Optical properties of ZnTe layers formed over surface-modified ZnSe substrates

• Published in: Applied surface science 2008-11, Vol.255 (3), p.767-769
• Main Authors: Makhniy, V.P., Mel’nyk, V.V., Slyotov, M.M., Gorley, P.N., Horley, P.P., Vorobiev, Yu.V., González-Hernández, J.
• Format: Article
• Language: English
• Subjects: Condensed matter: electronic structure, electrical, magnetic, and optical properties; Electron states and collective excitations in multilayers, quantum wells, mesoscopic, and nanoscale systems; Electron states and collective excitations in thin films, multilayers, quantum wells, mesoscopic and nanoscale systems; Electronic structure and electrical properties of surfaces, interfaces, thin films and low-dimensional structures; Exact sciences and technology; Isovalent replacement; Optical constants (including refractive index, complex dielectric constant, absorption, reflection and transmission coefficients, emissivity); Optical constants: refractive index, complex dielectric constant, absorption, reflection and transmission coefficients, emissivity; Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation; Optical properties of bulk materials and thin films; Photoluminescence; Physics; Quantum-scale surface structure; Spectrum; Zinc telluride and selenide
• ISSN: 0169-4332; 1873-5584
• DOI: 10.1016/j.apsusc.2008.07.022

Heterolayers of zinc telluride were created using the isovalent replacement method over the low-resistive mono-crystalline substrates of zinc selenide, doped with the isovalent tellurium impurity. It was found that the surface structure of the heterolayer is being determined by the treatment of the substrate layers and inherits its properties, namely mirror-smooth or matte (modified) surfaces. The latter type corresponds to the quantum-scale surface formations responsible for the wide unstructured spectral band with photon energies significantly exceeding the bandwidth of the materials studied.