Semiconductor quantum nano-photonics

半导体量子纳米光子学

• 批准号: 2107994
• 金额: --
• 依托单位: University of Sheffield
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2018
• 资助国家: 英国
• 起止时间: 2018 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2107994
• 关键词: Semiconductor; quantum; nano; photonics

- Brief description of the context of the research including potential impactThis PhD will involve the study of quantum nano-photonic systems consisting of semiconductor quantum dots (QDs) embedded in on-chip waveguides. Strong, near deterministic, interactions between photons in the waveguides and the QD 2-level system give rise to strong non-linearities that can be harnessed for quantum logic. The system is scalable, allowing the investigation of entanglement generation by bringing several QDs onto resonance through a combination of local strain tuning and electric field tuning of the QD energy levels. Success in these areas would represent a major step forward in quantum information science, providing a route to on-chip quantum networks.- Aims and objectivesCarry out the first waveguide QED studies for a single QD in a nano-photonic waveguide using short optical pulses to provide detailed time-resolved information.Use HfO coated waveguides with laser-induced crystallisation to locally strain the QDs in both nanobeam and photonic crystal waveguides. Determine optimum exposure conditions to achieve controllable shifts.Carry out studies of entanglement generation in waveguides with 2 or more QDs tuned into resonance using strain plus electric-field tuning.Investigate the operation of more sophisticated nano-photonic systems, incorporating on-chip Mach Zehnder interferometers, for use as quantum phase gates.- The research methodology, including new knowledge or techniques in engineering and physical sciences that will be investigated Requires a combination of state-of-the-art device fabrication using electron beam lithography, atomic layer deposition of HfO and quantum optics using narrowband/ pulsed laser excitation with ultrasensitive detection. All equipment is in-place but new techniques will be developed in pulsed excitation and strain tuning using HfO, with new knowledge coming from all studies.- Alignment to EPSRC's strategies and research areasClosely aligned with quantum technologies, physical sciences and ICT themes. Specifically related to Quantum Devices, Components and Systems as well as Light Matter Interaction and Optical Phenomena research areas.- Any companies or collaborators involved'Collaboration with Glasgow University for HfO deposition.

- 简要描述了研究的背景，包括潜在的影响这个博士学位将涉及量子纳米光子系统的研究，该系统由嵌入在芯片波导中的半导体量子点（QD）组成。波导中的光子和量子点2能级系统之间的强的、接近确定性的相互作用产生了强的非线性，可以用于量子逻辑。该系统是可扩展的，允许调查的纠缠产生，通过本地应变调谐和电场调谐的QD能级的组合，使几个量子点上的共振。这些领域的成功将代表量子信息科学向前迈出的重要一步，为片上量子网络提供了一条途径。目的和目标首次对纳米光子波导中的单个量子点进行波导QED研究，利用短光脉冲提供详细的时间分辨信息，利用HfO涂层波导和激光诱导结晶对纳米梁和光子晶体波导中的量子点进行局部应变。确定最佳曝光条件，以实现可控位移。研究在波导中产生纠缠，其中使用应变加电场调谐将两个或更多个量子点调谐到谐振状态。研究更复杂的纳米光子系统的操作，将芯片上的马赫曾德尔干涉仪用作量子相位门。研究方法，包括新的知识或技术在工程和物理科学，将被调查需要国家的最先进的设备制造使用电子束光刻，原子层沉积的HfO和量子光学使用窄带/脉冲激光激发与超灵敏检测的组合。所有设备都已到位，但将使用HfO开发脉冲激励和应变调谐的新技术，并从所有研究中获得新知识。与EPSRC的战略和研究领域保持一致与量子技术，物理科学和ICT主题保持一致。具体涉及量子器件，组件和系统以及光物质相互作用和光学现象研究领域。与格拉斯哥大学合作沉积HfO的任何公司或合作者。