Multielement IR sources with alternating contrast

An array of InSb-based IR sources, employing the principle of excitation of positive and negative luminescence under conditions of the magnetoconcentr ation effect, was studied by a thermal imaging technique. The IR array allo ws a positive, negative, or alternating effective temperature contrast to b e simulated in a wavelength range of up to 7 mum. The effective temperature of the negative electroluminescence sources operating at room temperature can be decreased by 20 K. Devices of this type can be used as IR test patte rns with controlled contrast for calibrating optoelectronic devices with re spect to spatial, temperature, and time resolution. (C) 2001 MAIK "Nauka/ I nterperiodica".