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.

The third order susceptibility is obtained as a function of wavelength for CdSe–ZnS–CdSe structure. The intensity and position of susceptibility depend on outer shell and barrier layer thickness.Figure optionsDownload as PowerPoint slideHighlights
► Quadratic electro optic effect has been investigated for core/shell/shell structure.
► The third order susceptibility depends on the thickness shells and time relaxation.
► The intensity and position of this susceptibility peaks depend on shell thicknesses.
► For a given nanoshell, these peaks may be strongly tuned by changing the thicknesses.