Optical Absorption In A Strained Wurtzite Semiconductor Cylindrical Quantum Dot Under Hydrostatic Pressure

In the effective mass approximation, Intersubband linear and nonlinear optical absorption coefficient in a strained semiconductor wurtzite GaN/AlxGa1-xN cylindrical quantum dot have been studied under hydrostatic pressure. The wave functions and energy levels are obtained by separation variable method. Light absorption coefficients were calculated with the quantum dot size, composition and light density changes in the relationship. The hydrostatic pressure effect on light absorption was studied. The results indicated that the peak of absorption coefficients increase with the increase of Al composition and decrease of the size, and blue-shift. The peak absorption coefficients decrease with the hydrostatic pressure, and red-shift.