Superluminal optical soliton via resonant tunneling in coupled quantum dots

Xu, Xiaolong; Liu, J.; Yang, Xiaoxia

doi:10.1016/j.physe.2008.02.004

Cited by 34 publications

(10 citation statements)

References 56 publications

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“…For the double QD molecules, the quantum destructive interference caused by inter-dot tunneling coupling leads to the transparency of the medium, which is called as quantum inter-dot tunneling induced transparency (TIT). [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.…”

Section: Introductionsupporting

confidence: 62%

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

et al. 2023

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We study the propagation properties of a probe field in an aligned asymmetric triple quantum dot molecule with both sides inter-dot tunneling coupling effect. It is shown that the probe field can form optical soliton due to the destructive quantum interference induced by the quantum inter-dot tunneling coupling effect. Interestingly, these optical solitons can be stored and retrieved by adjusting single or double inter-dot tunneling coupling effect, different from that light memory in the ultra-cold atom system. Furthermore, we also find that the amplitude of the stored optical soliton can be adjusted by the strength of single or double inter-dot tunneling coupling. It is possibility to improve the stability and the fidelity of the optical information in the process of the storage and retrieval in semiconductor quantum dots devices.

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Section: Introductionsupporting

confidence: 62%

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

et al. 2023

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“…We are interested in the effect of inter-dot tunneling T A and T B and incoherent pumping field in the absorption of pulse propagation. In this case the coherence in the system is created by the coupling of two excited states via tunneling [42]. Note that in an atomic system the coherence can be created by the coupling laser field; here such coherence is created by tunneling effects.…”

Section: Resultsmentioning

confidence: 99%

Electrical and optical control of optical gain in a coupled triple quantum dot system operating in telecommunication window

Mehmannavaz¹,

Sattari²

2014

Laser Phys.

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We investigate the light amplification and gain without inversion (GWI) in triple quantum dot molecules in both steady-state and transient state. We demonstrate that the light amplification and GWI of a light pulse can be controlled through the rates of the incoherent pumping and tunneling between electronic levels. The required switching times for switching of a light pulse from absorption to gain and vice versa is then discussed. We obtain switching time at about 40 ps, which resembles a high-speed optical switch in nanostructure. The proposed approach in QDMs may provide some new possibilities for technological applications in optoelectronics and solid-state quantum information science.

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“…In such molecules, an external electric field allows us to control the confining potential and the number of electrons or holes, as well as their mutual interaction. Many studies have been done on optical properties of QD systems [35][36][37][38][39][40]. Wang et al [35] investigated the optical bistability of a Laser Physics…”

Section: Introductionmentioning

confidence: 99%

Behavior of optical bistability in multifold quantum dot molecules

Hamedi

Mehmannavaz

2015

Laser Phys.

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We analyze the optical bistability (OB) behavior in a multifold quantum dot (QD) molecule composed of five quantum dots controlled by the tunneling coupling. It is shown that the optical bistability can strongly be affected by the tunneling inter-dot coupling coefficients as well as detuning parameters. In addition, we find that the rate of an incoherent pump field has a leading role in modification of the OB threshold. We then generalize our analysis to the case of multifold quantum dot molecules where the number of the quantum dots is N (with a center dot and − N 1 satellite dots). We compare the OB features that could occur in a multifold QD system consist of three ( = N 3), four ( = N 4), and five (N = 5) quantum dots. We realize that the OB threshold increases as the number of satellite QDs increases. Such controllable optical bistability in multiple QD molecules may provide some new possibilities for technological applications in optoelectronics and solid-state quantum information science.

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Superluminal optical soliton via resonant tunneling in coupled quantum dots

Cited by 34 publications

References 56 publications

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

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

Electrical and optical control of optical gain in a coupled triple quantum dot system operating in telecommunication window

Behavior of optical bistability in multifold quantum dot molecules

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