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Two-inch size Nd3+-doped LaF3 single crystals was successfully grown by the Czochralski technique. No remarkable absorption due to unfavorable impurity was observed from optical absorption measurements in the vacuum ultra-violet spectral region. The high crystallinity and homogeneous Nd3+ distribution were found from X-ray rocking curve analysis and chemical composition analysis respectively. X-ray...
Frequency up-conversion describes the conversion of low energy incident photons towards higher energy photons via active material. Two-photon absorption is one of the approaches for this strategy which can improve the efficiency in the solar cell. In this report, the molecular structures were designed from the symmetrical grafting of two elongated conjugated linker on a conjugated core and then adding...
In recent years a great deal of interest has been focused in selecting III-V heterostructure materials for infrared detection applications by carefully altering their electrical, optical and transport properties with the help of atomic disorder, biaxial strain, space charge and the materials geometry. Among others, the superlattices (SLs) composed of InAs and GaSb layers with type II band alignments...
We report the absorption and photoluminescence (PL) properties of dilute InPN layers grown by liquid phase epitaxy. All samples were characterized by high resolution X-ray diffraction at room temperature. The band anticrossing model accounts very well for recent experimental results obtained on different samples. Our results indicate that a maximum amount of 0.2% nitrogen has been incorporated in...
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