Developing a tunable single-spin bit for scalable spin-based optoelectronics
开发用于可扩展的基于自旋的光电子学的可调谐单自旋位
基本信息
- 批准号:1101754
- 负责人:
- 金额:$ 36万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Standard Grant
- 财政年份:2011
- 资助国家:美国
- 起止时间:2011-04-01 至 2014-03-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
Electronic and photonic devices that operate at the quantum limit will enable many new technologies, including ultrafast photonic switches, fundamentally secure communication, and quantum information processing. Efforts to engineer single-spin optoelectronic devices based on single quantum dots have faced significant challenges because ensembles of quantum dots always have a large inhomogeneous distribution in energy levels. The distribution in energy levels prevents spin bits based on single quantum dots from being integrated into multi-bit devices where each bit must be tuned into resonance with a discrete number of fixed laser or optical cavity wavelengths. Recent discoveries have demonstrated that quantum dot molecules have optical transitions whose wavelength can be tuned in situ over a range ten times larger than available in present single-spin bit designs. Moreover, these quantum dot molecules have other tunable optoelectronic and spin properties that can be engineered at the single-spin quantum level. This program supports development of a prototype bit, based on quantum dot molecules, that can isolate and control a single spin. Coherent and time-resolved magneto-optical techniques will be used to develop and demonstrate operation of this prototype bit and quantify the wavelength tunability that can be achieved. The results will provide a direct path to the production of scalable spin-based optoelectronic devices. Intellectual MeritSingle quantum dots are being actively pursued for integration into photonic and spin-based optoelectronic devices, but the inhomogeneous distribution of energy levels in ensembles of single quantum dots provides a fundamental barrier to scalability. This limitation can be overcome with the proposed new single-spin bit design based on quantum dot molecules. The key element of the proposed bit architecture is the use of indirect optical transitions whose wavelength is an order of magnitude more sensitive to applied electric field than the transitions of single quantum dots. Experiments have shown that these indirect transitions can have dipole matrix elements only a few times weaker than direct transitions. Spin initialization, manipulation and readout methods that utilize the indirect transitions will be developed. The range of wavelength tunability that can be achieved while maintaining spin initialization and readout will be measured. The bit design and spin-control protocols take advantage of recently discovered tunable spin interactions in quantum dot molecules to eliminate the need for transverse magnetic fields and incorporate nondestructive readout. The proposed work will develop and demonstrate a spin-bit design with at least an order of magnitude more wavelength tunability than existing spin-bit designs and consequently eliminate one of the largest obstacles to the scalable production of single-spin-based optoelectronic devices. Broader ImpactsThe proposed work will enrich new courses already under development and provide crucial training for graduate students who will lead the next generation of electronic and photonic device research. The work will further broaden the exposure and opportunities for undergraduates and teacher-scholars participating in summer research programs. Funds from this program will provide local K-12 teachers with equipment to bring cutting-edge scientific concepts into their classrooms and inspire the next generation of students to pursue careers in STEM fields.
在量子极限下运行的电子和光子器件将使许多新技术成为可能,包括超快光子交换机、从根本上安全的通信和量子信息处理。设计基于单量子点的单自旋光电器件的努力面临着重大挑战,因为量子点的集合总是在能级上具有很大的不均匀分布。能级的分布阻止了基于单量子点的自旋位被集成到多位器件中,在多位器件中,每个位必须被调谐到与离散数量的固定激光器或光学腔波长共振。最近的发现表明,量子点分子具有光学跃迁,其波长可以在比目前单自旋位设计大十倍的范围内原位调谐。此外,这些量子点分子还具有其他可调的光电和自旋特性,可以在单自旋量子水平上进行工程设计。该计划支持基于量子点分子的原型位的开发,可以隔离和控制单个自旋。相干和时间分辨磁光技术将用于开发和演示这个原型位的操作,并量化可以实现的波长可调谐性。这些结果将为可扩展的基于自旋的光电器件的生产提供直接途径。单量子点正被积极地用于集成到光子和基于自旋的光电器件中,但是单量子点集合中能级的不均匀分布提供了可扩展性的基本障碍。这种限制可以通过基于量子点分子的新单自旋位设计来克服。所提出的位架构的关键要素是使用间接光学跃迁,其波长比单个量子点的跃迁对施加的电场更敏感一个数量级。实验表明,这些间接跃迁的偶极矩阵元只比直接跃迁弱几倍。将开发利用间接跃迁的自旋初始化、操纵和读出方法。将测量在保持自旋初始化和读出的同时可以实现的波长可调谐性的范围。比特设计和自旋控制协议利用了最近发现的量子点分子中的可调自旋相互作用,以消除对横向磁场的需要并结合非破坏性读出。拟议的工作将开发和展示一种自旋位设计,其波长可调谐性比现有的自旋位设计至少高一个数量级,从而消除了基于单自旋的光电器件可规模化生产的最大障碍之一。更广泛的影响拟议的工作将丰富新的课程已经在开发中,并提供关键的培训,研究生谁将领导下一代电子和光子器件的研究。这项工作将进一步扩大本科生和教师学者参加夏季研究计划的曝光和机会。该计划的资金将为当地K-12教师提供设备,将尖端的科学概念带入课堂,并激励下一代学生追求STEM领域的职业生涯。
项目成果
期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
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Matthew Doty其他文献
Matthew Doty的其他文献
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{{ truncateString('Matthew Doty', 18)}}的其他基金
S-STEM Collaborative Planning Grant: An accelerated 3+2 pathway to BS and MS degrees in Semiconductor Manufacturing and Quantum Science disciplines
S-STEM 协作规划补助金:获得半导体制造和量子科学学科学士和硕士学位的加速 3 2 途径
- 批准号:
2322670 - 财政年份:2023
- 资助金额:
$ 36万 - 项目类别:
Standard Grant
RAISE-TAQS: Inverting the design paradigm: Tunable qubits in hybrid photonic materials as a scalable platform for quantum photonic devices
RAISE-TAQS:反转设计范式:混合光子材料中的可调谐量子位作为量子光子器件的可扩展平台
- 批准号:
1839056 - 财政年份:2018
- 资助金额:
$ 36万 - 项目类别:
Standard Grant
OP: Spatial and spectral control of quantum dot single photon emitters for scalable photonic devices
OP:用于可扩展光子器件的量子点单光子发射器的空间和光谱控制
- 批准号:
1609157 - 财政年份:2016
- 资助金额:
$ 36万 - 项目类别:
Standard Grant
MRI: Development of a system for low temperature optical measurement of 3D magnon, plasmon and spin torque transfer dynamics.
MRI:开发用于 3D 磁振子、等离激元和自旋扭矩传递动力学低温光学测量的系统。
- 批准号:
1624976 - 财政年份:2016
- 资助金额:
$ 36万 - 项目类别:
Standard Grant
Collaborative Research: Spin Physics `by design' in quantum dot molecules
合作研究:量子点分子中“设计”的自旋物理
- 批准号:
1505574 - 财政年份:2015
- 资助金额:
$ 36万 - 项目类别:
Continuing Grant
CAREER: Controllable Coupling of Quantum Dots in Scalable Architectures
职业:可扩展架构中量子点的可控耦合
- 批准号:
0844747 - 财政年份:2009
- 资助金额:
$ 36万 - 项目类别:
Continuing Grant
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