Dispersion of electro-optic coefficients in sillenite crystals |
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Authors: | A T Efremidis N C Deliolanis C Manolikas and E D Vanidhis |
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Institution: | 1.Department of Physics—Solid State Section,Aristotle University of Thessaloniki,Thessaloniki,Greece |
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Abstract: | The photorefractive crystals of the sillenite family (Bi12SiO20 or BSO, Bi12GeO20 or BGO, and Bi12TiO20 or BTO) that belong to the cubic 23 point group are optically active, and exhibit the piezoelectric, elasto-optic, electro-optic
and electrogyration effect. In this paper we measure the dispersion of the electro-optic coefficient for all the crystals
of the sillenite family in the visible spectral range (500–800 nm). For this we measure by ellipsometry the polarization properties
of a beam transmitted in the transverse configuration under the action of an externally applied field. The experimental data
are fitted with an analytical expression of the beam polarization to find the electro-optic coefficient. The results show
a normal dispersion of the electro-optic coefficient in all three sillenite crystals, similarly to other electro-optic crystals. |
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Keywords: | PACS" target="_blank">PACS 42 70 Nq 78 20 Jq 42 65 Hw |
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