Applied physics

, Volume 18, Issue 2, pp 123–130 | Cite as

Ellipsometric spectroscopy of the ZnO nonpolar\((1\bar 100)\) surface

  • R. Matz
  • H. Lüth
Contributed Papers

Abstract

Ellipsometric spectroscopy has been performed on nonpolar ZnO\((1\bar 100)\) surfaces in the spectral range 1.5 eV<ħω<4.0 eV. Absolute measurements with two different crystal orientations in air allow the determination of the optical constantsn ,k andn ,k for light polarized parallel and perpendicular to thec-axis. The ellipsometric angles Δ and ψ are changed remarkably on ultrahigh vacuum cleaved surfaces near the band gap energy of ∼3.4eV when oxygen or atomic hydrogen is adsorbed or when the crystal is annealed. This observation is interpreted in terms of a field effect on the optical constants in the space charge layer.

PACS

82.65 42.80 07 

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Copyright information

© Springer-Verlag 1979

Authors and Affiliations

  • R. Matz
    • 1
  • H. Lüth
    • 1
  1. 1.2. Physikalisches InstitutRheinisch-Westfälische Technische HochschuleAachenFed. Rep. Germany

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