She Yanchao, Zheng Xuejun, Wang Denglong, Zhang Weixi
Faculty of Materials, Optoelectronics and Physics, Xiangtan University, Hunan 411105, China.
Opt Express. 2013 Jul 15;21(14):17392-403. doi: 10.1364/OE.21.017392.
We consider the coupling effect between interdot tunneling coupling and external optical control field to study the linear optical property and the formation of temporal optical solitons in a quantum dot molecules system, analytically. The results show that the double tunneling induced transparency (TIT) windows are appeared in the absorption curve of probe field because of the formation of dynamic Stark splitting and quantum destructive interference effect from the two upper levels. Interestingly, the width of the TIT window becomes wider with the increasing intensity of the optical control field. We also find that the Kerr nonlinear effect of the probe field can be modulated effectively through coherent control both the control field and the interdot tunneling coupling in this system. Meanwhile, we demonstrate that the formation of dark or bright solitons can be practical regulated by varying the intensity of the optical control field.
我们通过解析方法研究量子点分子系统中量子点间隧穿耦合与外部光控场之间的耦合效应，以探讨线性光学性质及时空光孤子的形成。结果表明，由于两个高能级形成动态斯塔克分裂和量子相消干涉效应，在探测场的吸收曲线中出现了双隧穿诱导透明（TIT）窗口。有趣的是，TIT窗口的宽度随着光控场强度的增加而变宽。我们还发现，通过相干控制该系统中的控制场和量子点间隧穿耦合，可以有效地调制探测场的克尔非线性效应。同时，我们证明了通过改变光控场的强度，可以实际调控暗孤子或亮孤子的形成。
