Photoluminescence energy and fine structure splitting in single quantum dots by uniaxial stress
Photoluminescence energy and fine structure splitting in single quantum dots by uniaxial stress
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DOI：
10.1088/0256-307x/25/3/085
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发表时间：
2008-03-01
影响因子：
3.5
通讯作者：
Niu Zhi-Chuan
中科院分区：
文献类型：
--
作者：
Dou Xiu-Ming;Sun Bao-Quan;Niu Zhi-Chuan
本文报道了在液氮温度下，通过在[110]方向施加面内单轴压缩应力（沿着），单量子点的光致发光（PL）能量发生红移。单轴应力不仅影响量子点生长方向上的约束势，导致量子点的PL位移，而且影响量子点的圆柱对称性，这种影响可以通过PL峰半峰全宽的变化来反映。这意味着单轴应力在调节量子点的PL能量和精细结构分裂方面具有重要作用。
We report a photoluminescence (PL) energy red-shift of single quantum dots (QDs) by applying an in-plane compressive uniaxial stress along the [110] direction at a liquid nitrogen temperature. Uniaxial stress has an effect not only on the confinement potential in the growth direction which results in the PL shift, but also on the cylindrical symmetry of QDs which can be reflected by the change of the full width at half maximum of PL peak. This implies that uniaxial stress has an important role in tuning PL energy and fine structure splitting of QDs.