Investigation of Purcell enhancement of quantum dots emitting in the telecom O-band with an open fiber cavity

被引：0
作者：
Maisch, J. [1 ,2 ]
Grammel, J. [2 ,3 ]
Tran, N. [1 ,2 ]
Jetter, M. [1 ,2 ]
Portalupi, S. L. [1 ,2 ]
Hunger, D. [2 ,3 ,4 ]
Michler, P. [1 ,2 ]
机构：
[1] Univ Stuttgart, Inst Halbleiteropt & Funkt Grenzflachen, SCoPE, Allmandring 3, D-70569 Stuttgart, Germany
[2] Univ Stuttgart, Ctr Integrated Quantum Sci & Technol IQST, Allmandring 3, D-70569 Stuttgart, Germany
[3] Karlsruhe Inst Technol KIT, Phys Inst PHI, Wolfgang Gaede Str 1, D-76131 Karlsruhe, Germany
[4] Karlsruhe Inst Technol KIT, Inst Quantum Mat & Technol IQMT, Herrmann von Helmholtz Pl 1, D-76344 Eggenstein Leopoldshafen, Germany
来源：
PHYSICAL REVIEW B | 2024年 / 110卷 / 16期
关键词：
QUALITY FACTOR; PHOTON;
D O I：
10.1103/PhysRevB.110.165301
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Single-photon emitters integrated in optical microcavities are key elements in quantum com munication applications. However, optimizing their emission properties and achieving efficient cavity coupling remain significant challenges. In this study, we investigate semiconductor quantum dots (QDs) emitting in the telecom O-band and integrate them in an open fiber-cavity. Such cavities offer spatial and spectral tunability and intrinsic fiber-coupling. The design promises high collection efficiency and enables the investigation of multiple emitters in heterogeneous samples. We observe a reduction of the decay times of several individual emitters by up to a factor of 2.46(2) . 46(2) due to the Purcell effect. We comprehensively analyze the current limitations of the system, including cavity and emitter properties, the impact of the observed regime where cavity and emitter linewidths are comparable, as well as the mechanical fluctuations of the cavity length. The results elucidate the path towards efficient telecom quantum light sources.
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页数：14
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