Abstract
The rate of variation of transmission as a function of frequency or energy exhibits a maximum in the fundamental absorption region of the alloy semiconductor Hg 1− x Cd x Te. The maximum steepness occurs in the tail region of the absorption edge and its frequency can be correlated analytically with the composition. From the experimental measurements of room temperature IR transmission on both bulk grown and epilayers of Hg 1− x Cd x Te, it is shown that an analysis of the transmission curve at (d T r/d E) max leads to the determination of composition and compositional uniformity in the given sample.
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