Optical properties in spherical quantum dots of Deng Fan Yukawa potential model.

The application of semiconductors has caught the interest of researchers because of the possibility to design structures with different geometrical shapes and sizes by varying the physical properties. The optical properties are one of the physical properties of the semiconductor. It provides an important tool for studying energy band structure, impurity levels, excitons, localized defects, lattice vibrations, and certain magnetic excitations. Mostly, researchers improving these properties experimentally. This gap makes an opportunity to explore the new design of semiconductors based on the optical properties theoretically. The aim of the reported work was to study the optical properties in the spherical quantum dot confined in the Deng fan Yukawa potential. The Schrödinger equation for Deng Fan Yukawa potential was solved using the NUFA method to obtain the analytical expressions of the eigen energies and the eigenfunctions. The eigenfunction which was a function of the energy spectra was determined from the eigenfunction equations and the calculated energy spectra. By applying the eigen energies and wave functions, the linear, the third-order nonlinear changes in absorption coefficients and refractive index were investigated using the density matrix formalism. The result shows that the non-relativistic energy spectra of the system increase by the increase of the principal quantum number and it is also seen that the energy spectra increase by the decrease of the inter-nuclear distance. The susceptibility coefficients, the absorption coefficient, and the change of the refractive index were determined and it can be visualized using computational programming for future analysis. [ABSTRACT FROM AUTHOR]