Static Pockels constantspijandpijkofCaF2andBaF2under strain fromab initiocalculations

Zusammenfassung

Ab initio results for the static (linear) elasto-optic or Pockels constants p(ij) and (nonlinear) constants p(ijk) for the fluorite systems CaF2 and BaF2 are presented from investigating the dielectric tensor under various forms and sizes of strain. The contribution to the Pockels constant p(44) from the internal strain is important reducing the "bare" value by a factor of about 2 or more.