Electric field effect on the third-order nonlinear optical susceptibility in inverted core–shell nanodots with dielectric confinement

Arif

2019

Heliyon

Present investigation focuses on analyzing the role of noise-binding energy (BE) interplay on the correction factors (CF) related to Kerr nonlinearity , DC-Kerr effect (DCKE) and electro-absorption coefficient (EAC) of GaAs quantum dot (QD) contaminated with impurity under the active presence of Gaussian white noise . The dopant impurity is modeled by a Gaussian potential. The noise-BE interplay does not give rise to any new interesting feature in case of CF from that in absence of noise. However, the said interplay prominently influences the DCKE and EAC profiles. This is justified by the emergence of distinct qualitative characteristics in the DCKE and EAC profiles that evidently depend on the mode of introduction of noise.

Section: Resultsmentioning

confidence: 64%

Section: Introductionmentioning

confidence: 99%

Influence of noise-binding energy interplay on DC-Kerr effect and electro-absorption coefficient of impurity doped quantum dots

Arif

2019

Heliyon

“…The third-order nonlinear optical susceptibility χ (3) (- ω , 0, 0, ω ) is a complex function. The nonlinear quadratic electro-optic effect (DC-Kerr effect) and EA frequency dependence susceptibilities are related to the real and imaginary part of χ (3) (- ω , 0, 0, ω ) [ 20 - 22 ].…”

Section: Methodsmentioning

confidence: 99%

“…Third-order nonlinear optical processes in ZnS/CdSe core-shell quantum dots are investigated in [ 18 - 20 ]. It is shown that the symmetry of the confinement potential breaks due to large applied external electric fields and leads to an important blueshift of the peak positions in the nonlinear optical spectrum.…”

Section: Introductionmentioning

confidence: 99%

Investigation of quadratic electro-optic effects and electro-absorption process in GaN/AlGaN spherical quantum dot

et al. 2014

Quadratic electro-optic effects (QEOEs) and electro-absorption (EA) process in a GaN/AlGaN spherical quantum dot are theoretically investigated. It is found that the magnitude and resonant position of third-order nonlinear optical susceptibility depend on the nanostructure size and aluminum mole fraction. With increase of the well width and barrier potential, quadratic electro-optic effect and electro-absorption process nonlinear susceptibilities are decreased and blueshifted. The results show that the DC Kerr effect in this case is much larger than that in the bulk case. Finally, it is observed that QEOEs and EA susceptibilities decrease and broaden with the decrease of relaxation time.

“…Electric field ( F ) and magnetic field ( B ) are two prominent physical quantities which are well known for providing valuable information on LDSS. The incorporation of F and B , in effect, alters the effective confinement potential of LDSS.…”

Section: Introductionmentioning

confidence: 99%

Profiles of Static Quadrupole Polarizability of Impurity‐Doped Quantum Dots Driven by Gaussian White Noise

Physica Status Solidi (b)

Arif

Bera

et al. 2020

Herein, the influence of Gaussian white noise on static quadrupole polarizability (SQP) of the impurity‐doped quantum dots (QDs) is studied. The SQP profiles are critically analyzed as several physical quantities are varied over a range in the absence and presence of noise. The introduction of noise to the system is accomplished via two different routes viz. “additive” and “multiplicative.” SQP profiles consist of noticeable features like maximization, minimization, and saturation in the absence of noise and presence of additive noise. However, on most occasions, the SQP profile becomes devoid of any noticeable characteristics in the presence of multiplicative noise. The multiplicative noise plays some noticeable role only during the direct variation in confinement energy. Herein, the exclusive role of additive noise having strength around a typical value for the generation of large SQP is highlighted. The findings bear mentionable importance on the nonlinear optical properties of QD‐based devices under the aegis of noise.