Abstract
Effects of hydrostatic pressure, temperature and Al-concentration on optical rectification (OR) of GaAs/Ga1−xAlxAs spherical quantum dots (QDs) under an inverse of a quadratic Hellmann potential are discussed in detail. The solution of Schrödinger equation is adopting Nikiforov–Uvarov (NU) method. Using the compact density-matrix approach and iterative method, an analytical expression of the OR coefficient can be obtained. The result of the calculation illuminates that hydrostatic pressure, temperature, Al-concentration and the radius of the QDs can make an impact on the energy level interval, dipole moment matrix elements, effective mass and other factors, so that the peak value of OR coefficient and resonance peak changing under the action of these factors. Furthermore, the potential height have a bearing on the OR coefficient.
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