Optical Properties In The Spherical Quantum Dots Under An Electric Field And Hydrostatic Pressure

The linear and nonlinear optical optical absorption coefficients in spherical quantum dot GaN/AlxGa1-xN were investigated with the effective mass approximation and variational method. The wave function and the energy levels of the ground state and first excited state have been obtained. The linear and nonlinear optical absorption coefficient were calculated with electric field and hydrostatic pressure, the components, the size of quantum dots, and the change of the light intensity. The results showed that total absorption coefficient peak moved to the long-wave direction with the increase of electric field and the quantum dot size, and the total optical absorption coefficient peak reduced. The results indicated that the total peak of optical absorption coefficients increase with the increase of Al composition, and the peak of absorption coefficient was found to blue-shift. It is found that the total absorption coefficient decreased with the increase of light intensity, and the total absorption coefficient decreased with the increase of hydrostatic pressure and size. Pressure effect is obvious.