Deep ultraviolet LED devices for few-photon optical communications and imaging

用于少光子光通信和成像的深紫外 LED 器件

• 批准号: 2272761
• 金额: --
• 依托单位: University of Strathclyde
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2019
• 资助国家: 英国
• 起止时间: 2019 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2272761
• 关键词: Deep; ultraviolet; LED; devices; few

The Institute of Photonics is a recognized international pioneer of micro-LEDs, arrays of micron-sized light-emitting diodes constituting a new high-brightness microdisplay and backlighting technology - being applied, for example, to advanced virtual and augmented reality headsets. These displays interface to CMOS electronics and can be modulated at very high (megahertz) frame rates and communicate data at gigabits/second. Such rapidly modulated patterned light enables a form of optical projection called structured illumination with applications in indoor navigation, spatially modulated data communications, single pixel imaging and bio-imaging. These GaN microdisplays are extremely energy efficient and can be run with ultra-low photon flux. By coupling these displays with high speed single photon avalanche detector (SPAD) arrays, we have demonstrated a unique method for the spatio-temporal encoding of information at the few photon level that is extremely robust to noise. Initial demonstrations of simple data transmission, with efficiencies in the order of 30 photons per bit, have already garnered significant interest from the scientific and industrial communities. This project will develop novel formats of these devices operating at deep ultraviolet wavelengths (<280nm). At these wavelengths, the earth's atmosphere is highly scattering and opaque to solar radiation. This offers the possibility of 'communicating around corners' at very low light levels or communicating between satellites at wavelengths that cannot be seen from the ground. It also offers novel forms of microscopy system with high resolution and sensitivity to surfaces and interfaces. The project will encompass optical systems design and development, electronic driver and software coding and sparse data signal processing techniques. The PhD student will have access to state-of-the-art, custom LED and SPAD array devices, optical characterisation facilities and software tools, and will contribute to the UK's national programme on Quantum Technologies.

光子学研究所是公认的微型LED的国际先驱，微米尺寸的发光二极管阵列构成了一种新的高亮度微显示器和背光技术-例如，应用于先进的虚拟和增强现实耳机。这些显示器与CMOS电子器件接口，可以以非常高的帧速率（兆赫）进行调制，并以千兆比特/秒的速度传输数据。这种快速调制的图案化光实现了一种称为结构化照明的光学投影形式，其应用于室内导航、空间调制数据通信、单像素成像和生物成像。这些GaN微显示器具有极高的能效，可以在超低光子通量下运行。通过将这些显示器与高速单光子雪崩探测器（SPAD）阵列耦合，我们已经证明了一种独特的方法，用于在少数光子水平上对信息进行时空编码，该方法对噪声非常鲁棒。简单数据传输的初步演示，每比特30个光子的效率，已经引起了科学界和工业界的极大兴趣。该项目将开发在深紫外波长（<280 nm）下工作的这些设备的新格式。在这些波长下，地球大气层高度散射，对太阳辐射不透明。这提供了在非常低的光照水平下进行“角落通信”或在地面看不到的波长下在卫星之间进行通信的可能性。它还提供了新形式的显微镜系统，具有高分辨率和对表面和界面的灵敏度。该项目将包括光学系统设计和开发、电子驱动器和软件编码以及稀疏数据信号处理技术。博士生将有机会获得最先进的定制LED和SPAD阵列设备，光学表征设施和软件工具，并将为英国的量子技术国家计划做出贡献。