The effect of the electric field and intense laser field on the intersubband transition and optical absorption in an Al0.3Ga0.7As/GaAs asymmetric double quantum well is theoretically investigated by using the transfer matrix approach.The Hartree potential due to the electron-electron interaction is considered in our calculation.For intersubband transitions in an asymmetric double quantum well,the peaks of the absorption coefficient are found to be a blue or red shifted by tuning the intensity of the laser f...