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Optical anisotropy of ZnO in the ultraviolet region
Author(s) -
Klucker R.,
Nelkowski H.,
Park Y. S.,
Skibowski M.,
Wagner T. S.
Publication year - 1971
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2220450130
Subject(s) - wurtzite crystal structure , dielectric function , polarization (electrochemistry) , dielectric , anisotropy , reflectivity , perpendicular , spectral line , electronic band structure , condensed matter physics , linear polarization , optics , physics , materials science , atomic physics , chemistry , optoelectronics , quantum mechanics , laser , mathematics , diffraction , geometry
The reflectivity of ZnO single crystals was measured at near normal incidence in the energy region from 3 to 25 eV with linearly polarized light, the electric field vector lying perpendicular and parallel to the c ‐axis. From the reflectivity the optical constants n and k , the complex dielectric constant ε = ε 1 ε i ε 2 and the energy loss function L = |Im ε −1 | have been computed by a Kramers‐Kronig analysis for both directions of polarization. The profiles of the spectra differ completely from those of other II–VI compounds of the wurtzite structure. The energetic positions and the polarization dependence of the peaks in the reflectivity and the ε 2 spectra can be related to the results of the first complete band structure calculation accomplished by Rössler using the Korringa‐Kohn‐Rostocker method.