Influence of applied electric fields on the electron-related second and third-order nonlinear optical responses in two dimensional elliptic quantum dots

Giraldo-Tobón, E.; Ospina, Walter; Miranda-Pedraza, Guillermo L.

doi:10.1016/j.spmi.2015.02.041

Cited by 15 publications

(5 citation statements)

References 38 publications

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“…In order to perform the PT approximation, the last term between braces in the left hand side of Eq. (1) was taken as a perturbation, whereas the remaining terms were taken as the unperturbed Hamiltonian which has analytic solutions in terms of Mathieu functions or in terms of Bessel functions if

b / a = 1

(see also ).…”

Section: Resultsmentioning

confidence: 99%

Effects of applied electric fields on optical responses in elliptical quantum nanosystems

Miranda-Pedraza

Ospina

Giraldo-Tobón

2016

Phys. Status Solidi B

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The optical absorption response of an elliptical quantum‐dot‐type nanostructure is investigated by numerically determining the electron states within the effective mass and parabolic approximations via the finite element method, taking into account the effect of an externally applied electric field. Validation of the numerical procedure is discussed through the comparison with analytical results of previous works for zero external field conditions. For finite field, the comparison is made with the outcome of degenerate perturbation theory. The calculated electron energies and wavefunctions are used to evaluate the linear and nonlinear light absorption and refractive index change coefficients in the system. Their corresponding expressions are those typically derived within a perturbative approach for solving the density matrix equation of motion. It is shown how the electric field and the change in the elliptical geometry affect the optical response of the considered structures. The extension of the treatment to consider the properties of elliptic nanoparticles under external field influences is briefly discussed.

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b / a = 1

(see also ).…”

Section: Resultsmentioning

confidence: 99%

Effects of applied electric fields on optical responses in elliptical quantum nanosystems

Miranda-Pedraza

Ospina

Giraldo-Tobón

2016

Phys. Status Solidi B

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“…Once the electronic states are obtained, the coefficients of optical processes associated to electron transitions can be calculated. Here, the so called compact density matrix method, which have been widely applied to obtain the optical response in low dimensional systems, is used . This method allows to obtain the dielectric susceptibility in terms of powers of the amplitude of the incident electric field.…”

Section: Theoretical Frameworkmentioning

confidence: 99%

Nonlinear terahertz response associated to electronic intersubband transitions in a V-groove quantum wire

Miranda-Pedraza

Ospina

Giraldo-Tobón

2017

Phys. Status Solidi B

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The electron states as well as the nonlinear optical rectification and second and third harmonic generations are investigated in a GaAs‐based V‐groove quantum wire. The single band effective mass Schrödinger equation is solved using the finite element method. The nonlinear optical coefficients were calculated from expressions derived within the compact density matrix method. It is found that this kind of nanostructures can exhibit noticeable nonlinear responses in the domain of the terahertz when the V‐groove is in the open‐wide geometrical configuration.

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“…It is well known that QDs have significant size effects, and the electronic state and band structure of quantum dots can be easily changed by adjusting the shape, size and structure of QDs [15][16][17][18], and then the nonlinearity OR coefficient can be adjusted. Thus, the OR effect in QDs with different shapes (e.g., columnar [19], disk [20,21], cube [22,23], lens [24,25], ellipsoid [26,27], and sphere [28,29]) has been investigated. However, there is no theoretical study on the effects of the system structure factors and environmental factors of the OR coefficient of a spherical QD system with like-screened Kratzer potential.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear optical properties of tunable spherical quantum dots under like-screened Kratzer potential

Wang,

Li,

Cai

et al. 2024

Phys. Scr.

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Using the effective mass approximation and the iterative procedure, we study the optical rectification (OR) coefficient of a spherical quantum dot (QD) system with like-screened Kratzer potential (LSKP), taking into account the influence of the confinement potential depth, quantum size and external environment. Our results show that the magnitude of the OR coefficient is strongly dependent on the magnitude of the tunable factor, whose peak value will be red-shifted or blue-shifted. Interestingly, the limiting potential depth and temperature have opposite effects on the OR coefficient in terms of peak location and size. Therefore, it is necessary to pay more attention to the influence of internal and external parameters on nonlinear optical effects, and apply the theory to practical experiments and the manufacture of optoelectronic devices.

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Influence of applied electric fields on the electron-related second and third-order nonlinear optical responses in two dimensional elliptic quantum dots

Cited by 15 publications

References 38 publications

Effects of applied electric fields on optical responses in elliptical quantum nanosystems

Effects of applied electric fields on optical responses in elliptical quantum nanosystems

Nonlinear terahertz response associated to electronic intersubband transitions in a V-groove quantum wire

Nonlinear optical properties of tunable spherical quantum dots under like-screened Kratzer potential

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