Hole Spin Coherence in InAs/InAlGaAs Self‐Assembled Quantum Dots Emitting at Telecom Wavelengths

IF 1.5 4区物理与天体物理 Q3 PHYSICS, CONDENSED MATTER

Physica Status Solidi B-basic Solid State Physics Pub Date : 2024-09-03 DOI:10.1002/pssb.202400174

Eiko Evers, Nataliia E. Kopteva, Vitalie Nedelea, Andrei Kors, Ranbir Kaur, Johann Peter Reithmaier, Mohamed Benyoucef, Manfred Bayer, Alex Greilich

引用次数: 0

Abstract

Measurements of the longitudinal and transverse spin relaxation times of holes in an ensemble of vertically tunnel‐coupled self‐assembled InAs/InAlGaAs quantum dots (QDs), emitting in the telecom spectral range, are reported. The spin coherence is determined using the spin mode‐locking method in the inhomogeneous ensemble of QDs. Modeling the signal allows us to extract the hole spin coherence time to be in the range of μs. The longitudinal spin relaxation time μs is measured using the spin inertia method. The parameters investigated allow us to suggest that the main relaxation mechanism at low magnetic fields is related to the electron–hole spin exchange.

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以电信波长发射的 InAs/InAlGaAs 自组装量子点中的空穴自旋相干性

报告测量了垂直隧道耦合自组装 InAs/InAlGaAs 量子点（QDs）集合中空穴的纵向和横向自旋弛豫时间，该集合在电信光谱范围内发光。在不均匀的量子点集合体中，使用自旋模式锁定方法确定了自旋相干性。通过对信号进行建模，我们可以得出空穴自旋相干时间在 μs 范围内。利用自旋惯性法测量了纵向自旋弛豫时间 μs。根据所研究的参数，我们认为低磁场下的主要弛豫机制与电子-空穴自旋交换有关。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Physica Status Solidi B-basic Solid State Physics 物理-物理：凝聚态物理

CiteScore

3.30

自引率

6.20%

发文量

321

审稿时长

2 months

期刊介绍： physica status solidi is devoted to the thorough peer review and the rapid publication of new and important results in all fields of solid state and materials physics, from basic science to applications and devices. Being among the largest and most important international publications, the pss journals publish review articles, letters and original work as well as special issues and conference contributions. physica status solidi b – basic solid state physics is devoted to topics such as theoretical and experimental investigations of the atomistic and electronic structure of solids in general, phase transitions, electronic and optical properties of low-dimensional, nano-scale, strongly correlated, or disordered systems, superconductivity, magnetism, ferroelectricity etc.