Magnetic field effects on oscillator strength, dipole polarizability and refractive index changes in spherical quantum dot

Yakar, Yusuf; Çakır, Bekir; Özmen, Ayhan

doi:10.1016/j.cplett.2018.08.010

Cited by 39 publications

(17 citation statements)

References 72 publications

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“…Technologically, QDs have many potential applications in microelectronic and optoelectronic devices. In this respect, by employing different approaches and potential shapes, many researchers have studied the electronic structure [2–5], binding energies [6–8], optical properties [9–15], electric and magnetic field effects [16–25], and other physical properties [26–30] of single electron QDs. As well known, it is easy to obtain analytical solutions for single electron QDs.…”

Section: Introductionmentioning

confidence: 99%

Energy states, oscillator strengths and polarizabilities of many electron atoms confined by an impenetrable spherical cavity

Yakar

Çakır

Demir

et al. 2021

Int J of Quantum Chemistry

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We have calculated the ground and excited state energies and the orbital energies of three-electron atoms inside impenetrable spherical cavity. Energy eigenvalues and wavefunctions are calculated from the variational approximation method which is a combination of quantum genetic algorithm procedure and Hartree-Fock Roothaan method. In addition, the important parameters such as static and dynamic polarizability, oscillator strength and pressure have been investigated as perturbative. The results reveal that cavity radius and impurity charge have played an important role on the polarizability, the oscillator strength and pressure of the system. In addition, it is seen that when cavity radius is extremely large, all energies and the other physical parameters approach the values of a free space atom. As the dot radius decreases, the polarizability of system decreases due to the strong spatial confinement, but the pressure exerting on the system as the cavity radius R is shrunk increases. In addition, as the impurity charge increases, the oscillator strength decreases.

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Section: Introductionmentioning

confidence: 99%

Energy states, oscillator strengths and polarizabilities of many electron atoms confined by an impenetrable spherical cavity

Yakar

Çakır

Demir

et al. 2021

Int J of Quantum Chemistry

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“…The need for understanding the electronic magnetism in nanoscale structures along with realization of appealing physics has accentuated studies on magnetic properties of LDSS [32][33][34][35][36][37][38][39].…”

Section: Introductionmentioning

confidence: 99%

Magnetic susceptibility of doped quantum dots: interplay between binding energy and noise

2020

Biointerface Res Appl Chem

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Current work focuses on realizing how the interaction between binding energy(BE) and noise influences the magnetic susceptibility(χ) of doped GaAs quantum dot (QD). The system is exposed to Gaussian white noise and the dopant is also characterized by a Gaussian function. The work also highlights the role of the pathway via which noise may operate in the system. We have found that it is the multiplicative noise that alters the χ profile significantly from that of a noise-free atmosphere. However, additive noise does not change the χ profile from that under noise-free state to any meaningful size. Often multiplicative noise induces paramagnetism in the system which otherwise shows diamagnetism. And the noise-BE interplay prominently determines the extent of diamagnetism displayed by the system.

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“…of QDs. This fact makes QD a highly renowned object that can be subjected to prolific technological applications in microelectronic and optoelectronic devices such as LEDs, high‐speed optical and electro‐optical modulators, solar cells, far‐IR photodetectors, laser amplifiers (

λ \approx 10 μ m

), interband lasers, and intersubband long‐wavelength detectors …”

Section: Introductionmentioning

confidence: 99%

“…The incorporation of F and B , in effect, alters the effective confinement potential of LDSS. This, in turn, changes the symmetry of the impurity states and the nature of the wave functions . Therefore, the binding energy (BE) and optical properties of impurity energy states are noticeably modified.…”

Section: Introductionmentioning

confidence: 99%

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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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Magnetic field effects on oscillator strength, dipole polarizability and refractive index changes in spherical quantum dot

Cited by 39 publications

References 72 publications

Energy states, oscillator strengths and polarizabilities of many electron atoms confined by an impenetrable spherical cavity

Energy states, oscillator strengths and polarizabilities of many electron atoms confined by an impenetrable spherical cavity

Magnetic susceptibility of doped quantum dots: interplay between binding energy and noise

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

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