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Studies on the Opto-electronic Constants of Alkali-halide Crystals

Salem, M.A., (2003) Studies on the Opto-electronic Constants of Alkali-halide Crystals. Jurnal Fizik Malaysia, 24 (1). pp. 1-8. ISSN 0128-0333

Full text not available from this repository.

Affiliations

Azhar University, Egypt. Faculty of Science. Dept. of Physics.

Abstract

In this presentation, the correlation between refractive index ($n$) of alkali-halide crystals and both energy band gap ($E_g$) and Pauling’s electronegativity difference ($\Delta X$) have been studied. The following relations are proposed for estimating the refractive index ($n$): $n^2$ + $C$ = $A / E_g^{1/2}$ and $n^2$ + $C$ = $E /(\Delta X)^{0.425}$ where $A$, $C$ and $E$ are numerical constants. In addition, an interrelation between the energy band gap ($E_g$) and electronegativity difference ($\Delta X$) has also been proposed. This relation reads as $E_g$ = $4.45(\Delta X)^{0.85}$. The estimated values of the refractive index are utilized to evaluate the electronic polarizability of alkali-halides ($\alpha_e$) by applying Lorentz-Lorentz formula. The computed values of refractive index, energy gap and electronic polarizability are compared with the literature ones.

Item Type:Journal
Subjects:Q Science, Computer Science
ID Code:3758

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