Linear and nonlinear optical properties in spherical quantum dots: Modified Möbius squared potential

Onyenegecha, Chibueze P.

doi:10.1016/j.heliyon.2022.e10387

Cited by 10 publications

(3 citation statements)

References 46 publications

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“…Intraband optical properties have garnered significant interest due to their implications for novel optoelectronic devices. Studies have elucidated that the size, shape, and material composition of QDs play pivotal roles in dictating their intraband optical behaviors, such as absorption coefficients and energy level transitions [41][42][43][44][45][46] . For instance, heavily n-doped PbS colloidal QD solid-state films demonstrate a strong intraband absorption, which is as potent as their interband counterparts, showcasing a direct correlation between the QD size and the intraband energy transition span 41 .…”

Section: Introductionmentioning

confidence: 99%

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

Mantashian

2024

Nanophotonics X

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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 extreme variety offered by the recent advances in growth techniques tailored to the attainment of QDs and nanostructures with virtually any shape. To that end, the Finite Element Method in conjunction with the Effective Mass Approximation and Envelope Function Approximation was employed to solve the one-particle eigenproblems in domains with any complex geometries. The paper explores nanoplatelets, spherical QDs, nanocones, nanorods, nanotadpoles, and nanostars. It has been found that there is a clear correlation between the complexity and symmetry of the QDs and their linear and nonlinear absorption spectra for transitions between the electronic ground state and the first three excited states.

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Section: Introductionmentioning

confidence: 99%

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

Mantashian

2024

Nanophotonics X

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“…A more exhaustive review of the recent literature shows a very high interest in four-wave mixing spectroscopy both in its fundamental conception and in its various applications, which include the study of multiphotonic processes, as well as those of technological development, characterization of materials, optical communications, optomechanics, coherent control, optical trapping, tweezers, among others. − It should also be noted that, as part of the extensive application of this technique and its varied model formulation, the use of characterization tools through nonlinear optical properties highlighting more explicit considerations of solvent action, quantum effects, and functionalized organic compounds, have been the subject of recent work by many authors. − …”

Section: Introductionmentioning

confidence: 99%

Stochastic Nature and Intramolecular Coupling in Optical Response Profiles: Critical Analysis through Semiclassical Models

et al. 2023

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We have studied the nonlinear absorptive and dispersive responses considering a molecular system consisting of two-levels, where aspects of the vibrational internal structure and intramolecular coupling are inserted, in addition to the considerations of interaction with the thermal reservoir. The Born–Oppenheimer electronic energy curve for this molecular model consists of two-intercrossing harmonic oscillator potentials with minima displaced in energy and nuclear coordinate. The results obtained show how these optical responses are sensitive to explicit considerations of both intramolecular coupling and the presence of the solvent through their stochastic interaction. Our study shows that the permanent dipoles of the system and the transition dipoles induced by electromagnetic field effects represent critical quantities for the analysis. The solvent action in our model is treated through the natural Bohr frequency shift to a time-dependent function, with explicit manifestations in its comparison as if the upper state were broadened. Significant variations in the nonlinear optical properties for cases of perturbative and saturative treatments, relaxation times, and optical propagation, mainly due to changes in the probe and pump intensities, are studied. Our studies relating the intramolecular effects with those generated by the presence of the solvent and its stochastic interaction with the solute of study, have allowed not only to analyze the influence of these in the profile of the optical responses, but they could also provide some insights into the analysis and characterization of molecular systems through nonlinear optical properties.

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“…The MMS potential is a special form of the Mobius squared potential [4], which has been applied in molecular, chemical and high energy physics [4][5][6][7]. The MMS potential has been sparingly reported in the literature [2,8,9]. The Eckart potential is a very useful chemical physics potential model [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Quantum information of the modified Mobius squared plus Eckart potential

Njoku

Onyeocha

Onyenegecha

et al. 2022

Int J of Quantum Chemistry

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The quantum information measures and complexity of the modified Mobius squared plus Eckart (MMSE) potential are presented in this paper. First, the energy eigenvalues and wave function of the system are obtained from the approximate solutions of the Schrödinger equation via the parametric Nikiforov-Uvarov (pNU) method.Using the wave function, the Shannon entropy, Onicescu information energy and Fisher information of the system are examined for two low-lying states along with the modified Lopez-Ruiz-Mancini-Calbet (LMC) complexity and Heisenberg uncertainty relation. The results of the work point to the fact that the radial (momentum) probability density peak shifts to lower (higher) values with increase in the screening parameter. Furthermore, the Bialynicki-Birula and Mycielski (BBM) inequality, the lower bound of the modified LMC complexity, the Fisher information sum inequality and the Stam-Cramer-Rao inequality are verified for the system. Also, the Heisenberg uncertainty principle is verified for the MMSE potential and the existence of squeezed states is observed for both position and momentum states.

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Linear and nonlinear optical properties in spherical quantum dots: Modified Möbius squared potential

Cited by 10 publications

References 46 publications

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

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

Stochastic Nature and Intramolecular Coupling in Optical Response Profiles: Critical Analysis through Semiclassical Models

Quantum information of the modified Mobius squared plus Eckart potential

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