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Active-matrix-addressed spatial light modulators based on the longitudinal Pockels effect in oblique-cut perovskites

: Yilmaz, S.; Gerhard-Multhaupt, R.

Ferroelectrics 94 (1989), pp.103-109
ISSN: 0015-0193
ISSN: 1563-5112
European Conference on Applications of Polar Dielectrics (ECAPD) <1, 1988, Zürich>
International Symposium on Applications of Ferroelectrics (ISAF) <1, 1988, Zürich>
Conference Paper, Journal Article
Fraunhofer HHI ()
barium compounds; electro-optical devices; optical modulation; pockels effect; potassium compounds; strontium compounds; tetragonal phase; active-matrix-addressed modulators; spatial light modulators; longitudinal pockels effect; oblique-cut perovskites; control layers; electro-optic effect; optimal oblique-cut angle; optical system; srxba1-xnb2o6; batio3; kta1-xnbxo3

Oblique-cut layers from the perovskite crystals potassium tantalate niobate and barium titanate and from the tungsten-bronze crystal strontium barium niobate are suggested as control layers for active-matrix-addressed electro-optic spatial light modulators. Since all these materials consist of oxygen octahedra as building blocks and since they all exhibit their highest electro-optic effect in the tetragonal (4 mm) phase, a common theoretical treatment is used to determine the optimal oblique-cut angle. Preliminary experimental results on oblique-cut crystals are presented and a compact and efficient optical system for their use is proposed.