Science and Education Publishing International Journal of Physics 2333-4886 2 4 2014 08 08 Optical Transitions in Quantum Dots 109 111 EN A. Benahmed Faculty of the Sciences, FUNDAPL Laboratory, University of Blida.1, Algeria A. Aissat M. A. Benammar IJP2014243 10.12691/ijp-2-4-3 2014 06 03 2014 07 05 2014 08 08 The analysis of the electronic states of a quantum dot of InAs grown on a GaAs substrate has been studied for different geometries. We did the calculation with each type of geometry we based on the Schrödinger equation for stationary particle and we used "Comsol" for calculations. We calculated energy values as a function of each of the parameters: length, width and thickness of the wetting layer where other parameters are held constant.