Linear and nonlinear optical absorption coefficients and refractive index changes of a spherical quantum dot placed at the center of a cylindrical nano-wire: Effects of hydrostatic pressure and temperature

Farkoush, B. Akbarnavaz; Safarpour, Gh.; Zamani, Ali

doi:10.1016/j.spmi.2013.03.024

Cited by 37 publications

(4 citation statements)

References 43 publications

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“…This outcome is in agreement with Ref. [33]. However, in contrast to the 𝑃 effect, the amplitude of the resonant peaks of the ACs increases with increasing 𝑇 from 0 to 500 𝐾 as shown in Fig.…”

Section: Resultssupporting

confidence: 93%

“…In addition, for a fixed value of T, if the hydrostatic pressure rises, the reverse happens and the 𝑀 12 decreases. This kind of outcome has also been described in different geometries by some authors [33][34][35]. The reduction in the dipole matrix element with respect to pressure (P) can be explained by the decrease in the area where the electron is localized in our system.…”

Section: Resultssupporting

confidence: 75%

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The nonlinear optical properties of self-assembled InAs/GaAs quantum dot under effect of temperature and hydrostatic pressure

Jaouane

El-Bakkari

et al. 2023

Preprint

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In this study, we have scrutinized the influences of the temperature \(\left(T\right)\) and hydrostatic pressure \(\left(P\right)\) on the nonlinear and linear optical properties of a core/shell quantum dot (QD) system with Screened Modified Kratzer potential (SMKP). To realize this goal, we have examined the energy levels and their associated wave functions using the diagonalization method within the effective mass approximation. Analytical terms for absorption coefficients (ACs) and relative refractive index changes (RRICs) are exploited by means of the density matrix approach. The numerical outcomes are offered for typical InAs/GaAs core/shell QD system. The dependency of SMKP, dipole transition matrix element and electron energies of the ground (\(1s\)) and first excited state (\(1p\)) on the \(P\) and \(T\) that are varied over a range. Obtained numerical calculation results revealed that the \(P\) and \(T\) impacts the magnitude and position of the resonant peaks that characterize the ACs and RRICs.

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Section: Resultssupporting

confidence: 93%

Section: Resultssupporting

confidence: 75%

The nonlinear optical properties of self-assembled InAs/GaAs quantum dot under effect of temperature and hydrostatic pressure

Jaouane

El-Bakkari

et al. 2023

Preprint

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“…We shall assume that the impurity is placed at the center of the MLQD. The linear α (1) (ω) and the third-order nonlinear α (3) (ω, I) optical absorption coefficients (ACs) are given by [45][46][47][48][49] α (1) (ω…”

Section: Gaas Gaalasmentioning

confidence: 99%

Hydrostatic pressure and temperature effects on the binding energy and optical absorption of a multilayered quantum dot with a parabolic confinement

Ortakaya

Kirak

2016

Chinese Phys. B

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The influence of hydrostatic pressure, temperature, and impurity on the electronic and optical properties of spherical core/shell/well/shell (CSWS) nanostructure with parabolic confinement potential is investigated theoretically. The energy levels and wave functions of the structure are calculated by using shooting method within the effective-mass approximation. The numerical results show that the ground state donor binding energy as a function layer thickness very sensitively depends on the magnitude of pressure and temperature. Also, we investigate the probability distributions to understand clearly electronic properties. The obtained results show that the existence of the pressure and temperature has great influence on the electronic and optical properties.

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“…The study of quantum heterostructures has had a special place in research since its discovery due to its relevance in different technologies and fields [1][2][3][4][5][6][7][8][9][10]. Quantum heterostructures' response to external fields is an area of increasing interest as these external fields include pressure, temperature, electric fields, magnetic fields, laser fields, etc [11][12][13][14][15] are the tools to manipulate the optoelectronic properties and amend them to our advantage. We can exploit these electronic and optical properties as per the requirements of the optoelectronic device by tuning these parameters.…”

Section: Introductionmentioning

confidence: 99%

Optical properties of donor impurity in Yukawa like potential: application to SiGe/Si and Si/SiGe

et al. 2023

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We have investigated the effect of temperature and geometrical confinement on the behavior of spherical cavitieswith Yukawa potential presence inside the cavity within effective mass approximation. Using the Finite-element method, we have calculated the energy eigenvalue with the geometric and temperature effects into consideration with consideration of temperature and position dependent mass and position dependent dielectric constant. The optical transition from the ground to the excited state shows a blueshift in optical absorption coefficient, refractive index changes, second and third harmonic generation with an increase in temperature. The increase in the geometric size of the spherical cavity causes the redshift in the optical resonance peaks.

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Linear and nonlinear optical absorption coefficients and refractive index changes of a spherical quantum dot placed at the center of a cylindrical nano-wire: Effects of hydrostatic pressure and temperature

Cited by 37 publications

References 43 publications

The nonlinear optical properties of self-assembled InAs/GaAs quantum dot under effect of temperature and hydrostatic pressure

The nonlinear optical properties of self-assembled InAs/GaAs quantum dot under effect of temperature and hydrostatic pressure

Hydrostatic pressure and temperature effects on the binding energy and optical absorption of a multilayered quantum dot with a parabolic confinement

Optical properties of donor impurity in Yukawa like potential: application to SiGe/Si and Si/SiGe

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