Intense laser field effect on the nonlinear optical properties of triple quantum wells consisting of parabolic and inverse-parabolic quantum wells

Abstract

The nonlinear optical rectification, the second harmonic generation coefficient, and the third harmonic generation coefficient in parabolic-inverse parabolic-parabolic quantum wells (PIPPQWs) and inverse parabolic-parabolic-inverse parabolic quantum wells (IPPIPQWs) are calculated varying the intense laser field (ILF) parameter ( α 0 ). The modifications of the dipole moment matrix elements and the energy levels are depending on the potential shape. The results show that the ILF intensity exerts an active influence on the profile, height, and width of the confinement potential of both PIPPQW and IPPIPQW. The potential profile of IPPIPQW has been affected otherwise than PIPPQW for different ILF intensities. The nonlinear optical rectification, the second harmonic generation, and the third harmonic generation coefficients of PIPPQW and IPPIPQW could be altered in the energy range and the size of the resonance peak by rising the ILF intensity. By changing the α 0 parameter, it is conceivable to organize red or blue shift at the resonance peak positions of the nonlinear optical rectification, the second harmonic generation, and the third harmonic generation coefficients. The shift of the nonlinear optical rectification coefficient occurs when the difference between the ground and the second energy levels changes. According to the parameters used here, while for PIPPQW the spectrum of the resonance peak of the nonlinear optical rectification displays a blue shift with increasing ILF, this spectrum displays a red shift for IPPIPQW. The consequences can be valued in investigating new ways of changing the optical and electronic properties of semiconductor quantum wells.

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

“…As a special second-order nonlinear optical effect, the OR effect has high-speed response characteristics, occupying a non-negligible position in the study of electro-optical effect and light-speed detection of nonlinear materials [6][7][8][9][10][11]. Therefore, studies on the OR effect have been carried out one after another.…”

Optical third-harmonic generation of spherical quantum dots under inversely quadratic Hellmann plus inversely quadratic potential

“…In recent years, due to rapid advances in manufacturing technology, semiconductor structures, especially quantum dots (QDs), have garnered considerable interest [1][2][3][4][5]. Because of their special structure, semiconductor QDs exhibit unique physical properties not found in traditional materials, such as the quantum local effect [6,7], quantum tunneling effect [8], surface effect [9], quantum size effect [10,11] and Coulomb blocking effect [12].…”

“…where Y lm (θ, f) = Θ ml (θ)Φ m (f) is referred to as the spherical harmonic function [32], which is the solution to equations (4) and (5), and m 2 is the separation constant. Substituting V(r) into equation (5), and by the means of transformation z = r 2 , the following equation is obtained:…”

Dynamics of the nonlinear optical second- and third-harmonic generation in quantum well due to hydrostatic pressure and temperature

“…The establishment and refinement of the nonlinear optical system have broadened our understanding of the optical properties of materials and propelled advancements in related theories and technologies [30][31][32][33][34]. In the field of communications, materials with high nonlinear coefficients, such as specialized optical fibers and crystals, efficiently amplify, modulate, and convert optical signals [28,35].…”