quantum optics at telecoms wavelengths

这个博士项目将主要包括在1530 nm和1565 nm之间发射的量子点（QDs）的很少研究区域的光学测量。这个波长范围被称为电信c波段，光纤的吸收最低。光学测量将表征量子点并旨在证明单光子发射。这样的特性将评估它们在使用量子加密的完全安全通信方案中作为单光子源的适用性。学生将学习器件制造技术，以制造允许发射波长调谐的结构和增强量子点发射的结构。该项目的成果是证明量子点是与现有电信基础设施兼容的约1550纳米单光子的通用源。

This PhD project will mainly consist of optical measurements of little-studied area of quantum dots (QDs) emitting between 1530 nm and 1565 nm. This wavelength range is known as the telecoms C-band where absorption in optical fibres is lowest. The optical measurements will characterise the QDs and aim to demonstrate single photon emission. Such characterisation will assess their suitability as single photon sources in fully secure communication schemes that use quantum cryptography. The student will learn device fabrication techniques to fabricate structures that will allow for emission wavelength tuning and structures that will enhance the emission of the QDs. The project outcome is to demonstrate the QDs as a versatile source of single photons at around 1550 nm compatible with the existing telecommunication infrastructure.