Electromagnetically induced transparency in double quantum dot under intense laser and magnetic fields: from Λ to Ξ configuration

Bejan, D.

doi:10.1140/epjb/e2017-70738-y

Cited by 14 publications

(8 citation statements)

References 41 publications

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“…where If, however, γ 31 = γ 21 as they were taken in many theoretical papers [30][31][32][33][34][35][36][37][38][39][40], we obtain Γ = γ 21 , Ω ref = 0. Therefore ∆ ± p = iγ 21 ± Ω c and equation ( 17) can be written as:…”

Section: Transparency Induced Through Autler-townes Splittingmentioning

confidence: 99%

“…Here µ 13 and µ 23 are the dipole moment matrix elements associated with the transition driven by the probe laser and the control laser, respectively. The Hamiltonian of the Ξ-system interacting with the applied laser pulses is [38]:…”

Section: Appendix Amentioning

confidence: 99%

“…In semiconductor nanostructures, EIT has been experimentally demonstrated in quantum wells [22][23][24][25][26][27] and InGaAs quantum dots [28,29]. Many theoretical papers investigated EIT occurrence in quantum wells [30,31], dots [32][33][34][35][36][37][38] and rings [39][40][41]. However, these theoretical studies treated on the influence of the external fields, temperature and pressure on the transparency window making no difference between EIT and ATS regimes, even though they worked with a rather strong coupling field.…”

Section: Introductionmentioning

confidence: 99%

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Magnetic field controlled induced transparency by Autler–Townes splitting in pseudo-elliptic quantum ring

2019

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We theoretically investigated the effects of magnetic field and of the parameters of control and probe lasers on the transparency induced through Autler-Townes splitting (ATS) in GaAs/GaAlAs pseudo-elliptic quantum ring. We showed that if equal decay rates are considered the investigation of the electromagnetically induced transparency phenomenon can be done only in the strong coupling regime. Our study reveals that the quantum system is in a Λ configuration in the absence of external fields but, in the presence of the magnetic field, it may present simultaneously many configurations (of Λ, Ξ and V type) that allow the occurrence of transparency, separated by very narrow regions of magnetic fields where no configuration is active. The magnetic field determines almost periodically the switch between configurations. We demonstrated that in V (Ξ) configurations the ATS requires the greatest (lowest) intensity of the control laser and of the energy of the probe laser.

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Section: Transparency Induced Through Autler-townes Splittingmentioning

confidence: 99%

Section: Appendix Amentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Magnetic field controlled induced transparency by Autler–Townes splitting in pseudo-elliptic quantum ring

2019

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“…Parameter values used in our computations correspond to GaAs devices where λ = 2, m * = 0.067m e , ε r = 12.65 [9,10,50,51,52] and we use the Hartree atomic units defined by = e = m e = 4πε 0 = 1. For the energy numerical values, we have ω 0 ≈ 0.1 ∼ 1eV [9,10,51,53] and this means that the energies of the levels considered in our work (n = 1&2 and m = 0&1) are in the intervals 0.5 to 0.8eV or 5 to 8eV depending on the value of ω 0 . For D, we choose them in the range 1 to 10a.u.…”

Section: Applications To 2d Quantum Ringsmentioning

confidence: 99%

Exact Solutions for a Quantum Ring with a Dipolar Impurity

Baazouzi,

Moumni,

Falek

2020

Preprint

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We study analytically the Schrödinger equation for a system made up of a quantum ring with a dipolar impurity under the effect an Aharonov-Bohm field and we choose the pseudoharmonic oscillator as a confinement potential. We calculate the exact values of the energies and we also get the exact expressions of the wave functions. We study the effects of the dipole moment of the impurity on the energies of the levels as well as on those of the transitions and this for different materials.

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“…Many researchers studied the effects of size, hydrogenic impurity, pressure, temperature and external fields on the electronic structure and optical properties of cylindrical, spherical, ellipsoidal, pyramid and cone-like QDs . Bejan investigated the influence of intense laser and magnetic fields on electromagnetically induced transparency of an asymmetric GaAs/AlGaAs double QD [33]. Using the shooting method in the effective mass approximation, Taş and S ¸ahin [34] studied Hydrogenic impurity effects on electronic structure of core/shell/well/shell multilayered spherical QD.…”

Section: Introductionmentioning

confidence: 99%

Finite difference time domain simulation of arbitrary shapes quantum dots

et al. 2019

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Utilizing the finite difference time domain (FDTD) method, energy eigenvalues of spherical, cylindrical, pyramidal and cone-like quantum dots are calculated. To do this, by the imaginary time transformation, we transform the schrödinger equation into a diffusion equation. Then, the FDTD algorithm is hired to solve this equation. We calculate four lowest energy eigenvalues of these QDs and then compared the simulation results with analytical ones. Our results clearly show that simulation results are in very good agreement with analytical results. Therefore, we can use the FDTD method to find accurate results for the Schrödinger equation.

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Electromagnetically induced transparency in double quantum dot under intense laser and magnetic fields: from Λ to Ξ configuration

Cited by 14 publications

References 41 publications

Magnetic field controlled induced transparency by Autler–Townes splitting in pseudo-elliptic quantum ring

Magnetic field controlled induced transparency by Autler–Townes splitting in pseudo-elliptic quantum ring

Exact Solutions for a Quantum Ring with a Dipolar Impurity

Finite difference time domain simulation of arbitrary shapes quantum dots

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