Quantenoptische Effekte in Quantenpunkt-Mikroresonatoren

量子点微谐振器中的量子光学效应

• 批准号: 167776844
• 负责人: Professor Dr. Frank Jahnke
• 金额: --
• 依托单位: Institut für Theoretische Physik (ITP)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2010
• 资助国家: 德国
• 起止时间: 2009-12-31 至 2017-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/167776844?language=en
• 关键词: Quantenoptische; Effekte; Quantenpunkt; Mikroresonatoren

The aim of this project is the development of microscopic models for semiconductor quantum dotswhich can be used as active material in novel non-classical light sources. For atomic systems,recently a superradiant laser has been demonstrated in which a spontaneous synchronization ofthe emitters is utilized to strongly increase the spectral purity of the emission. At the same time, theemission was not stored via photons in the resonator, rather than as a coherent phase of theemitters. Within this project, the corresponding effects will be studied for semiconductor quantumdotsystems. In the recent literature, several theoretical and experimental contributions can befound, which address the influence of superradiant coupling of quantum dots onphotoluminescence properties. In the past phase of this project, clear signatures of superradiantcoupling also have been found in laser systems.A direct collaboration between theoretical and experimental groups will be used to identify systemsand excitation conditions, in which superradiant coupling of quantum-dot emitters plays a centralrole. In conventional lasers the excitation of quantum dots takes place via barrier states. Thesubsequent relaxation leads to dephasing, which drives the system into the incoherent regime.Resonant quantum-dot excitation can be used to strongly reduce the homogeneous line width.When the latter is smaller than the cavity line width, the "bad-cavity regime" can be reached, forwhich atomic systems can show superradiant lasing. For the quantum-dot system we will studywhether superradiant effects are able to overcome the detrimental influence of inhomogeneousbroadening. For quantum dots exchanging photons via a microcavity, the inhomogeneousbroadening is mitigated by off-resonant dot-cavity coupling effects, which have been recentlyexplored. Furthermore, in connection with the corresponding experimental studies using opticalpumping, the influence of the photon statistics of the pump light (coherent vs. thermal radiation) onthe emission properties will be addressed. In the theoretical models, semiconductor specificinteraction effects will be considered on a microscopic level.Based on the recently observed signatures of superradiant coupling between the emitters inquantum-dot lasers, the following applications will be studied:Generation of non-classical light with Super-Poisson-Statistics.Use of collective coupling effects between emitters for a laser-threshold reduction, for fasterlaser dynamics, as well as to facilitate stimulated emission with very low mean photon number.Improved coherence properties of the emission due to superradiant quantum-dot coupling.Light sources with improved coherence properties or non-classical photon statistics can be used infundamental quantum-optical effects as well as for applications in quantum informationtechnologies.

该项目的目的是开发用于半导体量子dotswhich的微观模型，可以用作新型的非经典光源中的活性材料。对于原子系统，最近已经证明了一个超级激光器，其中发射器的自发同步被用来强烈增加发射的光谱纯度。同时，该发射不是通过光子在谐振器中存储的，而不是作为发射体的相干阶段。在该项目中，将研究半导体量子系统的相应效果。在最近的文献中，几种理论和实验贡献都可以解决，这解决了量子点onphotolumeinence特性的超级偶联的影响。在该项目的过去阶段中，在激光系统中也发现了SuperradiantCoupling的明确签名。理论组和实验组之间的直接协作将用于识别系统和激发条件，在该条件下，量子点发射机的上级耦合播放了中央点。在常规激光器中，量子点的激发通过屏障状态发生。随后的放松导致DePhasing，将系统驱动到不连贯的状态。响应的量子点激发可用于强烈减小均匀的线宽度。后者小于腔线线宽度时，可以达到“不良为灾难度”的“不良为狂热”状态，以达到哪个原子化系统，可以表现出超级良好的las lass lassing。对于量子点系统，我们将研究是否能够克服不均质范围的有害影响。对于通过微腔交换光子的量子点，由于最近已经探索的非谐振点腔偶联效应可以减轻不均匀的脉冲。此外，与使用光泵的相应实验研究有关，将解决泵光的光子统计数据（相干与热辐射）对发射特性的影响。 In the theoretical models, semiconductor specificinteraction effects will be considered on a microscopic level.Based on the recently observed signatures of superradiant coupling between the emitters inquantum-dot lasers, the following applications will be studied:Generation of non-classical light with Super-Poisson-Statistics.Use of collective coupling effects between emitters for a laser-threshold reduction, for fasterlaser动力学以及促进平均光子数非常低的刺激发射。由于超级量子点耦合而引起的发射的重塑相干性能。光源具有改进的相干性能或非经典光子统计量的源，可以使用额量量子量的量子效应以及用于量子信息量的应用。

项目成果

Delayed formation of coherence in the emission dynamics of high-Q nanolasers

• DOI: 10.1364/optica.5.000395
• 发表时间: 2018-03
• 作者: G. Moody;Mawussey Segnon;I. Sagnes;R. Braive;A. Beveratos;I. Robert-Philip;N. Belabas;F. Jahnke;K. Silverman;R. Mirin;M. Stevens;C. Gies

Strong light-matter coupling in the presence of lasing

• DOI: 10.1103/physreva.96.023806
• 发表时间: 2016-06
• 期刊: Physical Review A
• 影响因子: 2.9
• 作者: C. Gies;F. Gericke;P. Gartner;S. Holzinger;C. Hopfmann;T. Heindel;J. Wolters;C. Schneider;M. Florian;F. Jahnke;S. Hofling;M. Kamp;S. Reitzenstein