High-temperature quasi-continuous operation of optically pumped CdZnTe/ZnTe multiple-quantum-well lasers at 620 nm
Low-lasing-threshold quasi-continuous optically pumped II-VI quantum-well lasers were operated well above room temperature at 620 nm. This result shows promise for high-repetition-rate, short-pulse generation by direct modulation of the injection current and also CW operation of future wide-gap II-VI diode lasers above room temperature.<<ETX>>
Full-potential investigation of the electronic and optical properties of stressed CdTe and ZnTe
A new first principles method was performed in order to study systematically and more accurately the electronic and optical properties of stressed CdTe and ZnTe. Our calculations are based on the full-potential augmented plane wave plus local orbitals approach including d-metal states in the valence bands. The pressure coefficients of the band gaps and deformation potentials were determined. The sublinear behavior with pressure for both the ionic character and the refractive index was checked. Our results are in good agreement with other theoretical and experimental data.
Variations common to the interplanetary magnetic field, the zonal atmospheric circulation and the earth's rotation
A study of the cyclic fluctuations in the earth's rotation, the geomagnetic field, the global atmospheric circulation and solar activity reveals the existence of 50-day and 120-day oscillations common to all. Our results, as well as the results obtained by radiometric measurements from the satellites Nimbus-7 and the Solar Maximum Mission (Wilson 1982; Pap 1985), suggest that their origin lies in the physical processes in the sun. The mechanism remains unexplained but from this work it follows that the role of the interplanetary magnetic field could very well be important.