Optical Properties of Three Dimensional Two Electron Zinc Oxide(ZnO) Quantum Dot in Parabolic Confinement

Abstract

In this thesis, we discussed about the optical properties of three dimensional two electron zinc oxide (ZnO) quantum dot in parabolic confinement. Quantum dots are the minimum limit of low dimensional semiconductor systems in which the charge carriers (electrons and holes) are confined in all three directions of space. Quantum dots (QDs) refer to nanostructures made from semiconductor materials. Quantization of energy is the unique property of artificial atoms (quantum dots) and real atoms which makes quantum dots to be useful in studying the properties of systems at the atomic size scale. We discussed about the ground and excited state property of three dimensional(3D) two electron zinc oxide (ZnO) quantum dot in parabolic confinement. The ground and excited state energy eigenvalues of three dimensional(3D) two electron Zinc oxide(ZnO) quantum dot in parabolic confinement are obtained by using variational method. We use the variational method since the coupling constant is not small enough. Based on the obtained ground and excited state energy eigenvalues, the real and imaginary part of the third order susceptibilities are magnified for an increment of the confining frequency.