Ultrafast spectroscopy of semiconductor quantum dots

--研究背景的简要说明，包括潜在的影响这项研究将在EPSRC“半导体量子光子学：纳米光子设计对自旋、激子和光子相互作用的控制”计划拨款的背景下进行。学生资格将集中在“自旋量子比特”的WP2上。这项研究对开发可以在固态平台上应用于量子技术的新型半导体设备具有潜在的影响。-目的和目标-目的是展示对半导体量子点中电子和/或空穴自旋的芯片上相干控制。-研究方法，包括将被研究的工程和物理科学中的新知识或技术。该方法基于使用短激光脉冲操纵自旋的光学技术。电子或空穴将被限制在半导体量子点中，利用纳米光子学将增强光与物质的相互作用。实现这些目标将需要开发一些新技术：*设计具有与纳米光子制造兼容的明确电荷状态的量子点晶片*设计用于光子输入和输出耦合的优化光子结构，并使用纳米光子腔和波导最大化光与物质的相互作用。*研究纳米光子结构中的自旋相干性*开发相干光学控制自旋排列的技术--与EPSRC的战略和研究领域相一致。该计划拨款由EPSRC的光子材料领域提供资金，并将提供给量子技术计划。

- Brief description of the context of the research including potential impactThe research will be carried out within the context of the EPSRC Programme Grant on "Semiconductor Quantum Photonics: Control of Spin, Exciton and Photon Interactions by Nano-Photonic Design." The studentship will be focussed on WP2 of the grant on "Spin qubits". The research has potential impact to develop new semiconductor devices that can be implemented in solid-state platforms for applications in quantum technologies.- Aims and objectivesThe aim is to demonstrate on-chip coherent control of electron and/or hole spins in semiconductor quantum dots.- The research methodology, including new knowledge or techniques in engineering and physical sciences that will be investigatedThe methodology is based on optical techniques for manipulating spins using short laser pulses. The electrons or holes will be confined in semiconductor quantum dots, and the light-matter interaction will be enhanced using nano-photonics. The achievement of the goals will require development of a number of new techniques:* design of quantum dot wafers with well-defined charge states that are compatible with nano-photonic fabrication* design of optimised photonic structures for in- and out-coupling of photons and maximisation of the light-matter interaction using nano-photonic cavities and waveguides.* investigation of the spin coherence in the nano-photonic structures* development of techniques for the coherent optical control of spins- Alignment to EPSRC's strategies and research areasThe programme grant is funded by EPSRC's Photonic Materials area, and will feed into the quantum technologies programme.