Finite element 3D model of a double quantum ring: effects of electric and laser fields on the interband transition

A Radu, C Stan, D Bejan - New Journal of Physics, 2023 - iopscience.iop.org
In this work, the changes in the energy of electrons and holes, oscillator strength and
interband transition time when external fields are applied to a GaAs/AlGaAs semiconductor …

Electronic and optical responses of laser dressed triple concentric quantum rings in electric field

D Bejan, A Radu, C Stan - Philosophical Magazine, 2023 - Taylor & Francis
In this paper, we theoretically studied a 3D structure of GaAs/Al0. 3Ga0. 7As triple concentric
quantum rings submitted to the combined action of a non-resonant intense laser and a static …

Enhanced polarization sensitivity and tunability in truncated pyramidal GaAs quantum dots for FIR applications

S **danate, P Sathongpaen, A Amthong - Materials Today Nano, 2024 - Elsevier
The far-infrared (FIR) spectrum, covering wavelengths from 20 to 1000 μ m, presents
significant challenges for the manipulation and detection of polarized light, especially in the …

[HTML][HTML] Geometry-Tuned Optical Absorption Spectra of the Coupled Quantum Dot–Double Quantum Ring Structure

D Bejan, C Stan - Nanomaterials, 2024 - mdpi.com
We investigate the energy spectra and optical absorption of a 3D quantum dot–double
quantum ring structure of GaAs/Al0. 3Ga0. 7As with adjustable geometrical parameters. In …

Double Quantum Ring under an Intense Nonresonant Laser Field: Zeeman and Spin-Orbit Interaction Effects

ME Mora-Ramos, JA Vinasco, A Radu, RL Restrepo… - Condensed …, 2023 - mdpi.com
We theoretically investigate the properties of an electron energy spectrum in a double GaAs-
Al0. 3Ga0. 7As quantum ring by using the effective mass and adiabatic approximations …

Elliptical Quantum Rings with Variable Heights and under Spin–Orbit Interactions

ME Mora-Ramos, JA Vinasco, A Radu, RL Restrepo… - Condensed …, 2023 - mdpi.com
We investigate the electronic properties of a semiconductor quantum ring with an elliptical
shape and non-uniform height, allowing for distributed quantum-dot-like bulges along its …

Deep learning neural network for approaching Schrödinger problems with arbitrary two-dimensional confinement

A Radu, CA Duque - Machine Learning: Science and Technology, 2023 - iopscience.iop.org
This article presents an approach to the two-dimensional Schrödinger equation based on
automatic learning methods with neural networks. It is intended to determine the ground …

The role of geometry in tailoring the linear and nonlinear optical properties of semiconductor quantum dots

GA Mantashian - Nanophotonics X, 2024 - spiedigitallibrary.org
The paper aims to reveal the relationship between the geometrical features and linear and
nonlinear optical properties of InAs Quantum Dots (QDs). This problem is justified by the …

Stationary States of an Electron in a Prolate Spheroidal Quantum Dot

MV Hayrapetyan, AZ Muradyan - Journal of Contemporary Physics …, 2024 - Springer
The stationary states of an electron in a nanosized semiconductor quantum dot of spheroidal
shape with a deep confining potential are considered. The discrete energy spectrum and …

Crossing Points in Spectra and Light Absorption in Spheroidal and Cone-Shaped Quantum Dots

VL Derbov, AA Gusev, O Chuluunbaatar, LL Hai… - Optics and Its …, 2022 - Springer
We briefly review the analysis of the energy spectrum, the envelope eigenfunctions of
electron, hole and exciton states, and the direct interband light absorption in cone-shaped …