Refractive Indices of Semiconductors from Energy gaps

TL;DR

This paper proposes an empirical model linking energy gaps to refractive indices in semiconductors, enabling calculations across various materials and conditions with results aligning well with existing data.

Contribution

The study introduces a new empirical relation for calculating refractive indices from energy gaps applicable to diverse semiconductors and temperature conditions.

Findings

Model accurately predicts refractive indices for binary and ternary semiconductors.

Calculated dielectric constants align with known values.

Temperature effects on refractive index are quantified.

Abstract

An empirical relation based on energy gap and refractive index data has been proposed in the present study to calculate the refractive index of semiconductors. The proposed model is then applied to binary as well as ternary semiconductors for a wide range of energy gap. Using the relation, dielectric constants of some III-V group semiconductors are calculated. The calculated values for different group of binary semiconductors, alkali halides and ternary semiconductors fairly agree with other calculations and known values over a wide range of energy gap. The temperature variation of refractive index for some binary semiconductors have been calculated.