Investigation of the nonlinear optical rectification coefficient in a multilayered spherical quantum dot

Fakkahi, A.; Sali, A.; Jaouane, M.; Arraoui, R.; Ed-Dahmouny, A.

doi:10.1016/j.optmat.2022.112752

Cited by 20 publications

(3 citation statements)

References 49 publications

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“…In recent years, the growth and preparation technology of low-dimensional systems have developed rapidly, especially the emergence of metal-organic chemical vapor deposition and molecular beam epitaxy, which makes it possible to manufacture all kinds of low-dimensional semiconductor materials and quantum devices, and their physical properties (such as size and shape) can be controlled in experiments [1][2][3][4][5]. It is proved that QDs themselves have a quasi-zero-dimensional nanostructure, the electron is subject to localization in three spatial dimensions and are in discrete energy levels in QDs.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear optical properties of tunable spherical quantum dots under like-screened Kratzer potential

Wang,

Li,

Cai

et al. 2024

Phys. Scr.

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Using the effective mass approximation and the iterative procedure, we study the optical rectification (OR) coefficient of a spherical quantum dot (QD) system with like-screened Kratzer potential (LSKP), taking into account the influence of the confinement potential depth, quantum size and external environment. Our results show that the magnitude of the OR coefficient is strongly dependent on the magnitude of the tunable factor, whose peak value will be red-shifted or blue-shifted. Interestingly, the limiting potential depth and temperature have opposite effects on the OR coefficient in terms of peak location and size. Therefore, it is necessary to pay more attention to the influence of internal and external parameters on nonlinear optical effects, and apply the theory to practical experiments and the manufacture of optoelectronic devices.

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Section: Introductionmentioning

confidence: 99%

Nonlinear optical properties of tunable spherical quantum dots under like-screened Kratzer potential

Wang,

Li,

Cai

et al. 2024

Phys. Scr.

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“…The reader is invited to examine the book [1] for a more detailed discussion of such properties in the QRs. Furthermore, theoretical studies of the problem of the presence of the impurity or the external fields in quantum rings and quantum dots (QDs) show the possibility of controlling the optical and electronic properties in these systems [2][3][4][5][6][7][8][9][10][11][12][13][14][15]. The combined effect of the magnetic and electric fields on the impurity confined in InAs QRs has been investigated in [2].…”

Section: Introductionmentioning

confidence: 99%

Magnetic field effect on the linear and nonlinear refractive index and optical absorption of a donor in a GaAs quantum ring

El-Bakkari¹,

Iqraoun

Jaouane³

et al. 2023

Phys. Scr.

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The effects of the magnetic field (γ), the radial position of impurity and the degree of confinement on the oscillator strength (OS), refractive index (Δn⁄n_r ) and optical absorption (α) of an impurity inside a GaAs quantum ring (QR) are explored using the effective mass approximation and variational method. It is shown that the peak position of the optical absorption and the refractive index decrease and move toward the lower incident photon energy as the strength of the γ increases. In addition, it is found that the strongest α relates to the case when the impurity is positioned at the right side of QR in the presence of the magnetic field. Our examinations also show that the oscillator strength decreases as the γ increases especially for an on-center donor impurity.

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“…These properties introduce the great promise for applications in various photonics devices, such as the electroluminescent and laser emitters; luminescent sensors; luminescent indicators of the temperature, pH value; control systems of the intensity, radiation phase, etc. [1][2][3][4][5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Size effect in PbS Quantum Dots Luminescence

Grevtseva

Chevychelova

Ovchinnikov

et al. 2022

Preprint

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This paper presents new regularities of the size effect in IR luminescence of semiconductor colloidal PbS quantum dots, passivated with thioglycolic acid molecules (PbS/TGA QDs). It was found that decrease in the average PbS/TGA QDs size of the sample from 4.9 nm to 2.6 nm produces the luminescence peak shifts from 1350 nm to 865 nm. At that time, in the excitation spectrum the peak due to exciton absorption shifts from 1235 nm to 707 nm. The Stokes shift increases from 0.086 to 0.32 eV. The study of time-resolved luminescence showed that the luminescence decay is complex non-exponential it, that is determined by the statistical distribution of luminescence quenchers in PbS/TGA QDs over the ensemble. The complex of the obtained experimental results made it possible to conclude that the observed luminescence is determined by the radiative annihilation of exciton in PbS/TGA QDs.

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Investigation of the nonlinear optical rectification coefficient in a multilayered spherical quantum dot

Cited by 20 publications

References 49 publications

Nonlinear optical properties of tunable spherical quantum dots under like-screened Kratzer potential

Nonlinear optical properties of tunable spherical quantum dots under like-screened Kratzer potential

Magnetic field effect on the linear and nonlinear refractive index and optical absorption of a donor in a GaAs quantum ring

Size effect in PbS Quantum Dots Luminescence

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