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GaSb/GaAs quantum rings as single photon sources

GaSb/GaAs 量子环作为单光子源

基本信息

批准号：
EP/M50838X/1
负责人：
Manus Hayne
金额：
$ 14.66万
依托单位：
Lancaster University
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%2FM50838X%2F1
关键词：
GaSb GaAs quantum rings single

项目摘要

Quantum technologies are those which exploit the exotic properties of nature described by quantum mechanics to deliverdevices with unprecedented speed or accuracy compared with conventional technology, or even generate completely noveltechnologies with new functionalities, which simply do not exist at present. Quantum cryptography is one such technology:communication whose security is guaranteed by fundamental laws of quantum mechanics. The implementation of quantumcryptography relies on the ability to generate single photons of light on demand. Several different physical systems havebeen used to generate single photons, but very few of them are suitable for commercial production as they are impracticaland inconvenient. An ideal single photon source should be fast, cheap, operate at room temperature, and emit photons atthe wavelengths used in existing optical-fibre based telecommunications systems. In fact, a practical single photon sourceis expected to look very like a type of semiconductor laser diode called a vertical cavity surface emitting laser (VCSEL). Inthis year-long project we will assess the feasibility of mass-producing low-cost, room-temperature single photon sourceswith telecom-wavelength emission by developing novel VCSEL devices whose active regions incorporate tinysemiconductor nanostructures called self-assembled quantum rings. This will allow us to leap-frog a stage in thedevelopment of practical, i.e. commercial, single photon sources, and to make a realistic assessment of their commercialpotential.

量子技术是利用量子力学所描述的奇异性质，以前所未有的速度或精度提供与传统技术相比的设备，甚至产生具有新功能的全新技术，这些技术目前根本不存在。量子密码就是这样一种技术：通信的安全性由量子力学的基本定律保证。量子密码学的实现依赖于按需产生单光子的能力。几种不同的物理系统已经被用来产生单光子，但它们中很少有适合商业生产的，因为它们不实用且不方便。一个理想的单光子源应该是快速、廉价、在室温下工作，并且发射的光子波长与现有的基于光纤的电信系统所使用的波长相同。实际上，一个实用的单光子源看起来非常像一种称为垂直腔面发射激光器（VCSEL）的半导体激光二极管。在这个为期一年的项目中，我们将评估大规模生产低成本、室温单光子源的可行性，通过开发新型VCSEL器件，其有源区包含称为自组装量子环的微小半导体纳米结构。这将使我们能够跨越一个阶段，在实际的，即商业，单光子源的发展，并作出现实的评估其商业潜力。