Second-order nonlinearity in ladder-plus-Y configuration in double quantum dot structure

Akram, Haneen; Al-Khursan, Amin H.

doi:10.1364/ao.55.009866

Cited by 22 publications

(6 citation statements)

References 22 publications

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“…This work uses our laboratory software (MAOUD-37) written under MATLAB. It is checked with experimental results in 36 and used in many publications that deal with optical properties like 34,35,37,38 . Some of them deal with plasmonic nanostructures [39][40][41] .…”

Section: Resultsmentioning

confidence: 99%

Energy absorbed from double quantum dot-metal nanoparticle hybrid system

Akram

Abdullah

Al-Khursan

2022

Sci Rep

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This work proposes the double quantum dot (DQD)-metal nanoparticle (MNP) hybrid system for a high energy absorption rate. The structure is modeled using density matrix equations that consider the interaction between excitons and surface plasmons. The wetting layer (WL)-DQD transitions are considered, and the orthogonalized plane wave (OPW) between these transitions is considered. The DQD energy states and momentum calculations with OPW are the figure of merit recognizing this DQD-MNP work. The results show that at the high pump and probe application, the total absorption rate $$({Q}_{tot})$$ ( Q tot ) of the DQD-MNP hybrid system is increased by reducing the distance between DQD-MNP. The high $${Q}_{tot}$$ Q tot obtained may relate to two reasons: first, the WL washes out modes other than the condensated main mode. Second, the high flexibility of manipulating DQD states compared to QD states results in more optical properties for DQD. The $${Q}_{DQD}$$ Q DQD is increased at a small MNP radius on the contrary to the $${Q}_{MNP}$$ Q MNP which is increased at a wider MNP radius. Under high tunneling, a broader blue shift in the $${Q}_{tot}$$ Q tot due to the destructive interference between fields is seen and the synchronization between $${Q}_{MNP}$$ Q MNP and $${Q}_{DQD}$$ Q DQD is destroyed. $${Q}_{tot}$$ Q tot for the DQD-MNP is increased by six orders while $${Q}_{DQD}$$ Q DQD is by eight orders compared to the single QD-MNP hybrid system. The high absorption rate of the DQD-MNP hybrid system comes from the transition possibilities and flexibility of choosing the transitions in the DQD system, which strengthens the transitions and increases the linear and nonlinear optical properties. This will make the DQD-MNP hybrid systems preferable to QD-MNP systems.

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Section: Resultsmentioning

confidence: 99%

Energy absorbed from double quantum dot-metal nanoparticle hybrid system

Akram

Abdullah

Al-Khursan

2022

Sci Rep

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“…Ladder-plus-Y DQD structure, see Figure 1, contains |0>,|1>,|2>,|3>, and |4> subbands, as in previous works, 24–26 with transitions can be classified into two subsystems. The first subsystem contains |0>, |1>,|2>,|3>, and |4> subbands, with the |0>→ |1> transition (∑ w 01 energy); besides |1>→|2> transition (∑ w 12 energy),|1>→|3>, transition (∑ w 13 energy), finally the |3>→|4> transition (∑ w 34 energy).…”

Section: Ladder Plus Y-type In Dqd Systemmentioning

confidence: 88%

“…, and |4 . subbands, as in previous works, [24][25][26] with transitions can be classified into two subsystems. The first subsystem contains |0 .…”

Section: Ladder Plus Y-type In Dqd Systemmentioning

confidence: 96%

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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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“…These nanocrystals have interesting characteristics, such as high gain, making them of considerably applicable in different fields. For three decades, they cover applications such as high modulation bandwidth applications, low noise, high nonlinearity, quantum computer, and so on [8,9].…”

Section: Introductionmentioning

confidence: 99%

Plasmonic Quantum Dot Nanocavity Laser: Hybrid Modes

2020

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The hybrid modes in the plasmonic quantum dot (QD) laser are modeled using the Marctili method. The model is then used to study the mode characteristics. The modes are going to cutoff point at zero propagation constant, while it goes to surface plasmon polaritons (SPPs) mode at higher photon energy. This behavior was different from that of waveguide modes shown in the dielectric waveguide. At plasmon resonance, hybrid mode is exactly one mode: surface plasmon polariton mode (perfect electric conductor).

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Second-order nonlinearity in ladder-plus-Y configuration in double quantum dot structure

Cited by 22 publications

References 22 publications

Energy absorbed from double quantum dot-metal nanoparticle hybrid system

Energy absorbed from double quantum dot-metal nanoparticle hybrid system

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

Plasmonic Quantum Dot Nanocavity Laser: Hybrid Modes

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