Artificial control of optical gain polarization by stacking quantum dot layers
Artificial control of optical gain polarization by stacking quantum dot layers
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DOI：
10.1063/1.2206126
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发表时间：
2006-05
影响因子：
4
通讯作者：
T. Kita;N. Tamura;O. Wada;M. Sugawara;Y. Nakata;H. Ebe;Y. Arakawa
中科院分区：
文献类型：
--
作者：
T. Kita;N. Tamura;O. Wada;M. Sugawara;Y. Nakata;H. Ebe;Y. Arakawa
通过控制点形状证明了 InAs/GaAs 量子点 (QD) 光学放大器的偏振不敏感性。通过紧密堆叠 InAs 岛形成柱状 QD 来控制 QD 的高度。使用可变条带长度方法研究了柱状量子点的室温偏振放大自发发射。随着纵横比的增加，实现了横磁模式主导的光学增益。我们获得了具有七个堆叠层的量子点的几乎偏振不敏感的光学增益。
Polarization insensitivity of InAs∕GaAs quantum dot (QD) optical amplifier has been demonstrated by controlling the dot shape. The height of the QD has been controlled by stacking closely InAs islands to form a columnar QD. Room-temperature polarized amplified spontaneous emission from the columnar QDs has been investigated by using variable stripe-length method. With increasing the aspect ratio, transverse-magnetic-mode-dominant optical gain has been achieved. We obtained almost polarization insensitive optical gain for QDs with seven stacking layers.