Kramers-Kronig analysis of the reflectivity spectra of 2H-MoS₂, 2H-MoSe₂and 2H-MoTe₂

By extrapolating to 0 and 30 eV experimental data in the energy range from approximately 1-1.3 to 14 eV a Kramers-Kronig analysis of the reflectivity spectrum at room temperature from the basal plane (E perpendicular to c) of single crystals of 2H-MoS2, 2H-MoSe2 and 2H-MoTe2 has been performed. The optical data so obtained have been discussed and interpreted in terms of the proposed band model for these materials.