For A-oxide we have two versions of optical constants: A set obtained from a universal oxide fit of R and T spectra of a thick layer, and another set for a thin film.
Thick layer (233 nm):
Spectra: DD1_A-Oxide_MS_thick_S1_r.spc and DD1_A-Oxide_MS_thick_S1_t.spc
Bandgap (OJL model): 6.265 eV
Tail state exponent (OJL model) : 0.109 eV
Dielectric background: 0.930
Refractive index:
Absorption coefficient:
Thin layer (33 nm):
Spectra: DD1_A-Oxide_MS_thin_S1_r.spc and DD1_A-Oxide_MS_thin_S1_t.spc
Dielectric background: 0.977
All other parameters like above (thick layer)