Nonlocal effects on intersubband optical absorption in square quantum wells

Based on the microscopic nonlocal optical response theory, the influence from the width and depth of the potential well on the nonlocal effects and optical absorption spectra of the square quantum well is investigated in detail.The numerical results show that the radiative shift of the spectrum line, which stems from the nonlocality of optical responses, is dependent closely on the width and depth of the potential well. It is also demonstrated that the width and depth of the quantum well have important influence on the optical absorbance from the intersubband transitions. The theoretical work may be important for the growth of the nonlocal nano-materials and the potential application in optoelectronics. (C) 2015 Elsevier GmbH. All rights reserved.