Controllable double tunneling induced transparency and solitons formation in a quantum dot molecule

Abstract

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.

Enhancement of four-wave mixing process in a four-level double semiconductor quantum well

“…where In order to describe the propagation characteristics of the generated FWM, the motion equations must be simultaneously solved with Maxwell's equation in a self-consistent manner. [31] Under a slowly varying envelope approximation, we obtain…”

Adjusting amplitude of the stored optical solitons by inter-dot tunneling coupling in triple quantum dot molecules

“…[36,37] This is similar to the EIT effect in a three-level ultra-cold atomic medium. She et al [38] studied the linear optical and Kerr nonlinear properties of double QD system. They found that there exist two transparent windows and the type of the optical soliton can also be controlled by changing the intensity of the control field.…”

Controllable fast light in quantum dot molecules assisted hybrid optomechanical system

“…Motivated by the previous researches in which optomechanical systems are coupled with different objects like membranes, atoms [27], and many interesting phenomena in QDMs [28,29] are studied, we consider in this paper, an optomechanical system with a Fabry-perot cavity consisting of a mechanical resonator and three-level QDMs. Two output fields are introduced in the cavity with different frequency, where the one field provides the tunneling strength in the QDMs.…”