Abstract
A simple model is presented for the complex dielectric function, ε(E)=ε1(E)+iε2(E), of CdxZn1−xSe alloy. The effects of alloy composition are properly taken into consideration in the calculation. The model is applicable over the entire range of photon energies, below and above the lowest band gap, and is in relatively good agreement with the existing experimental data. Dielectric-function-related optical constants, such as the real refractive index (n), extinction coefficient (k), and high-frequency dielectric constant (ε∞), of this alloy system have also been presented. The present results can be used in the design and analysis of various optoelectronic devices using this alloy system.
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