Quantum Confined Stark Effect on the Linear and Nonlinear Optical Properties of SiGe/Si Semi Oblate and Prolate Quantum Dots Grown in Si Wetting Layer

Varsha,; Kria, M.; Hamdaoui, Jawad El; Pérez, Laura M.; Prasad, Vinod; El-Yadri, M.; Laroze, David; Feddi, E.

doi:10.3390/nano11061513

Cited by 16 publications

(11 citation statements)

References 65 publications

(77 reference statements)

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“…The effective mass of electron for Si, along longitudinal (m l ) is 0.92m 0 and along transverse (m t ) is equal to 0.19m 0 and for Ge, m l = 1.64m 0 and m t = 0.082m 0 . The dielectric strength as a composition of x is given by ò(x) = 11.9(1 + 0.35 x) [27,43,44].…”

Section: Theorymentioning

confidence: 99%

“…Another way is to make changes in the shape and size of the heterostructure [16][17][18][19][20][21][22][23] but these fabrication techniques are expensive and time-consuming so these external fields come in handy. In the literature, several studies are devoted to this field, a few of which are given in references [24][25][26][27]. In 1998, Perlin et al [28] used probes like pressure, temperature, and excitation power to study InGaN/GaN quantum wells.…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Theorymentioning

confidence: 99%

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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“…The electron and hole are pushed back, reducing the Coulomb force of attraction and increasing the energy of the electron-hole pair. As a result, the demand for non-linear crystals is increasing [5]. The study of optical behaviour in the presence of the electric field provides insight into the crystal controllability.…”

Section: Introductionmentioning

confidence: 99%

“…The second harmonic generation was first reported experimentally by [10]. Since then, there were a plethora of simulation studies on these properties including different structures [5,11,12], and different potentials such as parabolic [14], semi-parabolic [13]. To the best of our knowledge, the work done on the study of non-linear optical properties, particularly for finite square well potential was not sufficient.…”

Section: Introductionmentioning

confidence: 99%

A study of confined Stark effect, hydrostatic pressure and temperature on nonlinear optical properties in 1D GaxAl1-xAs/GaAs/GaxAl1-xAs quantum dots under a finite square well potential

Chaurasiya¹,

Dahiya²,

Sharma³

2023

Nanosystems: Phys. Chem. Math.

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In the present paper, investigations of nonlinear optical rectification, absorption coefficient and refractive index in a 1D Ga x Al 1−x As/GaAs/Ga x Al 1−x As quantum dots under a finite square well potential using simulation software such as COMSOL Multi-Physics and Matlab have been carried out in the presence of electric field, hydrostatic pressure and temperature. Results show that the resonant peaks of ORC (optical rectification coefficient) exhibit a blue shift under increasing of the electric field, while a red shift trailed by a blue shift is displayed under increasing of hydrostatic pressure and temperature. Similar trends take place for the refractive index as well as for the absorption coefficient under changing of the electric field, temperature and hydrostatic pressure. The attained theoretical results would pave a novel opportunity in designing, optimizing and applications of nonlinear opto-electronic devices by tuning the performance of the quantum dots and controlling some of their specific properties. KEYWORDS confined Stark effect, quantum dot, second harmonic generation, third harmonic generation FOR CITATION Chaurasiya R., Dahiya S., Sharma R. A study of confined Stark effect, hydrostatic pressure and temperature on nonlinear optical properties in 1D Ga x Al 1−x As/GaAs/Ga x Al 1−x As quantum dots under a finite square well potential.

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“…To obtain more information about optical properties, the readers can refer to refs. [25][26][27][28][29].…”

Section: Introductionmentioning

confidence: 99%

Second and third harmonic generation of asymmetrical Gaussian potential quantum dot

Ghanbari

Birooni

2022

Preprint

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In the current work, we have studied the second and third harmonic generation in asymmetrical Gaussian potential quantum dot subjected to the applied electric field. To do this, confined wave function together with energies of electron in an effective mass approximation framework were obtained. Apply these, the analytic expression for the second- and third harmonic generation are determined using a compact density matrix approach and an iterative procedure. According to the results, it is found that applying an electric field, enhances the peak values of the second- and third harmonic generation and redshifts the peak position of their spectrum. Our calculations indicate that increases the radius of quantum dot causes enhances the values of -harmonic generation and redshifts the peak positions of photon energy. It means by optimizing the confinement potential, the maximum –harmonic generation can be obtained. It should be noted that the structural parameters have a significant effect on the –harmonic generation in the considered system.

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Quantum Confined Stark Effect on the Linear and Nonlinear Optical Properties of SiGe/Si Semi Oblate and Prolate Quantum Dots Grown in Si Wetting Layer

Cited by 16 publications

References 65 publications

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

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

A study of confined Stark effect, hydrostatic pressure and temperature on nonlinear optical properties in 1D GaxAl1-xAs/GaAs/GaxAl1-xAs quantum dots under a finite square well potential

Second and third harmonic generation of asymmetrical Gaussian potential quantum dot

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