Fibre Wavelength Quantum Light Sources

光纤波长量子光源

• 批准号: EP/M508275/1
• 负责人: Jon Heffernan
• 金额: $ 12.8万
• 依托单位: University of Sheffield
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2015
• 资助国家: 英国
• 起止时间: 2015 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FM508275%2F1
• 关键词: Fibre; Wavelength; Quantum; Light; Sources

The Sheffield team and the National Centre for III-V technologies will develop quantum dot single photon emitters forQuantum Communications. The overall project aims are to demonstrate the controlled emission of entangled photons froman LED structure emitting at a fibre-compatible wavelengths. Devices operating at this wavelength will be required toachieve commercially significant Quantum Communications technologies. There is a significant epitaxy challenge indeveloping this technology by Metal Organic Vapour Phase Epitaxy (MOVPE) at these wavelengths and there have beenno demonstrations of entangled LEDs to date.The Sheffield team will develop Indium Arsenide on Indium Phosphide quantum dots by MOVPE , complementing andcontrasting with the development by the Molecular Beam Epitaxy (MBE) method in the Cavendish laboratory. Todemonstrate single photon emitters at these wavelengths is challenging and there is a need to investigate the properties ofthe quantum dots by both techniques to understand how the quantum dots form and what controls the fundamentalproperties that will generate photon entanglement; including aspects such as the exciton spin splitting value. The work willbuild significantly on the prior work carried out at shorter wavelengths in Sheffield, Toshiba and Cavendish laboratoriesusing a different material system. In particular at Sheffield the result of quantum dot structures developed under an EPSRCProgramme Grant will benefit the project strongly since many of the physical properties may be similar. The demonstrationof high quality devices at this wavelength will be a significant milestone in matching Quantum Communications to thecurrent non-quantum fibre-communications infrastructure.

谢菲尔德团队和国家 III-V 技术中心将为量子通信开发量子点单光子发射器。整个项目的目标是演示 LED 结构中纠缠光子的受控发射，该结构以光纤兼容的波长进行发射。需要在该波长下运行的设备才能实现具有商业意义的量子通信技术。在这些波长下通过金属有机气相外延 (MOVPE) 开发这项技术面临着重大的外延挑战，并且迄今为止还没有纠缠 LED 的演示。谢菲尔德团队将通过 MOVPE 在磷化铟量子点上开发砷化铟，与卡文迪什实验室通过分子束外延 (MBE) 方法开发。演示这些波长的单光子发射器具有挑战性，需要通过这两种技术研究量子点的特性，以了解量子点的形成方式以及控制产生光子纠缠的基本特性的因素；包括激子自旋分裂值等方面。这项工作将在很大程度上建立在谢菲尔德、东芝和卡文迪什实验室使用不同材料系统在较短波长下进行的先前工作的基础上。特别是在谢菲尔德，在 EPSRC 计划资助下开发的量子点结构的结果将使该项目受益匪浅，因为许多物理特性可能是相似的。该波长的高质量设备的演示将是量子通信与当前非量子光纤通信基础设施相匹配的一个重要里程碑。

项目成果

InAs/InP Quantum Dots in Etched Pits by Droplet Epitaxy in Metalorganic Vapor Phase Epitaxy

• DOI: 10.1002/pssr.202000173
• 发表时间: 2020-06
• 期刊: physica status solidi (RRL) – Rapid Research Letters
• 作者: E. Sala;Young In Na;M. Godsland;A. Trapalis;J. Heffernan

Coherence in single photon emission from droplet epitaxy and Stranski-Krastanov quantum dots in the telecom C-band

• DOI: 10.1063/5.0032128
• 发表时间: 2021-01-04
• 期刊: APPLIED PHYSICS LETTERS
• 影响因子: 4
• 作者: Anderson, M.;Mueller, T.;Shields, A. J.
• 通讯作者: Shields, A. J.

Universal Growth Scheme for Quantum Dots with Low Fine-Structure Splitting at Various Emission Wavelengths

• DOI: 10.1103/physrevapplied.8.014013
• 发表时间: 2017-07-14
• 期刊: PHYSICAL REVIEW APPLIED
• 影响因子: 4.6
• 作者: Skiba-Szymanska, Joanna;Stevenson, R. Mark;Shields, Andrew J.
• 通讯作者: Shields, Andrew J.