Control of non-classical light states by linear and non-linear interaction in hybrid systems of single semiconductor quantum dots and alkali atomic vapor

单半导体量子点和碱原子蒸气混合系统中线性和非线性相互作用对非经典光态的控制

• 批准号: 281308554
• 负责人: Dr. Robert Löw
• 金额: --
• 依托单位: Institut für Halbleiteroptik und Funktionelle Grenzflächen (IHFG)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2016
• 资助国家: 德国
• 起止时间: 2015-12-31 至 2019-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/281308554?language=en
• 关键词: Control; non; classical; light; states

The central aim of the proposed research project is the realization and detailed investigation of new hybrid concepts and schemes which provide control to generate and/or manipulate non-classical states of light by distinct interaction between photons emitted from single semiconductor-quantum dots (QDs) and alkali atomic vapor as the control medium. The fundamental basis for all planned investigations is the generation of spectrally narrow-band resonance fluorescence (RF) from individual single Indium-Gallium-Arsenide (InGaAs)-QDs as a source of photons which can be brought to controlled interaction with the optical resonances of atomic cesium (133Cs) at ~894 nm (D1 hyperfine structure quadruplet). One important prerequisite for sophisticated QD-atom interaction experiments will be a precise tuning capability of RF with respect to the fixed atomic reference frequencies of the D1 hyperfine structure. The efficiency of (non-)linear interactions will critically depend on the mutual spectral similarity between the photon source and the spectral response characteristics of the thermal atomic gas, dominated by Doppler broadening, which acts as the control medium. Therefore, another very important aspect will be to gain flexible control on the RF emission linewidth in order to adjust its bandwidth to the atomic transitions. In this project, we plan to utilize different conditioning techniques, i.e. (a) deterministic pi-pulsed optical QD excitation, (b) direct generation of ultra-narrowband sub-Poissonian RF by coherent, elastic photon scattering on a single QD in the weak excitation regime (Heitler regime), and (c) spectral post-filtering of single-QD RF from the regimes of pi-pulsed and also cw-dressed emission above saturation. This can be achieved by using a specially designed high-finesse Fabry-Pérot interferometer, or alternatively, for the first time in combination with QD-RF, the technique of FADOF-type (Faraday anomalous dispersion optical filter) transmission filtering. Using such conditioned photons, the anticipated goals of the project focus on fundamental applications in the field of optical quantum information processing. One of our aimed applications will be controlled single-photon storage and delay by generation of slow light within the strongly dispersive frequency regime between selected Cs-D1 resonances and storage via an off-resonant Raman-scheme. The second major goal of the project focuses at the manipulation of stored photons and the generation of higher-order photon number (Fock) states by using cesium atomic vapor in combination of highly excited Rydberg gas medium with controllably attractive or repulsive atom-atom interaction. A Rydberg gas can act e.g., as an optical transistor for two individual photons to merge into a common mode channel. The effect of photon-photon scattering can be controlled externally by an appropriate Rydberg pump laser for the atomic medium.

拟议的研究项目的中心目标是实现和详细调查新的混合概念和计划，这些概念和计划提供控制，以产生和/或操纵光的非经典状态，通过从单个量子点（QD）和碱原子蒸汽作为控制介质发射的光子之间的独特相互作用。所有计划研究的基本基础是从单个铟镓砷化物（InGaAs）量子点产生光谱窄带共振荧光（RF），作为光子源，可以与原子铯（133 Cs）在~894 nm（D1超精细结构四重态）的光学共振进行受控相互作用。复杂的量子点-原子相互作用实验的一个重要先决条件是RF相对于D1超精细结构的固定原子参考频率的精确调谐能力。（非）线性相互作用的效率将主要取决于光子源和热原子气体的光谱响应特性之间的相互光谱相似性，其由作为控制介质的多普勒展宽主导。因此，另一个非常重要的方面将是获得对RF发射线宽的灵活控制，以便根据原子跃迁调整其带宽。在这个项目中，我们计划利用不同的调节技术，即（a）确定性的π脉冲光量子点激发，（B）直接产生的超窄带亚泊松RF相干，弹性光子散射在一个单一的量子点在弱激发制度（海特勒制度），和（c）光谱后过滤的单量子点RF从π脉冲和cw装饰发射高于饱和的制度。这可以通过使用专门设计的高精细度法布里-珀罗干涉仪来实现，或者第一次与QD-RF相结合，FADOF型（法拉第反常色散光学滤波器）传输滤波技术。利用这种条件光子，该项目的预期目标集中在光量子信息处理领域的基础应用上。我们的目标应用之一将是通过在选定的Cs-D1共振和非共振拉曼方案存储之间的强色散频率范围内产生慢光来控制单光子存储和延迟。该项目的第二个主要目标集中在操纵存储的光子和高阶光子数（Fock）状态的产生，通过使用铯原子蒸气结合高度激发的里德伯气体介质与可控的吸引或排斥原子-原子相互作用。里德伯气体可以起作用，例如，作为用于两个单独的光子合并到共模通道中的光学晶体管。光子-光子散射的效应可以通过原子介质的适当的里德伯泵浦激光来外部控制。

项目成果

Characterization of spectral diffusion by slow-light photon-correlation spectroscopy

• DOI: 10.1103/physrevb.101.161401
• 发表时间: 2020-04
• 期刊: Physical Review B
• 影响因子: 3.7
• 作者: H. Vural;J. Maisch;I. Gerhardt;M. Jetter;S. Portalupi;P. Michler

Two-photon interference in an atom–quantum dot hybrid system

原子量子点混合系统中的双光子干涉

• DOI: 10.1364/optica.5.000367
• 发表时间: 2018
• 作者: H. Vural;S. L. Portalupi;J. Maisch;S. Kern;J. H. Weber;M. Jetter;J. Wrachtrup;R. Löw;I. Gerhardt;P. Michler
• 通讯作者: P. Michler

Controllable Delay and Polarization Routing of Single Photons

单光子的可控延迟和偏振路由

• DOI: 10.1002/qute.201900057
• 发表时间: 2019
• 期刊: Advanced Quantum Technologies
• 影响因子: 4.4
• 作者: J. Maisch;H. Vural;M. Jetter;P. Michler;I. Gerhardt;S. L. Portalupi
• 通讯作者: S. L. Portalupi