Abstract

Based on the calculation of photon absorption coefficient α and width W of the depletion region of mercury cadmium telluride detectors, we derived the equation for α, W and the effective Franz–Keldysh shift Δλ_ce. An interpretation of the substantial difference between Δλ_ce and the maximum Franz–Keldysh shift Δλ_cm of the cutoff wavelength is presented. We also propose a method to increase the Δλ_ce of mercury cadmium telluride detectors.

© 1997 Optical Society of America

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