Intersubband optical absorption of electrons in double parabolic quantum wells of AlxGa1−xAs/AlyGa1−yAs Project supported by the National Natural Science Foundation of China (Grant No. 61274098). |
(color online) Variations of αmn with photon energy for asymmetric (a) DPQWs and (b) DSQWs with F = 0 kV/cm; (c) DPQWs and (d) DSQWs with F = 15 kV/cm for different Al components. The peak values indicate the main contributions of the transition of an electron from states m to n denoted by m–n in the panels. |