Optoelectronic properties of CdSe/ZnSe and ZnSe/CdSe core/shell spheroidal prolate quantum dots through the geometrical parameters and dielectric oxide matrix: A theoretical investigation

• Third-order nonlinear susceptibility in CdSe/ZnSe and ZnSe/CdSe prolate SCSQDs. • The Thirid-order nonlinear susceptibility is investigated with several capped matrices. • The optoelectronic properties are affected by the geometrical parameters and the immersed matrix. In this work, we have investigated theoretically the simultaneous effects of the geometrical parameters and encapsulated dioxide matrix on the electronic and optical properties of CdSe/ZnSe spheroidal prolate core/shell quantum dots (SPCSQDs). The energy eigenvalues and their related wavefunctions were calculated by solving the Schrodinger equation in spheroidal coordinates within the framework of the effective mass approximation (EMA). The third-order optical nonlinear (TON) susceptibility was computed and discussed under the Compact Density Matrix approach. Our numerical results revealed that the χ 3 for both structures: CdSe/ZnSe and ZnSe/CdSe SPCSQDs are strongly affected by the geometric factors and embedded dioxide matrix. We hope that this theoretical study can make a significant contribution to experimental studies and practical applications.