Permittivity spectra and characteristic energy losses of electrons in ZnO at 100 K

For the first time, full sets of fundamental optical functions have been obtained for zinc oxide in the range 0–30 eV at 100 K for E ⊥ c and E ‖ c polarizations. Spectra of the transverse and longitudinal components of transitions and their basic parameters (peak energies E _i , half-widths H _i of transition bands, band areas S _i , and oscillator strengths f _i ) have also been determined for the first time. The calculations are performed using synchrotron experimental reflectance spectra. The main features of spectra of the optical functions and components of transitions are established. These features are compared to the results of known theoretical calculations of the bands and spectra of optical functions.