Raman, Brillouin, Inrared and Modulation Spectroscopy of Collective and Localized Excitations in Tetrahedrally Coordinated Semiconductors & Their Heterostructures

四面体配位半导体中集体和局域激发的拉曼光谱、布里渊光谱、红外光谱和调制光谱

• 批准号: 0705793
• 负责人: Anant Ramdas
• 金额: --
• 依托单位: Purdue University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-09-01 至 2013-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0705793&HistoricalAwards=false
• 关键词: Raman; Brillouin; Inrared; Modulation; Spectroscopy

Non-Technical AbstractThe proposed research exploits a range of optical techniques in order to discover the behavior and properties of new semiconductors constantly being produced for advanced applications. High temperature/high power devices based on wide gap semiconductors such as diamond and having diamond like structures (SiC,ZnO,GaN, etc); a class of semiconducting materials known as "spintronic compounds" with magnetic constituents; and materials obtained with deliberate addition of specific impurities to semiconductors will be studied. These illustrative examples underscore the excitement and the intellectual appeal of semiconductors and their ever increasing applications in consumer, industrial, space, and defense electronics. The graduate students and postdoctoral research associates with the program will be well prepared for research careers by this exposure to the cutting edge work. With the expertise thus acquired, they will become future creative members of the academia as well as national, industrial, and defense science laboratories in the coming decades.Technical AbstractThe project explores collective and localized excitations in tetrahedrally coordinated semiconductors and their hetero-nanostructures exploiting a variety of spectroscopic and optical techniques (Raman, Brillouin, Infrared and Modulation Spectroscopy; magneto-optics - Faraday, Voigt, and Zeeman effect). Signatures unique to the II-VI diluted magnetic semiconductors, isotopically controlled II-VI (ZnO and CdSe), III-V (GaN), IV-IV (SiC polytypes) and elemental (diamond) will be explored and delineated in the context of electronic, magnetic, and vibrational excitations and their behavior under external perturbations. Novel effects resulting from dimensional constraints in hetero-and nano-structures will be investigated. Graduate students and undergraduate students (selected for "research experience") will acquire skills in the state-of-the-art spectroscopy applied to forefront areas in contemporary semiconductor physics, and, in turn, become part of the scientific/technical condensed matter community and have a positively impact on materials science.

非技术摘要提出的研究利用了一系列光学技术，以发现不断为高级应用产生的新半导体的行为和特性。高温/高功率设备基于宽间隙半导体（例如钻石）和具有钻石等结构（SIC，ZnO，GAN等）的高温设备；一类半导体材料，称为磁成分的“旋转化合物”；将研究通过故意向半导体添加特定杂质获得的材料。这些说明性的例子强调了半导体的兴奋和智力吸引力及其在消费者，工业，空间和国防电子产品中的不断增加。与该计划的研究生和博士后研究合作伙伴将通过这种接触尖端工作为研究职业做好充分的准备。 With the expertise thus acquired, they will become future creative members of the academia as well as national, industrial, and defense science laboratories in the coming decades.Technical AbstractThe project explores collective and localized excitations in tetrahedrally coordinated semiconductors and their hetero-nanostructures exploiting a variety of spectroscopic and optical techniques (Raman, Brillouin, Infrared and Modulation Spectroscopy; Magneto -Optics -Faraday，Voigt和Zeeman效果）。 II-VI稀释的磁性半导体，同位素控制的II-VI（ZnO和CDSE），III-V（GAN），IV-IV（SIC Polytypes）和元素（Diamond）以及在电子，磁性兴奋和纤维振动下进行外部行为，将探索和描述。 将研究由杂项和纳米结构中的尺寸约束产生的新作用。 研究生和本科生（为“研究经验”选择）将获取在当代半导体物理学的最前沿领域的最新光谱方面的技能，进而成为科学/技术凝聚的物质社区的一部分，并对材料科学产生积极影响。