Tailoring of the nonlinear optical rectification in vertically and laterally coupled InxGa1-xAs/GaAs quantum dots for Tera-hertz applications: Under In/Ga inter-diffusion, indium segregation, and strains effects

Makhlouf, D.; Benzerroug, N.; Choubani, M.

doi:10.1016/j.rinp.2023.106457

Cited by 2 publications

(1 citation statement)

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“…Sargsian et al [29] studied cylindrical VCQDs built from InAs in a GaAs matrix under the effect of an intense laser field and calculated the absorption coefficient, the refractive index changes, and second-and third-harmonic generation at different temperatures and laser field parameters. Makhlouf et al [30] addressed the problem of calculating the nonlinear optical rectification for two vertically coupled layers of In x Ga 1−x As/GaAs, including lateral interaction with neighbor QDs. Their findings show that indium segregation into the wetting layer affects the optical response significantly.…”

Section: Introductionmentioning

confidence: 99%

Electric and Magnetic Fields Effects in Vertically Coupled GaAs/AlxGa1−xAs Conical Quantum Dots

et al. 2023

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Vertically coupled quantum dots have emerged as promising structures for various applications such as single photon sources, entangled quantum pairs, quantum computation, and quantum cryptography. We start with a structure composed of two vertically coupled GaAs conical quantum dots surrounded by AlxGa1−x, and the effects of the applied electric and magnetic fields on the energies are evaluated using the finite element method. In addition, the effects are evaluated by including the presence of a shallow-donor impurity. The electron binding energy behavior is analyzed, and the effects on the photoionization cross-section are studied. Calculations are carried out in the effective mass and parabolic conduction band approximations. Our results show a notable dependence on the electric and magnetic fields applied to the photoionization cross-section. In general, it has been observed that both the electric and magnetic fields are useful parameters for inducing blueshifts of the resonant photoionization cross-section structure, which is accompanied by a drop in its magnitude.

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Section: Introductionmentioning

confidence: 99%