Pockels效应对布里渊散射张量的修正

Correction from the Pockels Effect to the Brillouin Scattering Tensor

从电磁场方程和压电本构方程出发。借助于准静态近似的物理图像，导出了压电晶体中准静电场的表达式。给出了Ｐｏｃｋｅｌｓ效应对布里渊散射张量修正的一般形式．对１９种非中心对称点群晶体的高对称方向纯模作了具体计算，并对结果作了讨论．

An expression for the quasielectrostatic field in piezoelectric crystals has been derived from both electromagnetic field equations and piezoelectric constitutive equations with the help of the physical picture of quasistatic approximation. A general formula for the correction of the Pockels effect to theBrillouin scattering tensor is given. The corresponding calculation is made forthe pure modes in the directions with higher-symmetry for nineteen noncentrosymmetrical point groups. The physical significance of the result is discussed.