Second and third harmonic generations of a quantum ring with Rashba and Dresselhaus spin-orbit couplings: Temperature and Zeeman effects

Zamani, Ali; Azargoshasb, T.; Niknam, E.

doi:10.1016/j.physb.2017.08.031

Cited by 17 publications

(8 citation statements)

References 53 publications

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“…The OR, SHG and THG of a quantum well under an intense laser field was reported by Sakiroglu et al [32]. Simultaneous influence of both SOI interactions on the second and third order of susceptibilities of a quantum ring was obtained at confined temperature by Zamani [39]. Nautiyal calculated the SHG coefficients of a quantum disc induced by multi-effects of magnetic field and R and D SOIs [40].…”

Section: Introductionmentioning

confidence: 90%

“…RSOI and DSOI effects are induced by structure inversion asymmetry and bulk inversion asymmetry in nano-semiconductors, respectively. These two types of SOIs along with external factors such as electric and magnetic fields, intense laser field, temperature, pressure and excitonic effects can strongly modify electrical and optical properties of quantum structures [34][35][36][37][38][39][40][41].…”

Section: Introductionmentioning

confidence: 99%

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Impacts of external fields and Rashba and Dresselhaus spin–orbit interactions on the optical rectification, second and third harmonic generations of a quantum ring

2019

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In the present paper, based on matrix diagonalization method and density matrix approach, the optical rectification (OR), second harmonic and third harmonic generations (SHG and THG) of a GaAs quantum ring (QR) were numerically investigated. To do this purpose, dependency of transition energies and geometrical factors on external magnetic, electric fields and inner radius were analyzed in the presence of Rashba (R) and Dresselhaus (D) spin orbit interactions (SOIs). The outcomes obviously indicate that position and amplitude of OR, SHG and THG peaks experienced intensive depend on external fields, inner radius and interplay of SOIs. These outcomes may be useful due to improvement of spintronics devices.

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Section: Introductionmentioning

confidence: 90%

Section: Introductionmentioning

confidence: 99%

Impacts of external fields and Rashba and Dresselhaus spin–orbit interactions on the optical rectification, second and third harmonic generations of a quantum ring

2019

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“…Karabulut and Baskoutas [31] calculated the SHG-and THG-susceptibility of spherical QD with parabolic confinement subjected to an external electric field with the presence of an impurity. Zamani et al [32] by considering the Zeeman effect in the presence of simultaneous Rashba and Dresselhaus spin-orbit interaction, investigated SHG and THG of a GaAs quantum ring at finite temperature.…”

Section: Khordad and Vaseghimentioning

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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“…[30]. The influence of temperature on the nonlinear optical responses of a GaAs QR under simultaneous Dresselhaus and Rashba SOI contributions and Zeeman effect was considered in [31,32]. In the work of Ref.…”

Section: Introductionmentioning

confidence: 99%

Spin–Orbit and Zeeman Effects on the Electronic Properties of Single Quantum Rings: Applied Magnetic Field and Topological Defects

et al. 2023

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Within the framework of effective mass theory, we investigate the effects of spin–orbit interaction (SOI) and Zeeman splitting on the electronic properties of an electron confined in GaAs single quantum rings. Energies and envelope wavefunctions in the system are determined by solving the Schrödinger equation via the finite element method. First, we consider an inversely quadratic model potential to describe electron confining profiles in a single quantum ring. The study also analyzes the influence of applied electric and magnetic fields. Solutions for eigenstates are then used to evaluate the linear inter-state light absorption coefficient through the corresponding resonant transition energies and electric dipole matrix moment elements, assuming circular polarization for the incident radiation. Results show that both SOI effects and Zeeman splitting reduce the absorption intensity for the considered transitions compared to the case when these interactions are absent. In addition, the magnitude and position of the resonant peaks have non-monotonic behavior with external magnetic fields. Secondly, we investigate the electronic and optical properties of the electron confined in the quantum ring with a topological defect in the structure; the results show that the crossings in the energy curves as a function of the magnetic field are eliminated, and, therefore, an improvement in transition energies occurs. In addition, the dipole matrix moments present a non-oscillatory behavior compared to the case when a topological defect is not considered.

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Second and third harmonic generations of a quantum ring with Rashba and Dresselhaus spin-orbit couplings: Temperature and Zeeman effects

Cited by 17 publications

References 53 publications

Impacts of external fields and Rashba and Dresselhaus spin–orbit interactions on the optical rectification, second and third harmonic generations of a quantum ring

Impacts of external fields and Rashba and Dresselhaus spin–orbit interactions on the optical rectification, second and third harmonic generations of a quantum ring

Second and third harmonic generation of asymmetrical Gaussian potential quantum dot

Spin–Orbit and Zeeman Effects on the Electronic Properties of Single Quantum Rings: Applied Magnetic Field and Topological Defects

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