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Träfflista för sökning "WFRF:(Wronkowska A.A.) srt2:(2008)"

Sökning: WFRF:(Wronkowska A.A.) > (2008)

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1.
  • Wronkowska, A.A., et al. (författare)
  • Lattice absorption of Be-containing semiconductor alloys determined by spectroscopic ellipsometry
  • 2008
  • Ingår i: Physica Status Solidi (a) applications and materials science. - Weinheim, Germany : Wiley-VCH Verlagsgesellschaft. - 1862-6300 .- 1862-6319. ; 205:4, s. 849-853
  • Tidskriftsartikel (refereegranskat)abstract
    • Lattice absorption of Zn1–x –yBex Mgy Se and Cd1–x –yBex Zny Se mixed crystals grown by a high pressure Bridgman method has been investigated by infrared spectroscopic ellipsometry in the wave number range from 230 cm–1 to 5000 cm–1. Ellipsometric spectra of Cd1–x –yBex Zny Se crystals display features in the spectral range 350–550 cm–1 associated with BeSe-type phonon modes. In the optical spectra of Zn1–x –yBex Mgy Se crystals both BeSe-type and MgSe-type lattice absorption bands are detected. The MgSe-like modes are located at approximately 300 cm–1. The frequencies and oscillator strengths of optical phonon modes depend strongly on the alloy composition
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2.
  • Wronkowska, A.A., et al. (författare)
  • Spectroscopic ellipsometry and photoluminescence investigation of Zn1-x-yBexMgySe and Cd1-x-yBexZnySe Crystals
  • 2008
  • Ingår i: Physica Status Solidi (a) applications and materials science. - : Wiley-VCH Verlagsgesellschaft. - 1862-6300 .- 1862-6319. ; 205:4, s. 854-858
  • Tidskriftsartikel (refereegranskat)abstract
    • Optical and luminescence properties of the Bridgman-grown Cd1–x –yBex Zny Se and Zn1–x –yBex Mgy Se crystals are reported. Spectroscopic ellipsometry was employed for determination of spectral dependence of the complex dielectric function (E) in the photon energy range 0.75–6.5 eV. Below the absorption edge the refractive indices n (E) of the alloys were modelled using a Sellmeier-type relation. The excitonic band-gap energies were estimated from the ellipsometric and photoluminescence measurements. Compositional effects in the ellipsometric and photoluminescence spectra are discussed.
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  • Resultat 1-2 av 2

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