Institute of Physics, Maria Curie-Skłodowska University, Lublin, Poland.
J Phys Condens Matter. 2012 May 23;24(20):205301. doi: 10.1088/0953-8984/24/20/205301. Epub 2012 Apr 24.
We study theoretically the coherent pump-probe intersubband response of a multiple quantum well (MQW) embedded in a semiconductor microcavity. An n-type doped MQW structure with two subbands in the conduction band is considered. Self-consistent numerical calculations are performed for realistic systems employing a semiclassical approach based on the transfer matrix formalism and the so-called sheet model. They show that in the strong coupling limit the pumping of the system leads to evolution of the intersubband cavity polariton doublet into a Mollow-type spectrum. By using appropriate angles, both the pump and the probe light can be tuned into resonance with the cavity mode. In this double-resonance case, simultaneously with a dramatic enhancement of the Rabi flopping frequency, a strong selective enhancement of distinct parts of the Rabi sidebands is possible.
我们从理论上研究了嵌入半导体微腔中的多量子阱（MQW）的相干泵浦探测子带间响应。考虑了具有两个导带子带的 n 型掺杂 MQW 结构。采用基于转移矩阵形式和所谓的薄片模型的半经典方法对实际系统进行了自洽数值计算。结果表明，在强耦合极限下，系统的泵浦导致子带腔极化激元双原子对演化为 Mollow 型谱。通过使用适当的角度，泵浦光和探测光都可以调谐到与腔模共振。在这种双共振情况下，伴随着 Rabi 翻转频率的急剧增强，Rabi 边带的不同部分的选择性增强是可能的。
