Giant gain from spontaneously generated coherence in Y-type double quantum dot structure

Al-Nashy, B.; Razzaghi, Sonia; Al-Musawi, Muwaffaq Abdullah; Saghai, H. Rasooli; Al-Khursan, Amin H.

doi:10.1016/j.rinp.2017.06.018

Cited by 12 publications

(6 citation statements)

References 22 publications

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“…As in the real part calculations, the behavior was inverted and the peaks were reduced by more than one order when WL was neglected. The gain obtained here was higher than that obtained in Al-Nashy et al 22 by three orders. The work in Al-Nashy et al 22 studies SGC in DQD structure without WL.…”

Section: Resultscontrasting

confidence: 78%

“…The gain obtained here was higher than that obtained in Al-Nashy et al 22 by three orders. The work in Al-Nashy et al 22 studies SGC in DQD structure without WL. The results of Figue 4 can be explained here depending on the conclusion in Al Husseini et al, 23 where inclusion of WL washing out the undesired modes due to its long capture time, which of course increases gain.…”

Section: Resultscontrasting

confidence: 78%

“…17 Y-configuration in DQD structure was proposed. 20,21 In the recent article, Al-Nashy et al 22 studies SGC in DQD Y-structure. Since QD structures are multilayered where they are formed by different layers (a two-dimensional wetting layer, WL, and a completely quantized QD layer), 23 thus it is important to include the effect of WL in the simulation of SGC.…”

Section: Introductionmentioning

confidence: 99%

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Spontaneously generated coherence in ladder-plus-Y double quantum dot system

Al-Nashy

Jasim

Al-Shatravi

et al. 2019

Proceedings of the Institution of Mechanical Engineers, Part N:

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A model was presented for linear susceptibility in ladder-plus-Y configuration of double quantum dot system using density matrix theory and including spontaneously generated coherence of Λ-type system. Wetting layer and quantum dot inhomogeneity were considered in the calculations, which gives a practical description of double quantum dot structures well. With increasing spontaneously generated coherence from Λ-component, the dispersion was increased and shifted under spontaneously generated coherence. The inclusion of wetting layer under spontaneously generated coherence increases gain which coincides with the published results. A possibility of slow light was predicted.

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Section: Resultscontrasting

confidence: 78%

Section: Resultscontrasting

confidence: 78%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Spontaneously generated coherence in ladder-plus-Y double quantum dot system

Al-Nashy

Jasim

Al-Shatravi

et al. 2019

Proceedings of the Institution of Mechanical Engineers, Part N:

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“…In the subsequent years, the studies related to EIT have produced a superior impact on optics research due to its potential applications in nonlinear and quantum optics like controlling group velocity 11 , quantum information processing and computing 12 , optical memory 13 , nonlinear photonic devices, optical buffers, etc. In recent years, the investigation of EIT governed absorption/dispersion has been extended in several semiconductor quantum dots and optical microcavities due to the formation of multiple transparent windows which can be used for the fabrication of novel photonic devices with multiple data transmission channels [14][15][16][17][18] .…”

Section: Introductionmentioning

confidence: 99%

“…The studies revealed that under the effect of SGC, the absorption is much reduced and within the EIT window slope of the normal dispersion is steeper. These properties of SGC endow remarkable applications of pulse propagation from superluminal to subluminal regime 27 , giant Kerr nonlinearity with minimum absorption 28 , all-optical switching and solitonic pulse propagation with the development of optical communication 29,30 , entanglement 16 etc. In 2015, Chen et al 31 found the unique feature of the optical bistability to multistability via controlling the threshold strength of the SGC in asymmetric double quantum wells.…”

Section: Introductionmentioning

confidence: 99%

Controlling Behaviour of Transparency and Absorption in Three-Coupled Multiple Quantum Wells Via Spontaneously Generated Coherence

Mukherjee,

Hazra,

Borgohain

2023

Preprint

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This article presents a coherent phenomenon called spontaneously generated coherence (SGC) under the regime of electromagnetically induced transparency (EIT) in a three-coupled multiple quantum wells. We demonstrate that the presence of SGC in these quantum wells lead to intriguing modifications in the transparency window within the absorption spectrum. At the same time, modification of the dispersive nature is also demonstrated which enables the feasibility of the system in diverse applications based on light propagation. The absorption and dispersion responses are found to be varied by the individual strength of the first and second control fields in presence as well as in absence of SGC in the EIT regime. The positional shifting of the transparency window and simultaneous modifications in the dispersive profiles by tuning the control field detunings of both the first and second control fields are also revealed. Some absorption and dispersion contours are illustrated for getting better insights into the modifications of the optical responses via SGC. Finally, by manipulating the strength of the SGC parameter, we observe the changes in the respective position of the transparency window and dispersion curve. It is expected that the current investigations will pave novel ways for innovative applications in quantum communications, and fabrication of advanced photonic devices.

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