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

被引：0

作者：

Evers, Eiko ^{[1
]}

Kopteva, Nataliia E. ^{[1
]}

Nedelea, Vitalie ^{[1
]}

Kors, Andrei ^{[2
]}

Kaur, Ranbir ^{[2
]}

Peter Reithmaier, Johann ^{[2
]}

Benyoucef, Mohamed ^{[2
]}

Bayer, Manfred ^{[1
]}

Greilich, Alex ^{[1
]}

机构：

[1] Tech Univ Dortmund, Expt Phys 2, D-44221 Dortmund, Germany

[2] Univ Kassel, Inst Nanostruct Technol & Analyt INA, CINSaT, D-34132 Kassel, Germany

来源：

PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS | 2025年 / 262卷 / 01期

关键词：

quantum dots; spin coherence; spin relaxation; telecom; MODE-LOCKING; ENTANGLEMENT; ELECTRON;

D O I：

10.1002/pssb.202400174

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Measurements of the longitudinal and transverse spin relaxation times of holes in an ensemble of vertically tunnel-coupled self-assembled InAs/In0.53Al0.24Ga0.23As 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 T-2 = 0.02 - 0.4 mu s. The longitudinal spin relaxation time T-1 = 0.5 mu s 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.

引用

页数：7

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