A theoretical model is proposed for observing Fano resonances in a two-well structure in an electric field directed along the growth axis of the structure. Theoretical considerations make it possible to estimate the probability of photoionization of the structure depending on the values of the varied structural parameters. Comparison of the curves of the dependences of resonant photoionization on energy, constructed for different values of the electric field strength, allows us to judge the nature and degree of the field effect on the formation of Fano resonances. In addition, it becomes possible, based on the experimental values of the photoionization probabilities of the double-well structure, to solve the inverse problem: to estimate the possible structural parameters from the fixed shapes of the Fano resonance line. In the proposed scheme for the formation of Fano resonances, transitions to quasi-discrete levels against the background of a continuum of states above the QW are also considered, which make a corresponding contribution to the destructive interference of the photoionization paths of the two-well structure and lead to certain transformations of the asymmetric curves of Fano resonances depending on the strength of the external electric field.

提出了一种理论模型，用于在沿结构的生长轴定向的电场中观察两井结构中的Fano共振。理论上的考虑使得可以根据变化的结构参数的值来估计结构的光电离的可能性。比较为电场强度的不同值构造的共振光电离对能量的依赖性曲线，可以判断电场对Fano共振形成的性质和程度。另外，基于双阱结构的光电离概率的实验值，有可能解决反问题：从Fano共振线的固定形状估计可能的结构参数。