与半导体微腔强耦合量子点的光子阻塞和非线性效应
Photon blockade and nonlinear effects for a quantum dot strongly coupled to a semiconductor microcavity
摘要:
我们的模型全面模拟现代纳米半导体微腔,将腔量子电动力学在弱耦合和强耦合制度,使用共振激光激发和非共振激发由于润湿层。对于弱耦合,最显著的效应是光子反聚束与非共振发射。我们研究了反聚束特性如何随着腔精细度向强耦合区增加而变化。反聚束也可以在共振激发的强耦合系统中观察到,使用光子阻塞机制,这已在原子系统中得到证实。我们计算什么样的腔参数需要观察到这种效果。实验上,这些研究相当于非线性泵探测测量,其中强泵,无论是共振或非共振,用于激发耦合系统,并产生的状态的特征在于使用一个弱的,共振探测光束。
英文摘要:
Our model comprehensively simulates modern nanoscale semiconductor microcavities incorporating cavity quantum electrodynamics within both the weak and strong coupling regimes, using on-resonant laser excitation and nonresonant excitation due to a wetting layer. For weak coupling, the most significant effect is photon antibunching with nonresonant emission. We investigate how the antibunching characteristics change as the cavity finesse is increased towards the strong coupling regime. Antibunching can also be observed in a strongly coupled system with resonant excitation, using the photon blockade mechanism which has been demonstrated in atom systems. We calculate what cavity parameters are required to observe this effect. Experimentally these studies are equivalent to nonlinear pump probe measurements, where a strong pump, either resonant or nonresonant, is used to excite the coupled system, and the resulting state is characterized using a weak, resonant probe beam.
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