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oe1(光电查) - 科学论文

2 条数据
?? 中文（中国） ▾

  • The dispersion behaviors of the tripod-type four-level cylindrical quantum dot under phenomenon of electromagnetically induced transparency

    摘要： In this paper, linear and 3rd-order nonlinear group velocities of the probe laser field are investigated in a tripod-type four-level cylindrical quantum dot (TTFLCQD) with parabolic potential in electromagnetically induced transparency. The control lasers at z-polarization are applied to the system and the results are investigated. Also, linear and 3rd-order nonlinear group velocities in z-polarization are compared. The effects of parameters of TTFLCQD and control lasers on linear and 3rd-order nonlinear group velocities are explored. Finally, the results are discussed. The linear and 3rd-order nonlinear group velocities are compared at z-polarization. Furthermore, the effects of parameters of TTFLCQD and control lasers on linear and 3rd-order nonlinear group velocities are explored. Finally, the results are discussed. The linear and 3rd-order nonlinear group velocities are compared at z-polarization. Furthermore, the effects of parameters of TTFLCQD and control lasers on linear and 3rd-order nonlinear group velocities are explored. Finally, the results are discussed.

    关键词： Electromagnetically induced transparency,Tripod-type four-level cylindrical quantum dot,Nonlinear group velocity,Linear group velocity,Slow light

    更新于2025-09-23 15:19:57

  • Temperature effect on the binding energy and the diamagnetic susceptibility of a magneto-donor in Cylindrical Quantum Dot (GaAs/GaAlAs)

    摘要： In this work, the effect of the temperature on the binding energy and the diamagnetic susceptibility of a shallow magneto-donor confined to move in a cylindrical quantum dot made out of GaAs/GaAlAs is studied within the effective mass approximation. We describe the quantum confinement by an infinite deep potential. The results show that when the temperature or the magnetic field increases, (i) the binding energy increases and (ii) the absolute value of the diamagnetic susceptibility decreases. Its effects depend strongly on the size of the CQD.

    关键词： GaAs/GaAlAs,temperature effect,binding energy,cylindrical quantum dot,diamagnetic susceptibility,magneto-donor

    更新于2025-09-19 17:13:59