Refractive indices and electro-optic coefficients of the eulitities Bi4Ge3O12 and Bi4Si3O12

Abstract

Measurements are reported on the refractive index n and of the static electro‐optic coefficient r₄₁ as a function of wavelength throughout the visible for Bi₄Ge₃O₁₂ and Bi₄Si₃O₁₂. Both materials exhibit large dispersion. At 633 nm, n=2.0975 for the germanate and 2.0211 for the silicate. The corresponding values for r₄₁ are 0.95×10⁻¹⁰ cm/V and 0.54×10⁻¹⁰ cm/V, respectively.