Multiple time scale blinking in InAs quantum dot single-photon sources
Multiple time scale blinking in InAs quantum dot single-photon sources
复制标题
DOI：
10.1103/physrevb.89.161303
复制
发表时间：
2014-04-16
影响因子：
3.7
通讯作者：
Srinivasan, Kartik
中科院分区：
文献类型：
--
作者：
Davanco, Marcelo;Hellberg, C. Stephen;Srinivasan, Kartik
我们使用光子相关测量来研究位于圆形布拉格光栅和微盘腔中的单个外延生长的自组装 InAs 量子点的闪烁。对归一化二阶相关函数 g((2))(tau) 在 11 个数量级的时间范围内进行了研究，并显示了从数十纳秒到数十毫秒的时间尺度上的闪烁特征。 g((2))(t) 数据适合包含多个非辐射（暗）态的多级系统速率方程模型，从中获得明显小于 1 的辐射量子产率。即使在发射时间轨迹数据的直接直方图分析产生不确定结果的情况下，也会观察到这种行为。
We use photon correlation measurements to study blinking in single, epitaxially grown self-assembled InAs quantum dots situated in circular Bragg grating and microdisk cavities. The normalized second-order correlation function g((2))(tau) is studied across 11 orders of magnitude in time, and shows signatures of blinking over time scales ranging from tens of nanoseconds to tens of milliseconds. The g((2))(t) data is fit to a multilevel system rate equation model that includes multiple nonradiating (dark) states, from which radiative quantum yields significantly less than 1 are obtained. This behavior is observed even in situations for which a direct histogramming analysis of the emission time-trace data produces inconclusive results.