We report the coupling of individual InAs quantum dots (QDs) to an external-mirror microcavity. The external mirror is bonded to a fiber and positioned above a semiconductor sample consisting of a QD-containing GaAs layer on top of a distributed Bragg reflector (DBR). This open cavity can be rapidly tuned with a piezoelectric actuator without negatively affecting the QD linewidth. A mirror radius of curvature of 42 microns and a cavity length of 10 microns enable good mode-matching and thus high collection efficiency directly into the fiber. With an improved finesse this system may enter the strong coupling regime.
Strong coupling regimes of an organic exciton mirror in a microcavity
Carl von Ossietzky Universität Oldenburg(奥尔登堡卡尔·冯·奥西茨基大学);Friedrich Schiller University Jena(耶拿弗里德里希·席勒大学);Fraunhofer-Institute for Applied Optics and Precision Engineering IOF(弗劳恩霍夫应用光学和精密工程研究所);University of Bonn(波恩大学);University of Iceland, Science Institute(冰岛大学理学院)
Estudio Teórico del espectro de emisión para un sistema microcavidad-punto cuántico en una aproximación de campo medio (Theoretical study of emission spectrum for a quantum dot-microcavity system in a mean field approximation)
在此工作中,我们获得了一个数学表达式,用于计算微腔系统的排放光谱-使用一个campo medio en el formalismo de la matriz densidad的参数。该系统模型是一个微柱半导体,其在微腔内部具有一个圆形的横向孔,该系统提供了一个穿过腔体和横向孔的激励器的通道。获得一种不允许我们计算排放光谱的中型牧场主教练。本文利用平均场论的密度矩阵方法,推导了一个计算量子点-微腔系统发射光谱的数值表达式。所建模的开放系统是在微腔内包含单个量子点的典型半导体微柱,该系统呈现光子通过腔镜的泄漏和激子到量子点的泵浦。我们得到了一个平均场非线性主方程,使我们能够计算的发射光谱。