Linear And Nonlinear Optical Properties Of Gas Quantum Dot

Abstract

In this thesis we have studied theoretically the linear and nonlinear optical properties of one electron GaAs quantum dot using the Schrdinger equation for rigid con nement. The studies on the linear and nonlinear optical properties involving lowest transition energy in quantum dot have the potential for promising device applications. In semiconductor quan- tum dots, the nonlinear optical properties are known to be greatly enhanced as compared to bulk semiconductors. The work presented in this thesis presented the linear and nonlinear optical properties such as the real and imaginary part of dielectric constant. The index of refraction and the absorption coe cient are studied. The theoretical investigation of the optical properties in spherical one electron quantum dot will lead to a better under- standing of the properties of quantum dots. Thus it is found that the absolute strength of resonance is indeed large compared to typical absorption behavior of the bulk materials. It is observed that decrease the size of the quantum dot lead to a blue shift in peak positions of the absorption coe cient, refractive index and dielectric constant. A decrease in the total absorption coe cient and refractive index change is observed with increasing optical intensity. The present study would be a useful contribution to experimental work on linear and nonlinear optical properties of GaAs quantum dot.