Electric field effects on the linear and nonlinear intersubband optical properties of double semi-parabolic quantum wells

► Electric field effects on the optical properties of DSPQWs are investigated. ► The anti-crossing effect occurs for the asymmetric DSPQW by applying electric field. ► Electric field greatly influences the magnitude and position of the resonant peaks. ► Optical properties show their maximum magnitude for certain values of electric field. ► Resonant peaks of the symmetric DSPQW suffer a blue-shift by applying electric field.