InAlAs/InGaAs/GaAsSb双量子阱异质结构的带隙剪裁和光学响应：单轴应变和阱宽变化的影响

IF 1.2 4区物理与天体物理 Q4 OPTICS

Journal of Modern Optics Pub Date : 2022-12-15 DOI:10.1080/09500340.2022.2160023

Md. Riyaj, Amit Rathi, Ashutosh Kumar Singh, Pushpalata, P. A. Alvi

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引用次数: 1

摘要

摘要本研究采用理论方法研究了GaAs基InAlAs/InGaAs/GaAsSb II型异质结构。6 × 采用自洽计算的6k·p哈密顿矩阵，计算了双量子阱异质结构在可变量子阱宽度和外部应变下的波函数、电荷载流子的局域性（电荷载流子的概率密度）及其分散能态（离散能级）。已经报道了不同铝成分的InAlAs/GaA的体带结构。还探讨了量子阱尺寸和外部应变对光增益的影响。计算分析表明，产生的光具有1.93μm的近红外激光波长。在12 GPa时，光学增益达到7450 cm−1，波长为1.93μm。对于2 nm的阱宽度，峰值增益为5931 cm−1。根据观察结果，所开发的II型结构可用于在NIR范围内工作的半导体激光二极管。

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Bandgap tailoring and optical response of InAlAs/InGaAs/GaAsSb double quantum well heterostructures: the impact of uniaxial strain and well width variations

ABSTRACT In this research work, a theoretical approach has been adopted to study GaAs-based InAlAs/InGaAs/GaAsSb type-II heterostructures. The 6 × 6 k·p Hamiltonian matrix with self-consistent calculations has been carried out to calculate the wavefunctions, localization of the charge carriers (probability density of charge carriers) and their dispersed energy states (Discrete energy level) under variable quantum well width and external strain of the double quantum well heterostructure. Bulk band structures of InAlAs/GaA for different aluminium compositions have been reported. The quantum well size and external strain effect on optical gain have also been explored. Computational analysis showed the generated light has a 1.93 μm NIR lasing wavelength. At 12 GPa, optical gain reaches 7450 cm−1 and wavelength 1.93 μm. Peak gain is 5931 cm−1 for 2 nm well width. The developed type-II structure can be employed in a semiconductor laser diode operating in the NIR range as per the observed results.

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来源期刊

Journal of Modern Optics 物理-光学

CiteScore

2.90

自引率

0.00%

发文量

审稿时长

2.6 months

期刊介绍： The journal (under its former title Optica Acta) was founded in 1953 - some years before the advent of the laser - as an international journal of optics. Since then optical research has changed greatly; fresh areas of inquiry have been explored, different techniques have been employed and the range of application has greatly increased. The journal has continued to reflect these advances as part of its steadily widening scope. Journal of Modern Optics aims to publish original and timely contributions to optical knowledge from educational institutions, government establishments and industrial R&D groups world-wide. The whole field of classical and quantum optics is covered. Papers may deal with the applications of fundamentals of modern optics, considering both experimental and theoretical aspects of contemporary research. In addition to regular papers, there are topical and tutorial reviews, and special issues on highlighted areas. All manuscript submissions are subject to initial appraisal by the Editor, and, if found suitable for further consideration, to peer review by independent, anonymous expert referees. General topics covered include: • Optical and photonic materials (inc. metamaterials) • Plasmonics and nanophotonics • Quantum optics (inc. quantum information) • Optical instrumentation and technology (inc. detectors, metrology, sensors, lasers) • Coherence, propagation, polarization and manipulation (classical optics) • Scattering and holography (diffractive optics) • Optical fibres and optical communications (inc. integrated optics, amplifiers) • Vision science and applications • Medical and biomedical optics • Nonlinear and ultrafast optics (inc. harmonic generation, multiphoton spectroscopy) • Imaging and Image processing