Etude des propriétés électro-optiques de matériaux ferroélectriques (KDP,BaTi- O3,PbTiO3), en fonction de la température et de la fréquence de modulation

Abstract : The topic of the thesis belongs to the optoelectronics area where electro-optic devices are useful (modulators, deflectors,...). It consists of a study of electro-optical properties of ferroelectric materials, KDP,BaTi- O3, and PbTiO3. These properties are investigated as a function of temperature, DC applied field, and AC modulating frequency, by means of an accurate method based upon amplitude modulation of a laser beam at the frequency doubling position, with a Sénarmont modulator. First this allows the determination of thermo-optic contributions which are often superimposed on the "true" electro-optic effect. On the other hand, the results leads to a better understanding of the physical mechanism responsible for the electro-optic properties and their dependences on various parameters. This is of great importance for research and development of new materials for electro-optical devices
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Farid Abdi. Etude des propriétés électro-optiques de matériaux ferroélectriques (KDP,BaTi- O3,PbTiO3), en fonction de la température et de la fréquence de modulation. Autre [cond-mat.other]. Université Paul Verlaine - Metz, 1992. Français. ⟨NNT : 1992METZ022S⟩. ⟨tel-01775983⟩

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