The multilayered spherical quantum dot under a magnetic field

Boz, F.K.; Aktaş, Ş.; Bilekkaya, A.; Okan, S.E.

doi:10.1016/j.apsusc.2010.01.036

Cited by 65 publications

(21 citation statements)

References 36 publications

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“…QDs are also renowned for displaying unique properties such as tunability and a broad color spectrum. In view of the tremendous applications of LDSSs in microelectronics and optoelectronics, we find a rich literature dealing with LDSSs [ 1–12 ] with special stress on their NLO properties. [ 1,2,7,13–32 ]…”

Section: Introductionmentioning

confidence: 99%

Adiabatic Switching Among Quantum Dot Eigenstates: Role of Anharmonicity and Gaussian White Noise

Roy¹,

Arif

Ghosh

2021

Physica Status Solidi (b)

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Current study inquires the time‐dependent quantum adiabatic switching (TDQAS) among the quantum dot (QD) eigenstates under the aegis of Gaussian white noise (GWN) with special emphasis on anharmonicity that may be present in the QD potential. The initial and the final eigenstates are distinguished by different values of magnetic field strength, confinement potential, anisotropy, and anharmonicity. The QAS has been conducted using four different switching functions (SFs), e.g., square, exponential, sinusoidal, and logarithmic. The time development of switching has been monitored with the help of overlap function and quantum information entropy (QIE). The SFs appear to recover the eigenstates of QD corresponding to the final Hamiltonian. The switching paths comprise features such as enhancement, depletion, maximization, minimization, and crossover of the overlap function and entropy. These characteristics of switching paths depend on presence/absence of noise, its pathway of application (additive/multiplicative), and symmetry (odd/even) of the anharmonic potential. The dependence on the type of SF used, however, has been found to be not much significant unless the exclusive role of noise strength on switching path is observed. The study merits importance in view of immense technological applications of QD‐based systems where the noise‐anharmonicity interplay may be exploited to a great extent.

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Section: Introductionmentioning

confidence: 99%

Adiabatic Switching Among Quantum Dot Eigenstates: Role of Anharmonicity and Gaussian White Noise

Roy¹,

Arif

Ghosh

2021

Physica Status Solidi (b)

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“…Electric field ( F ) and magnetic field ( B ) are two prominent physical quantities which are well known for providing valuable information on LDSS. The incorporation of F and B , in effect, alters the effective confinement potential of LDSS.…”

Section: Introductionmentioning

confidence: 99%

Profiles of Static Quadrupole Polarizability of Impurity‐Doped Quantum Dots Driven by Gaussian White Noise

Ghosh

Arif

Bera

et al. 2020

Physica Status Solidi (b)

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Herein, the influence of Gaussian white noise on static quadrupole polarizability (SQP) of the impurity‐doped quantum dots (QDs) is studied. The SQP profiles are critically analyzed as several physical quantities are varied over a range in the absence and presence of noise. The introduction of noise to the system is accomplished via two different routes viz. “additive” and “multiplicative.” SQP profiles consist of noticeable features like maximization, minimization, and saturation in the absence of noise and presence of additive noise. However, on most occasions, the SQP profile becomes devoid of any noticeable characteristics in the presence of multiplicative noise. The multiplicative noise plays some noticeable role only during the direct variation in confinement energy. Herein, the exclusive role of additive noise having strength around a typical value for the generation of large SQP is highlighted. The findings bear mentionable importance on the nonlinear optical properties of QD‐based devices under the aegis of noise.

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“…10 Therefore, the recent years have witnessed an intensive study of the electronic properties of the MLQD structures in the literature. [11][12][13][14][15][16] For example Boz et al 17 are studied the hydrogenic binding energies of a spherical MLQD by using a fourth-order RungeKutta method. Their results indicate that the binding energies of a MLQD exhibit di®erent behavior in comparison with those of single spherical QDs.…”

Section: Introductionmentioning

confidence: 99%

Size-dependent electronic and optical properties in zinc-blende InGaN/GaN multilayer spherical quantum dot

Ortakaya

Kirak

Güldeste

2017

J. Nonlinear Optic. Phys. Mat.

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A theoretical investigation of the binding energy, the radial probability distribution and optical properties (absorption coe±cient (AC) and refractive index change (RIC)) of InGaN/GaN multilayer quantum dot (QD) is presented. The calculations are performed within the e®ective-mass approximation. A shooting method is presented to obtain numerical values for the eigenvalues and eigenfunctions of the structure. The energy eigenvalue, density of probability and optical absorption are compared for cases without and with impurity. It is also found that the ACs and RICs exhibit blue or redshift with di®erent structure of potential pro¯le. The results indicate that the optical properties can be sensitively adjusted by geometry of structure and the presence of impurity.

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The multilayered spherical quantum dot under a magnetic field

Cited by 65 publications

References 36 publications

Adiabatic Switching Among Quantum Dot Eigenstates: Role of Anharmonicity and Gaussian White Noise

Adiabatic Switching Among Quantum Dot Eigenstates: Role of Anharmonicity and Gaussian White Noise

Profiles of Static Quadrupole Polarizability of Impurity‐Doped Quantum Dots Driven by Gaussian White Noise

Size-dependent electronic and optical properties in zinc-blende InGaN/GaN multilayer spherical quantum dot

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