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) Plots of αmn versus photon energy for different (a) well widths and (b) middle barrier thickness. The peak value indicates the main contribution of the transition of an electron from state m to n denoted by m–n in the graphs. |