Extended spatial coherence of interlayer excitons in van der Waals heterostructures

被引：0
|
作者：
Figueiredo, J. [1 ,2 ,3 ]
Troue, M. [1 ,2 ,3 ]
Wurstbauer, U. [4 ]
Holleitner, A. W. [1 ,2 ,3 ]
机构：
[1] Tech Univ Munich, Walter Schottky Inst, Coulombwall 4a, D-85748 Garching, Germany
[2] Tech Univ Munich, Phys Dept, Coulombwall 4a, D-85748 Garching, Germany
[3] Munich Ctr Quantum Sci & Technol MCQST, Schellingstr 4, D-80799 Munich, Germany
[4] Munster Univ, Inst Phys, Wilhelm Klemm Str 10, D-48149 Munster, Germany
来源：
2D PHOTONIC MATERIALS AND DEVICES VII | 2024年 / 12888卷
关键词：
interlayer excitons; exciton condensation; spatial and temporal coherence; 2D van der Waals heterobilayer;
D O I：
10.1117/12.3001656
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We report on the spatial and temporal coherence of interlayer exciton ensembles as photoexcited in MoSe2/WSe2 heterostructures and characterized by point-inversion Michelson-Morley interferometry.(1) Below 10 K, the measured spatial coherence length of the interlayer excitons reaches values equivalent to the lateral expansion of the exciton ensembles. In this regime, the light emission of the excitons turns out to be homogeneously broadened in energy with a high temporal coherence. At higher temperatures, both the spatial and temporal coherence lengths decrease, most likely because of thermal processes. The presented findings point towards a spatially extended, coherent many-body state of interlayer excitons at low temperature.
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页数：3
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