Nonlinear optical properties of GaAs pyramidal quantum dots: Effects of elliptically polarized radiation, impurity, and magnetic applied fields

Niculescu, E.C.; Bejan, D.

doi:10.1016/j.physe.2015.06.022

Cited by 34 publications

(9 citation statements)

References 27 publications

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“…This case prompted researchers to investigate optical phenomena such as optical absorption [27,28], optical rectification [29][30][31], second and thirdorder harmonic generations [32][33][34] and refractive index changes [35][36][37]. Optical absorption coefficients (OACs) of QDs which including impurity have different confinement potentials have been previously studied by many authors [38][39][40][41][42][43][44][45][46][47][48][49][50]. Optical properties of QDs are investigated for: a cylindrical core-shell QD by Kria et al [38], the spherical sector-shaped QD by Mora-Ramos et al [39], a laser-driven two-dimensional disc-shaped QD by Kilic et al [40], a spherical QD by Stevanović et al [41], a typical ring-shaped elliptical QD by Ghajarpour and Karimi [42], core-shell ellipsoidal QDs by Shi and Yan [43], a mul-tilayer QD by Rahul et al [44], a lens-shaped QD with a finite confinement potential by Khordad et al [45], a parabolic QD by Hosseinpour et al [46], two QDs coupled laterally with a circular cross-sectional shape by Duque et al [47], a pyramidal QD by Niculescu and Bejan [48], a triangular two-dimensional QD by Kasapoglu et al [49], a QD with Woods-Saxon potential by Lu et al [50].…”

Section: Introductionmentioning

confidence: 99%

Binding Energy And Absorption of Donor Impurity In Spherical GaAs/AlxGa1-x As Quantum Dots With Konwent Potential

Kasapoğlu

Sarı

et al. 2021

Preprint

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In this study, the electronic and optical properties of single or core/shell quantum dots, which are formed depending on the parameters in the selected Konwent potential, are investigated. Namely, the effects of the size and geometric shapes of quantum dots on the binding energy of the on-center donor impurity, the total absorption coefficient and refractive index which are including transitions between the some confined states, and the electromagnetically induced transparency between the lowest six confined states related to the donor impurity are investigated. We have used the diagonalization method by choosing a wave function based on the Bessel and Spherical Harmonics orthonormal function to find the eigenvalues and eigenfunctions of the electron confined within the quantum dots which have different types mentioned above. To calculate the optical absorption coefficients and electromagnetically induced transparency related to shallow-donor impurity, a two- and three-level approach in the density matrix expansion is used, respectively.

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Section: Introductionmentioning

confidence: 99%

Binding Energy And Absorption of Donor Impurity In Spherical GaAs/AlxGa1-x As Quantum Dots With Konwent Potential

Kasapoğlu

Sarı

et al. 2021

Preprint

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“…LDSS possess special status for displaying enhanced NLO properties. Thus, the modulation of NLO properties of LDSS by impurity is quite interesting and accentuates rigorous research works [1], [2], [3], [4], [5], [6], [7], [8], [9], [10], [11], [12], [13], [14], [15], [16], [17], [18], [19], [20], [21], [22], [23], [24], [25], [26], [27], [28], [29], [30], [31], [32], [33], [34], [35], [36].…”

Section: Introductionmentioning

confidence: 99%

Influence of noise-binding energy interplay on the second and third-order nonlinear optical properties of impurity doped quantum dots

Ghosh¹,

Arif²,

Ghosh³

2019

Heliyon

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We inspect the role of binding energy (BE) on second-order and third-order nonlinear optical (NLO) properties of doped quantum dot (QD). In the study ample stress is given on understanding the role of noise on the manifestations of these NLO properties. The profiles of these NLO properties are analyzed mainly on the basis of variation of two important criteria viz. peak-shift and peak-height as a function of BE. Both these features depend on the presence of noise, its pathway (mode) of introduction and sometimes on the identity of the NLO properties. The findings of the study deem significance in realizing the binding energy-dependence of the said NLO properties of low-dimensional semiconductor materials when noise contribution becomes noticeable.

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“…Safsızlık kuantum nokta yapının enerji dağılımında önemli değişikliğe neden olmakta ve optiksel özelliklerinin kontrol edilmesine imkân sağlamaktadır. Bütün bu nedenlerden dolayı son 10 yılda çeşitli araştırmacılar tarafından kuantum nokta yapıların elektronik yapısı [2][3][4][5][6], bağlanma enerjisi [7][8][9][10], optiksel [11][12][13][14][15][16][17][18] ve diğer özellikleri [19][20][21][22] gibi çeşitli parametreleri yoğun olarak çalışılmaktadır. Yukarıda belirtilen çalışmalar arasında Çakır ve ark.…”

Section: Introductionunclassified

Electronic Structure and Binding Energy of Spherical Quantum Dot

Yilmazer

Yakar

Çakır

et al. 2017

Aksaray University Journal of Science and Engineering

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In this study, we have calculated the energy states and the wavefunctions of the spherical quantum dot with finite and infinite confining potential. In addition, we have investigated the binding energies of the ground and excited states of the spherical quantum dot as a function of dot radius. In order to calculate the energy eigenvalues and the wavefunctions Quantum Genetic Algorithm and Hartre-Fock Roothaan method have been employed. The results show that dot radius and confinement potential has a great effect on the energy states and binding energies.In large dot radii, the effect of confinement potential on energy states is disappeared and energy states go to the energy values of hydrogen atom. ÖzetBu çalışmada sonlu ve sonsuz sınırlandırıcı potansiyele sahip küresel kuantum nokta yapının taban ve bazı uyarılmış enerji seviyeleri ve dalga fonksiyonları hesaplandı. Bununla beraber taban ve çeşitli uyarılmış durumlarının bağlanma enerjileri nokta yapının yarıçapına bağlı olarak incelendi. Enerji öz değerlerini ve öz fonksiyonlarını hesaplamak için Kuantum Genetik Algoritma ve Hartree-Fock Roothaan metodu kullanılmıştır. Sonuçlar göstermiştir ki kuantum nokta yapının enerji seviyeleri üzerinde yarıçapın ve sınırlandırıcı potansiyelin büyük etkisi vardır. Buna karşılık büyük nokta yarıçaplarında sınırlandırıcı potansiyelin etkisinin ortadan kalktığı ve enerji seviyelerinin hidrojen atomunun değerlerine gittiği görüldü.

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Nonlinear optical properties of GaAs pyramidal quantum dots: Effects of elliptically polarized radiation, impurity, and magnetic applied fields

Cited by 34 publications

References 27 publications

Binding Energy And Absorption of Donor Impurity In Spherical GaAs/AlxGa1-x As Quantum Dots With Konwent Potential

Binding Energy And Absorption of Donor Impurity In Spherical GaAs/AlxGa1-x As Quantum Dots With Konwent Potential

Influence of noise-binding energy interplay on the second and third-order nonlinear optical properties of impurity doped quantum dots

Electronic Structure and Binding Energy of Spherical Quantum Dot

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