Effect of wells thicknesses disorder on quantum magneto-transport properties in GaAs/AlxGa1-xAs multi-quantum wells near wavelength infrared detectors

Melkoud, Samir; Nafidi, A.; Barkissy, Driss

doi:10.1016/j.spmi.2021.107138

Cited by 3 publications

(2 citation statements)

References 22 publications

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“…However, to fabricate and design an advanced lowdimensional system on a large scale is mandatory to take into consideration the structural disorder present at the heterointerface and in the epitaxial layers. In addition to this, the physical properties and related phenomena such as optical properties [31][32][33][34][35][36][37] are governed by the quality of disorders and can be changed dramatically, when the disorder is presented in low-dimensional systems [2,[38][39][40][41][42][43][44][45][46][47][48]. For instance, Nezhad et al [40] investigated numerically the effects of disordered optical waveguide arrays in the presence and absence of the positive Kerr nonlinearity.…”

Section: Introductionmentioning

confidence: 99%

“…They show an increase of effective mass in narrow QWs for the confined exciton and an amount of photoluminescence linebroadening. In relation to other optical properties, Melkoud et al [46] investigated theoretically, the effect of wells thickness disorder on quantum magneto-transport properties in GaAs/Al x Ga 1−x As multi-quantum wells. They reported an increase of disorder induce a decrease of the mean free path near wavelength infrared detectors.…”

Section: Introductionmentioning

confidence: 99%

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Disorder effect on intersubband optical absorption of n-type δ-doped quantum well in GaAs

Noverola-Gamas,

Macias Rojas,

Azalim

et al. 2023

J. Phys.: Condens. Matter

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The inevitable structural disorder associated with the fluctuation of the applied external electric field, laser intensity, and bidimensional density in the low dimensional quantum system can affect noticeably optical absorption properties and the related phenomena. In this work, we study the effect of structural disorder on the optical absorption properties in delta-doped quantum wells (DDQWs). Starting from effective mass approximation and the Thomas-Fermi approach as well as using the matrix density, the electronic structure and the optical absorption coefficients of DDQWs are determined. It is found that the optical absorption properties depend on the strength and the type of structural disorder. Particularly, the bidimensional density disorder suppresses strongly the optical properties. Whilst, the disordered external applied electric field fluctuates moderately in the properties. In contrast, the disordered laser holds absorption properties unalterable. So, our results specify that to have and preserve good optical absorption properties in DDQWs, requires precise control of the bidimensional. Besides, the finding may improve the understanding of the impact of the disorder on the optoelectronic properties based on DDQWs.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Disorder effect on intersubband optical absorption of n-type δ-doped quantum well in GaAs

Noverola-Gamas,

Macias Rojas,

Azalim

et al. 2023

J. Phys.: Condens. Matter

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Enhanced Second‐Harmonic Generation in Quadratically Nonlinear Weyl Semimetal NbAs for Broadband Photodetection Applications

Li,

Bian,

Xia

et al. 2024

Adv Funct Materials

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Quadratically nonlinear photodetectors (QNPDs) typically focus on 2D materials with high second‐order nonlinear polarizability, thereby severely disregarding bulk nonlinear optical (NLO) crystals as these rely on phase‐matching technology and achieving efficient bulk QNPDs remains a significant challenge. Weyl semimetal crystals have some signatures of inversion symmetry breaking, most notably second‐order NLO polarizability, while the inability to balance the low transmittance limits frequency conversion of the zero‐band gap absorption‐induced crystal. Herein, this study investigates an efficient QNPD based on bulk NbAs crystals designed with a strong second‐harmonic effect due to its large refractive index (≈5.0), resulting in an intense laser reflectivity of 50% on its surface, which creates a favorable environment for achieving second‐harmonic generation (SHG) without phase matching. The QNPD has a rectification ratio exceeding 107 with a dark current of 164 pA and an enhanced photoresponse in the 355‒1900 nm range, exhibiting a maximum responsivity of 4.1 mA W−1 with a detectivity of 0.8 × 1010 Jones at 355 nm. The responsivity improvement rate is 88% higher than that of linear NbAs (001) photodetector. This study opens new avenues for designing QNPDs by utilizing the second harmonic effect in bulk Weyl semimetal crystals.

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Effect of Al0.1Ga0.9As thickness on the structural, optical, thermal, and electrical properties of (Al0.1 Ga 0.9As)/GaAs heterojunctions

AL-Naghmaish

Ghrib

Dakhlaoui

et al. 2023

Micro and Nanostructures

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Effect of wells thicknesses disorder on quantum magneto-transport properties in GaAs/AlxGa1-xAs multi-quantum wells near wavelength infrared detectors

Cited by 3 publications

References 22 publications

Disorder effect on intersubband optical absorption of n-type δ-doped quantum well in GaAs

Disorder effect on intersubband optical absorption of n-type δ-doped quantum well in GaAs

Enhanced Second‐Harmonic Generation in Quadratically Nonlinear Weyl Semimetal NbAs for Broadband Photodetection Applications

Effect of Al0.1Ga0.9As thickness on the structural, optical, thermal, and electrical properties of (Al0.1 Ga 0.9As)/GaAs heterojunctions

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