The Faculty of Technology, Art and Design, Oslo and Akershus University College of Applied Sciences, Oslo, Norway.
J Phys Condens Matter. 2013 Aug 7;25(31):315802. doi: 10.1088/0953-8984/25/31/315802. Epub 2013 Jul 9.
The dynamics of a system in which an electron is incident on a populated quantum dot is studied by resolving the time dependence of the system. Specifically, one electron is initially at rest in the ground state of the dot, whereas the incident electron has a narrow velocity distribution. In addition to the probabilities of reflection and transmission, the probability of excitation is found as a function of energy. Moreover, probabilities of both electrons being ejected or both being captured are obtained. The latter process involves spontaneous emission. It is found that the dynamics is strongly influenced by the presence of doubly excited states; reflection becomes considerably more probable in the energetic vicinity of such states. This, in turn, contributes to an increase in the probability of trapping also the second electron within the dot.
通过解析系统的时间依赖性来研究电子入射到填充量子点的系统的动力学。具体来说，一个电子最初在量子点的基态静止，而入射电子具有狭窄的速度分布。除了反射和透射的概率外，还发现了激发概率作为能量的函数。此外，还获得了两个电子都被发射或都被捕获的概率。后一个过程涉及自发发射。结果发现，动力学受双激发态的存在强烈影响；在这种状态的能量附近，反射变得相当可能。这反过来又导致在量子点内捕获第二个电子的概率也增加。
