The calculated methods of the compositional dependence of the energy bandgap for Ga_xIn_(1-x)As_(1-y)Sb_y quaternary alloys are discussed in this paper. The dielectric theory of electronegativity and the linearinterpo...The calculated methods of the compositional dependence of the energy bandgap for Ga_xIn_(1-x)As_(1-y)Sb_y quaternary alloys are discussed in this paper. The dielectric theory of electronegativity and the linearinterpolation method were respectively used to calculate the compositional dependence of the energybandgap for Ca_xIn_(1-x)As_(1-y)Sb_y quaternary alloys. The same formula was deduced from the two schemes.According to the two formulas, we calculate the energy handgap as a function of alloy compositions forGa_xIn_(1-x)As_(1-y)Sb_y quaternary alloys: moreover, the temperature effect was lead into the formulas. Com-paring the calculated values with the measured ones, we found that the calculated method is in good agree-ment with the experimental data for Ga_xIn_(1-x)As_(1-y_Sb_y quaternary alloys.展开更多
The effects of optical field on the phenomenon of optical bistability(OB) are investigated in a K-type semiconductor double quantum well(SDQW) under various parametric conditions. It is shown that the OB threshold can...The effects of optical field on the phenomenon of optical bistability(OB) are investigated in a K-type semiconductor double quantum well(SDQW) under various parametric conditions. It is shown that the OB threshold can be manipulated by increasing the intensity of coupling field. The dependence of the shift of OB hysteresis curve on probe wavelength detuning is then explored. In order to demonstrate controllability of the OB in this SDQW, we compare the OB features of three different configurations which could arise in this SDQW scheme, i.e., K-type, Y-type, and inverted Y-type systems. The controllability of this semiconductor nanostructure medium makes the presented OB scheme more valuable for applications in all-optical switches, information storage, and logic circuits of all optical information processing.展开更多
文摘The calculated methods of the compositional dependence of the energy bandgap for Ga_xIn_(1-x)As_(1-y)Sb_y quaternary alloys are discussed in this paper. The dielectric theory of electronegativity and the linearinterpolation method were respectively used to calculate the compositional dependence of the energybandgap for Ca_xIn_(1-x)As_(1-y)Sb_y quaternary alloys. The same formula was deduced from the two schemes.According to the two formulas, we calculate the energy handgap as a function of alloy compositions forGa_xIn_(1-x)As_(1-y)Sb_y quaternary alloys: moreover, the temperature effect was lead into the formulas. Com-paring the calculated values with the measured ones, we found that the calculated method is in good agree-ment with the experimental data for Ga_xIn_(1-x)As_(1-y_Sb_y quaternary alloys.
基金supported by the Lithuanian Research Council(Grant No.VP1-3.1-M-01-V-03-001)
文摘The effects of optical field on the phenomenon of optical bistability(OB) are investigated in a K-type semiconductor double quantum well(SDQW) under various parametric conditions. It is shown that the OB threshold can be manipulated by increasing the intensity of coupling field. The dependence of the shift of OB hysteresis curve on probe wavelength detuning is then explored. In order to demonstrate controllability of the OB in this SDQW, we compare the OB features of three different configurations which could arise in this SDQW scheme, i.e., K-type, Y-type, and inverted Y-type systems. The controllability of this semiconductor nanostructure medium makes the presented OB scheme more valuable for applications in all-optical switches, information storage, and logic circuits of all optical information processing.
