Three-Level Optical Stark Effect of Excitons in GaAs Cylindrical Quantum Wires

Thao, Dinh Nhu; Phuoc, Duong Dinh; Bao, Le Thi Ngoc; Hien, Le Thi Dieu; Linh, Tran P. T.; Thuy, Nguyen Thi Le

doi:10.1155/2021/5594256

Cited by 2 publications

(1 citation statement)

References 55 publications

(64 reference statements)

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“…The Semiconductor quantum wires, one of the low-dimensional structures that possess many special properties, have drawn the attention of scientists These structures could be applied to great high-speed lasers quantum electron waveguides, resonant tunneling field effect transistors, or telecommunication network [7]. If the two dimensions of the material are reduced to Nano range while the third dimension remains large, then the material or structure is called quantum wire (QWR).…”

Section: Calculationsmentioning

confidence: 99%

Threshold current density calculation for quantum wire of 〖Hg〗_(0.5) 〖Cd〗_(0.5) Te/〖Hg〗_(0.8) 〖Cd〗_(0.2) Te/CdTe laser

Leptit

Feng

2022

ETN

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This study of semiconductor laser structure works on reducing the value of the threshold current density to improve the working conditions of the laser device. In this paper shown that the threshold current density and Optical confinement factor Г depends on Barrier width (B), and Number of well (Nw). We found any increase in Barrier width and Number of well is enhanced important parameters of diode laser such as threshold current density and confinement factor that's clearly for (Nw=2, B=40 nm) then (Г=0.175, ), while for (Nw=2, B=60 nm), that give results are (Г=0.195, ). On the other hand, when changing Nw=3, the results become for (B=40 nm and B=60 nm), as follows (Г=0.275, and (Г=0.295, respectively. This investigated contributed to calculating the efficiency and work of the laser device. We found the value of slope efficiency equal (45 %) and the external quantum efficiency ( 50 %).

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Section: Calculationsmentioning

confidence: 99%

Threshold current density calculation for quantum wire of 〖Hg〗_(0.5) 〖Cd〗_(0.5) Te/〖Hg〗_(0.8) 〖Cd〗_(0.2) Te/CdTe laser

Leptit

Feng

2022

ETN

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On the Optical Stark Effect of Excitons in InGaAs Prolate Ellipsoidal Quantum Dots

Bao

Phuoc

Hien

et al. 2021

Journal of Nanomaterials

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In this paper, we study the exciton absorption spectra in InGaAs prolate ellipsoidal quantum dots when a strong pump laser resonant with electron quantized levels is active. Our obtained results by renormalized wavefunction theory show that, under suitable conditions, the initial exciton absorption peak is split into two new peaks as the evidence of the existence of the three-level optical Stark effect of excitons. We have suggested an explanation of the origin of the effect as well as investigating the effect of pump field energy, size, and geometric shape of the quantum dots on effect characteristics. The comparison with the results obtained in the spherical quantum dots implies the important role of geometric shape of the quantum structures when we examine this effect.

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Three-Level Optical Stark Effect of Excitons in GaAs Cylindrical Quantum Wires

Cited by 2 publications

References 55 publications

Threshold current density calculation for quantum wire of 〖Hg〗_(0.5) 〖Cd〗_(0.5) Te/〖Hg〗_(0.8) 〖Cd〗_(0.2) Te/CdTe laser

Threshold current density calculation for quantum wire of 〖Hg〗_(0.5) 〖Cd〗_(0.5) Te/〖Hg〗_(0.8) 〖Cd〗_(0.2) Te/CdTe laser

On the Optical Stark Effect of Excitons in InGaAs Prolate Ellipsoidal Quantum Dots

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