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.
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页数：7
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