Cadmium phosphide as a new material for infrared converters

Possible use of cadmium phosphide (Cd₃P₂) for infrared converter systems has been debated. The interband absorption coefficient calculations has been executed for single crystals of n-Cd₃P₂ and interpreted in the exact generalized Kildal band model. Relationship between the absorption coefficient and radiation temperature is presented. On the ground of our calculations, the theoretical temperature dependences of the maximum values of photovoltage and efficiency have been obtained. A common thermo-dynamical approach was applied in this case. The source of radiation was a black body. In our investigations, the barrier structure on metal-semiconductor basis with the Schottky layer has been considered. The operation temperature range for the Me–n-Cd₃P₂ converter has been found

Effect of symmetry center losses on energy bands and carrier kinematics in Zn₃As₂ and Cd₃As₂

The comparative analysis of the band structure and carrier kinematics for Zn₃As₂ and Cd₃As₂ has been executed. The influence of presence and absence of symmetry center in different crystalline phases of the above materials is explored. The direct and indirect solutions of dispersion equations were used for the analysis. The results of researches are presented in the form of graphic dependences. The splitting of energy bands caused by the symmetry center loss is estimated. Such splitting is maximal along any directions normal to the main crystalline axis. The principle possibility of the carrier separation by spin with the use of found distinction for the modules of their velocities is shown

Bacteriorhodopsin and its mutants for light-induced anisotropy and dinamic holography recording

We present our results on the optimization of light-induced anisotropy characteristics and holography recording on the films of genetically and chemically modified bacteriorhodopsin (BR), the photochromic retinal protein. Gelatin films with chemically modified D96N and D96E BR mutants might be promising for both optical data storage and spatial light modulators. We were the first to show that E204Q BR films (wherein the proton release complex in the protein is affected), exhibit a considerable increase in the diffraction efficiency and initial peak sharpness in the holography recording kinetics as compared to wild type BR and D96N BR. The E204Q BR is the only known holographic reversible material where such sharpness of the initial transient process is observed in dynamic recording by low-intensity red light from a cw He—Ne laser

Recollections of Professor Yuriy Reznikov

International audienc