall flexibility of tungsten bronze crystals. La3+-doped SBN:50 single crystals have also been grown for pyroelectric detector studies and it was found that the growth of doped crystals is possible. Crystals as large as 1 to 1.5 cm in diameter have been grown successfully. Current measurements show that this composition exhibits excellent pyroelectric and dielectric properties to use in longitudinal configuration; hence, work is in progress to use this composition for pyroelectric detector applications. The role of other cations such as calcium and yttrium has also been studied and they appear to be promising for the proposed device applications.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1986
- Accession Number
- ADA170783
Entities
People
- J. R. Oliver
- R. R. Neurgaonkar