Optical Processing of Information in Doped Semiconductors

掺杂半导体中信息的光学处理

• 批准号: 0605801
• 负责人: Carlo Piermarocchi
• 金额: $ 33万
• 依托单位: Michigan State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2006
• 资助国家: 美国
• 起止时间: 2006-09-15 至 2009-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0605801&HistoricalAwards=false
• 关键词: Optical; Processing; Information; Doped; Semiconductors

TECHNICAL SUMMARY:This award supports theoretical research and education on fundamental phenomena in condensed matter and materials. It contributes to the intellectual foundations of future cyberinfrastructure. The PI seeks a better understanding of coherent photo-magnetism in semiconductor nanostructures. The control of magnetization of a medium by ultra-fast laser pulses may be an efficient way to provide fast memories and information processing. In many magneto-optic devices, the control of the magnetization is realized through thermal effects produced by the absorption of light or by photo-doping. In this project, the PI will investigate the theory of much faster non-thermal and non-dissipative control methods in which the light is not absorbed by the medium. Given recent advances in nano-optics techniques, this coherent optical control can be realized at the nano-scale.The PI will investigate coherent photo-magnetic effects in bulk, quantum dots, and micro-cavities. He plans to consider nano-systems based on Mn-doped semiconductors, which are currently being investigated for their ferromagnetic properties. Light can induce magnetic phase transitions in these materials and it can also control the critical temperature and the orientation of magnetization. The PI aims to identify materials, structures, and control parameters for an optimal implementation of this coherent control, and to address fundamental questions on the nature of ferromagnetism and phase transitions under strong and non-equilibrium light-matter coupling.The project will involve collaborations with theorists and experimentalists in the EU and in the US. With cofunding from the Europe and Eurasia Program in OISE, the PI aims to initiate collaboration with a theorist in Greece and provide international research experience for students. Graduate and undergraduate students will be involved in the project and will be trained in quantum optics, solid state physics and statistical mechanics. The research involves the development of a suite of computational tools for the calculation of the nonlinear optical properties of magnetic semiconductors that will be made public. The involvement of students in the development of those tools will enable them to expand their skills in designing numerical codes to solve complex problems.NON-TECHNICAL SUMMARY:This award supports theoretical research and education on fundamental phenomena in condensed matter and materials. It contributes to the intellectual foundations of future cyberinfrastructure. The PI will investigate how quantum mechanical states in materials can be manipulated by lasers and the novel phenomena that arise as a consequence. Of particular interest is the mechanism through which light can manipulate magnetic states of impurities in semiconductors and nanostructures and new phenomena that can arise. The PI aims to address fundamental questions on the nature of ferromagnetism and phase transitions as a consequence of the strong interaction of light with materials.Optical control suggests an intriguing active approach to materials science: the goal of such studies lies beyond the investigation of the general optical properties of materials, and directly focuses on fundamental condensed matter and quantum phenomena that may lead to the design of optical devices with a functional role in, for example, memories, information processors, or network components. This project may impact information technology by laying the intellectual foundations of phenomena that may lead to new, non-dissipative and reversible methods of computation and data storage, based on light. These coherent control schemes will suggest new ideas for quantum computing implementations, as well as for present technology applications, such as magneto-optical recording or tunable magnetic switches and amplifiers.The project will involve collaborations with theorists and experimentalists in the EU and in the US. With cofunding from the Europe and Eurasia Program in OISE, the PI aims to initiate collaboration with a theorist in Greece and provide international research experience for students. Graduate and undergraduate students will be involved in the project and will be trained in quantum optics, solid state physics and statistical mechanics. The research involves the development of a suite of computational tools for the calculation of the nonlinear optical properties of magnetic semiconductors that will be made public. The involvement of students in the development of those tools will enable them to expand their skills in designing numerical codes to solve complex problems.

技术概述：该奖项支持凝聚态物质和材料基本现象的理论研究和教育。它为未来网络基础设施的智力基础做出了贡献。PI寻求更好地理解半导体纳米结构中的相干光磁性。利用超快激光脉冲控制介质的磁化可能是提供快速存储和信息处理的有效途径。在许多磁光器件中，磁化的控制是通过吸收光或光掺杂产生的热效应来实现的。在这个项目中，PI将研究更快的非热和非耗散控制方法的理论，在这种方法中，光不会被介质吸收。鉴于纳米光学技术的最新进展，这种相干光学控制可以在纳米尺度上实现。PI将研究体、量子点和微腔中的相干光磁效应。他计划考虑基于mn掺杂半导体的纳米系统，目前正在研究其铁磁性。光可以诱导这些材料的磁相变，也可以控制临界温度和磁化方向。该项目旨在确定材料、结构和控制参数，以实现这种相干控制的最佳实现，并解决强和非平衡光物质耦合下铁磁性和相变性质的基本问题。该项目将涉及与欧盟和美国的理论家和实验家的合作。在OISE欧洲和欧亚项目的共同资助下，PI旨在与希腊的一位理论家开展合作，并为学生提供国际研究经验。研究生和本科生将参与该项目，并将接受量子光学、固体物理和统计力学方面的培训。这项研究涉及开发一套计算工具，用于计算磁性半导体的非线性光学特性，该工具将被公开。学生参与这些工具的开发将使他们能够扩展设计数字代码以解决复杂问题的技能。非技术总结：该奖项支持凝聚态物质和材料基本现象的理论研究和教育。它为未来网络基础设施的智力基础做出了贡献。PI将研究激光如何操纵材料中的量子力学状态，以及由此产生的新现象。特别令人感兴趣的是光可以操纵半导体和纳米结构中杂质的磁性状态的机制，以及可能出现的新现象。PI旨在解决关于铁磁性和相变的本质的基本问题，这是光与材料强相互作用的结果。光控制为材料科学提供了一种有趣的主动方法：这种研究的目标超出了对材料一般光学特性的研究，而直接关注于基本的凝聚态物质和量子现象，这些现象可能导致在存储器、信息处理器或网络组件中具有功能作用的光学器件的设计。这个项目可能会影响信息技术，为一些现象奠定智力基础，这些现象可能会导致基于光的新的、非耗散的、可逆的计算和数据存储方法。这些相干控制方案将为量子计算实现以及当前技术应用（如磁光记录或可调谐磁开关和放大器）提供新的思路。该项目将涉及与欧盟和美国的理论家和实验家的合作。在OISE欧洲和欧亚项目的共同资助下，PI旨在与希腊的一位理论家开展合作，并为学生提供国际研究经验。研究生和本科生将参与该项目，并将接受量子光学、固体物理和统计力学方面的培训。这项研究涉及开发一套计算工具，用于计算磁性半导体的非线性光学特性，该工具将被公开。学生参与这些工具的开发将使他们能够扩展设计数字代码以解决复杂问题的技能。