Xie Z G, Götzinger S, Fang W, Cao H, Solomon G S
Department of Applied Physics, Stanford University, Stanford, California 94305, USA.
Phys Rev Lett. 2007 Mar 16;98(11):117401. doi: 10.1103/PhysRevLett.98.117401. Epub 2007 Mar 13.
We report a quantum dot microcavity laser with a cw sub-microW lasing threshold, where a significant reduction of the lasing threshold is observed when a single quantum dot (QD) state is aligned with a cavity mode. The quality factor exceeds 15,000 before the system lases. When no QD states are resonant, below threshold the cavity mode initially degrades with increasing pump power, after which saturation occurs and then the cavity mode recovers. We associate the initial cavity mode spoiling with QD state broadening that occurs with increasing pump power.
我们报道了一种具有连续波光亚微瓦激射阈值的量子点微腔激光器，当单个量子点（QD）态与腔模对齐时，观察到激射阈值显著降低。在系统激射之前，品质因数超过15000。当没有量子点态发生共振时，在阈值以下，腔模最初会随着泵浦功率的增加而劣化，之后出现饱和，然后腔模恢复。我们将初始腔模的破坏与随着泵浦功率增加而发生的量子点态展宽联系起来。
