Blue-shift and broadening of optical spectra from response nonlocality in quantum wells

We show the nonlocal linear optical response of electrons to light field can induce the radiative shift and broadening of optical spectra in square quantum wells (SQW’s), and they can be controlled by an applied static electric field. In addition, it is also analyzed how the nonlocal effects will depend on the potential of quantum wells. This work may result in a substantial impact on the growth of the nonlocal materials.