Oscillator strength and carrier dynamics in type I and inverted type I spherical core/ shell nanostructures under external laser field

Balakrishnan, Arsha; Nithiananthi, P.

doi:10.1016/j.spmi.2019.106288

Cited by 6 publications

(3 citation statements)

References 25 publications

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“…1 can be translated as a space-related operator through unitary transformation and by Floquet theory in the Kramers-Henneberger (KH) accelerated frame. 25,28 The laser dressed parameter "α" is used to define the intensity of applied laser field in such space translated Hamiltonian. "α" has the dimension of length and it is defined by the relation, 29,30…”

Section: Theorymentioning

confidence: 99%

Laser Dressed Magnetic Polaron In Semimagnetic Core/Shell Nanostructure

Balakrishnan

Nithiananthi

2021

ECS J. Solid State Sci. Technol.

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The combined effects of magnetic and intense laser fields on the properties of the ground state exciton in semimagnetic Cd 0.7 Mn 0.3 Te/CdTe Core/Shell Nanostructure (CSN) are analyzed using the variational method in the effective mass approximation. The magnetic field of 5 to 20 T, a laser with the frequency of 10 THz and its intensity ranging from 0.44 to 7.11 μW nm −2 are considered as external perturbing fields. The evolution of Exciton Magnetic Polaron (EMP) in response to the external fields is explored via Magnetization (M) and Zeeman energy shift (ΔE ZE ). The variation in binding energy (BE) of an exciton, M and ΔE ZE are examined for different shell widths, magnetic and laser fields. The laser-induced diamagnetism due to the dressed energy state of carriers reduces the polarization of EMP. Similarly, the external magnetic field reduces the exchange interaction between carriers and weakens EMP. The combined effect of perturbing fields on an EMP will give an insight on controlling the performance of magneto-optic devices.

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Section: Theorymentioning

confidence: 99%

Laser Dressed Magnetic Polaron In Semimagnetic Core/Shell Nanostructure

Balakrishnan

Nithiananthi

2021

ECS J. Solid State Sci. Technol.

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“…Regarding the CSQD, numerous works have been devoted to these structures-either type I or type II, for CdTe/ZnS, CdTe/CdS among other materials, in recent years [30][31][32][33][34][35][36][37][38][39][40][41][42][43][44][45][46][47]. The strain field effect, resulting from the lattice mismatches, on CSQD has been performed in some works [48][49][50][51].…”

Section: Introductionmentioning

confidence: 99%

Unveiling the Role of Donor Impurity Position on the Electronic Properties in Strained Type I and Type II Core/Shell Quantum Dots under Magnetic Field

Pérez,

Aghoutane,

Laroze

et al. 2023

Materials

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In this theoretical investigation, we delve into the significant effects of donor impurity position within core/shell quantum dot structures: type I (CdTe/ZnS) and type II (CdTe/CdS). The donor impurity’s precise location within both the core and the shell regions is explored to unveil its profound influence on the electronic properties of these nanostructures. Our study investigates the diamagnetic susceptibility and binding energy of the donor impurity while considering the presence of an external magnetic field. Moreover, the lattice mismatch-induced strain between the core and shell materials is carefully examined as it profoundly influences the electronic structure of the quantum dot system. Through detailed calculations, we analyze the strain effects on the conduction and valence bands, as well as the electron and hole energy spectrum within the core/shell quantum dots. The results highlight the significance of donor impurity position as a key factor in shaping the behaviors of impurity binding energy and diamagnetic susceptibility. Furthermore, our findings shed light on the potential for tuning the electronic properties of core/shell quantum dots through precise impurity positioning and strain engineering.

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“…Core-shell polymers can be manufactured through a vast number of experimental means, including various methods such as electrospinning [2] and solvent-free and large scale processes [3], as well as ultrasound-assisted methods [4]. Furthermore, material properties have been studied under several circumstances and environmental conditions, such as laser fields, mini-emulsions, pre-emulsions and acid media [5,6].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of a Core-Shell Copolymer with Different Glass Transition Temperatures

Goulis

Kartsonakis

Charitidis

2020

Fibers

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The aim of this study is to synthesize an organic core-shell co-polymer with a different glass transition temperature (Tg) between the core and the shell that can be used for several applications such as the selective debonding of coatings or the release of encapsulated materials. The co-polymer was synthesized using free radical polymerization and was characterized with respect to its morphology, composition and thermal behavior. The obtained results confirmed the successful synthesis of the co-polymer copolymer poly(methyl methacrylate)@poly(methacrylic acid-co-ethylene glycol dimethacrylate), PMMA@P(MAA-co-EGDMA), which can be used along with water-based solvents. Furthermore, the Tg of the polymer’s core PMMA was 104 °C, while the Tg of the shell P(MAA-co-EGDMA) was 228 °C, making it appropriate for a wide variety of applications. It is worth mentioning that by following this specific experimental procedure, methacrylic acid was copolymerized in water, as the shell of the copolymer, without forming a gel-like structure (hydrogel), as happens when a monomer is polymerized in aqueous media, such as in the case of super-absorbent polymers. Moreover, the addition and subsequent polymerization of the monomer methyl methacrylate (MAA) into the mixture of the already polymerized PMMA resulted in a material that was uniform in size, without any agglomerations or sediments.

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Oscillator strength and carrier dynamics in type I and inverted type I spherical core/ shell nanostructures under external laser field

Cited by 6 publications

References 25 publications

Laser Dressed Magnetic Polaron In Semimagnetic Core/Shell Nanostructure

Laser Dressed Magnetic Polaron In Semimagnetic Core/Shell Nanostructure

Unveiling the Role of Donor Impurity Position on the Electronic Properties in Strained Type I and Type II Core/Shell Quantum Dots under Magnetic Field

Synthesis and Characterization of a Core-Shell Copolymer with Different Glass Transition Temperatures

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