Optical anisotropy in the VUV range : experimental studies and dielectric constants of monoclinic GaTe

G. Levêque , C.G. Olson , D.W. Lynch

Normal and oblique incidence reflectances of GaTe have been measured in the 2.5 to 26 eV range using polarized synchrotron radiation. We have deduced 3 complex refractive indices, relative to 3 different crystallographic directions by means of a new method consistent with the Kramers-Kronig relations. We have verified that the electronic transitions in the 20 eV region, from the 3d Ga levels, are strongly localized near gallium atoms. Some transitions from the valence band also appear localized.

Mots clés: gallium compounds; III VI semiconductors; Kramers Kronig relations; permittivity; reflectivity; refractive index; visible and ultraviolet spectra of inorganic solids

Domaines: Articles anciens

G. Levêque, C.G. Olson, D.W. Lynch. Optical anisotropy in the VUV range : experimental studies and dielectric constants of monoclinic GaTe. Journal de Physique, 1984, 45 (10), pp.1699-1706. ⟨10.1051/jphys:0198400450100169900⟩. ⟨jpa-00209911⟩