An Atomic Force Microscopy study of buried InAs/GaAs quantum-dot single-photon sources

掩埋 InAs/GaAs 量子点单光子源的原子力显微镜研究

基本信息

批准号：
EP/P001343/1
负责人：
Luca Sapienza
金额：
$ 1.84万
依托单位：
University of Southampton
依托单位国家：
英国
项目类别：
Research Grant
财政年份：
2016
资助国家：
英国
起止时间：
2016 至无数据
项目状态：
已结题

来源：
https://gtr.ukri.org/projects?ref=EP%2FP001343%2F1
关键词：
Atomic Force Microscopy study buried

项目摘要

Conventional light sources emit a large number of photons in a wide angular range and are mainly used for illumination or imaging purposes. Technological advances have allowed the dimensions of the components of devices to be reduced to the nanometre scale, and intriguing quantum mechanical effects have come into play. We are now able to manipulate matter at the atomic level and generate single photons, the smallest constituents of light, on-demand. The ability to control light emission at its smallest level, the single photon, is technologically challenging but tremendously interesting. The next revolution in communication is expected to take place by implementing quantum devices where light-matter interaction is engineered such that information can be stored in single photons that circulate between optical cavities within a photonic network. Given their scalability and the possibility of on-chip integration, solid-state single-photon sources are expected to be the building blocks of these novel quantum architectures. If we can store information on a single photon level, we can transfer it at the speed of light with a guaranteed secure communication: any measurement by an unwanted observer will leave a trace that will be visible to the receiver, thus unveiling the steal of information. However, several challenges are still limiting the implementation of quantum information technology in everyday life: the emitted photons only preserve their properties over a very short time-scale, often requiring cryogenic-cooled emitters excited by external lasers, and networks where information can be efficiently stored and shared are still lacking.In this project we will investigate how the presence of nanometre-scale emitters buried within a semiconductor slab affects the surface morphology and how this, in return, impacts the properties of the single photons emitted. The outcome of this work will represent a step forward in the understanding of the emission properties of quantum light sources, allowing to improve the quality and reliability of single-photon emission, essential for information technology applications, like quantum computing and cryptography.

常规的光源在宽的角范围内散发出大量光子，主要用于照明或成像目的。技术的进步使设备组件的尺寸降低到纳米量表，并且有趣的量子机械效应已经发挥作用。现在，我们能够在原子水平上操纵物质，并产生单个光子，即最小的光，点播。在最小的水平（单个光子）上控制光发射的能力在技术上具有挑战性，但非常有趣。预计下一次通信革命将通过实施量子设备进行工程，以便将信息存储在光子网络中的光腔之间的单个光子中。鉴于它们的可伸缩性和芯片积分的可能性，固态单光子源预计将是这些新型量子体系结构的基础。如果我们可以在单个光子级别上存储信息，我们可以以保证的安全通信的速度以光速传输信息：不需要的观察者的任何测量都会留下接收器可见的痕迹，从而揭示信息的窃取。 However, several challenges are still limiting the implementation of quantum information technology in everyday life: the emitted photons only preserve their properties over a very short time-scale, often requiring cryogenic-cooled emitters excited by external lasers, and networks where information can be efficiently stored and shared are still lacking.In this project we will investigate how the presence of nanometre-scale emitters buried within a semiconductor slab affects the surface morphology and作为回报，这如何影响发出的单个光子的特性。这项工作的结果将代表了解量子光源的发射特性的一步，从而可以提高单光子发射的质量和可靠性，这对于信息技术应用至关重要，例如量子计算和加密。