Negative refraction in the double quantum dot system

Al-Toki, Hussein G.; Al-Khursan, Amin H.

doi:10.1007/s11082-020-02580-6

Cited by 21 publications

(20 citation statements)

References 40 publications

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“…As it deals with material properties, this work begins with the calculation of QD energy subbands and then the momenta of transitions to get the results of each structure depending on its specified parameters from the beginning. The WL effect, a quasi-continuum state, on the QD transitions is viewed through the orthogonalized plane wave (OPW), which is inevitable in the QD transitions 34 , 35 . Such calculations are the figure of merit recognizing this work.…”

Section: Resultsmentioning

confidence: 99%

“…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%

“…3,4,5,6,7,8) shows that Q tot and Q MNP are reduced by six orders while Q SQD is reduced by eight orders compared to their DQD-MNP counterpart. The high absorption rate of the DQD-MNP hybrid system comes from the transition possibilities of the DQD system, which strengthens the transitions and increases the linear and nonlinear optical properties and flexibility of choosing the transitions in the DQD system 35,38,47 . This will make the DQD-MNP hybrid system preferable to QD-MNP.…”

Section: Resultsmentioning

confidence: 99%

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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%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Energy absorbed from double quantum dot-metal nanoparticle hybrid system

Akram

Abdullah

Al-Khursan

2022

Sci Rep

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“…The QDs are considered in a quantum disk shape, and their energy subbands are calculated using the quantum disk model. This model is described well in [17, 24] and compared with the experiment [25].…”

Section: Gain Theory Related To Experimentsmentioning

confidence: 99%

InGaAsSb/GaAsSb quantum dot structures

Oleiwi

Al-Nashy

Ajeel

et al. 2023

Micro & Nano Letters

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“…Othman et al [14] demonstrated that a negative index of refraction can be achieved over a wide wavelength range with minimal absorption in a five-level atomic system. Very recently, Al-Toki et al [15] studied negative refractive index in a double quantum dot and obtained a high negative refractive index corresponding to neglected absorption under applied electric fields between quantum dot-quantum dot.…”

Section: Introductionmentioning

confidence: 99%

Negative Refractive Index in an Inhomogeneously Broadened Four-Level Inverted-Y Atomic Medium

Bang

Phu

et al. 2021

IEEE Photonics J.

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In this paper, we present the study on negative refractive index in an inhomogeneously broadened four-level inverted-Y atomic medium based on electromagnetically induced transparency (EIT). The expressions of the relative permittivity and the relative permeability are derived under Doppler broadening. For this four-level system, we have found two frequency bands of negative refractive index in an optical region corresponding to two EIT windows. The influences of coupling and signal laser fields as well as temperature on frequency bands of negative refractive index are investigated. Our research can be convenient for experimental implementation with real atomic media under different temperatures.

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Negative refraction in the double quantum dot system

Cited by 21 publications

References 40 publications

Energy absorbed from double quantum dot-metal nanoparticle hybrid system

Energy absorbed from double quantum dot-metal nanoparticle hybrid system

InGaAsSb/GaAsSb quantum dot structures

Negative Refractive Index in an Inhomogeneously Broadened Four-Level Inverted-Y Atomic Medium

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