Few-Photon Quantum Optics

少光子量子光学

• 批准号: 2440061
• 金额: --
• 依托单位: CARDIFF UNIVERSITY
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2020
• 资助国家: 英国
• 起止时间: 2020 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2440061
• 关键词: Few; Photon; Quantum; Optics

EPSRC Alignment: Grow & Maintain areas - / Condensed matter: electronic structure , Light matter interaction and optical phenomena , Materials engineering - composites , Optical devices and subsystems , Photonic materials , Quantum devices components and systems , Quantum optics and information. We will be studying the interactions, scattering and emission of quantum light within solid state devices. Photons are ideal carriers of quantum information, being fast, cheap and easy to encode with quantum-information carried in their polarisation, phase, time or path degrees of freedom. The challenge in developing useful applications of optical quantum technology is to demonstrate an advantage over classical systems when sources and detectors are not perfect. Applications in low light level imaging, secure communications and quantum computing are likely for devices to be developed. Amongst solid state quantum emitters, Indium-Gallium-Arsenide quantum dots offer the highest efficiency and purity but only at cryogenic temperatures. However, emitters in wide-bandgap materials, such as diamond and boron-nitride offer the unique capability to emit quantum light at room temperature. The focus of the project will be on increasing the efficiency, purity and repetition rate of single photon sources using novel designs of microcavity to alter the emission characteristics of the device. In year 1 of this project the student will design microcavities using a commercial photonics software package and create structures in the Institute for Compound Semiconductors cleanroom at Cardiff University. In Year 2 the student will optimise the photon collection apparatus to be portable, stable and efficient. The student will use the University's new superconducting single photon detectors, which have detection efficiency over 85% to single photons, to characterise their devices. In year 3 the student will define and develop prototype systems to demonstrate a quantum advantage over equivalent classical devices.

EPSRC排列：生长和维持领域-/凝聚态：电子结构、光物质相互作用和光学现象、材料工程-复合材料、光学器件和子系统、光子材料、量子器件组件和系统、量子光学和信息。我们将研究固态器件中量子光的相互作用、散射和发射。光子是量子信息的理想载体，它速度快、成本低，而且很容易用它们的偏振、相位、时间或路径自由度携带的量子信息进行编码。在开发光量子技术的有用应用方面的挑战是，在光源和探测器不完美的情况下，展示出相对于经典系统的优势。在微光成像、保密通信和量子计算方面的应用可能会被开发出来。在固态量子发射体中，铟-镓-砷化物量子点提供了最高的效率和纯度，但仅在低温下。然而，宽禁带材料中的发射体，如钻石和氮化硼，提供了在室温下发射量子光的独特能力。该项目的重点将是利用新颖的微腔设计来改变器件的发射特性，以提高单光子源的效率、纯度和重复率。在这个项目的第一年，学生将使用商业光子学软件包设计微腔，并在卡迪夫大学化合物半导体研究所的洁净室创建结构。在第二年，学生将优化光子收集设备，使其轻便、稳定和高效。这名学生将使用该大学新的超导单光子探测器，这种探测器对单光子的探测效率超过85%，来描述他们的设备。在第三年，学生将定义和开发原型系统，以证明量子系统相对于同等的经典设备具有优势。