Controllable double tunneling induced transparency and solitons formation in a quantum dot molecule.
Controllable double tunneling induced transparency and solitons formation in a quantum dot molecule.
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DOI：
10.1364/oe.21.017392
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发表时间：
2013-07
期刊：
影响因子：
3.8
通讯作者：
Y. She;Xuejun Zheng;Denglong Wang;Wei-xi Zhang
中科院分区：
文献类型：
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作者：
Y. She;Xuejun Zheng;Denglong Wang;Wei-xi Zhang
考虑量子点间隧穿耦合与外光控制场的耦合效应，解析地研究了量子点分子系统的线性光学性质和时间光孤子的形成。结果表明，由于两个上能级的动态Stark劈裂和量子相消干涉效应，在探测场的吸收曲线上出现了双隧穿诱导透明窗口。有趣的是，TIT窗口的宽度随着光控制场强度的增加而变宽。我们还发现，在该系统中，通过控制场和点间隧穿耦合的相干控制，可以有效地调制探测场的克尔非线性效应。同时，我们证明了暗孤子或亮孤子的形成可以通过改变光控制场的强度来实际调节。
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.