Quadratic electro-optic effect and electro-absorption process in CdSe–ZnS–CdSe structure

The third order nonlinearity susceptibility is obtained as a function of wavelength for CdSe–ZnS–CdSe structure. Numerical calculations show that the quadratic electro-optic and electro absorption effects of this structure depend on the parameters such as structure size, relaxation time and pump photon energy. By changing shells thickness, these structures can be designed with the susceptibility peak from the visible to infrared regions of the spectrum. The intensity and position of the third order nonlinearity susceptibility peaks depend on outer shell thickness and radius of the core.