GOALI: Tunable Quantum Coupling in Nanomechanical Heterostructures

GOALI：纳米机械异质结构中的可调谐量子耦合

• 批准号: 0702515
• 负责人: Joseph Talghader
• 金额: --
• 依托单位: University of Minnesota-Twin Cities
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-06-01 至 2011-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0702515&HistoricalAwards=false
• 关键词: GOALI; Tunable; Quantum; Coupling; Nanomechanical

NSF 0702515GOALI: Tunable Quantum Coupling using Nanomechanical HeterostructuresObjective:The objective of this research is to determine whether the energy levels of surface quantum wells can be tuned using nanomechanical actuation like the resonant frequency of an optical cavity can be tuned using movable mirrors. Both interband and intersubband level transitions will be investigated. The approach is to utilize micromachined cantilevers of compound semiconductor heterostructures that have collapsed across a nanometer-scale gap. Such devices are easy to fabricate and naturally collapse upon etch release. Further, the gap height gradually changes from gap to contact making light emission studies versus quantum coupling much easier.Intellectual Merit:The merits of such an approach are significant. New physics is involved, and the amount of energy state tuning that can be achieved is immense compared to current technology. Theoretical analysis shows that two surface quantum wells brought into contact could shift their first quantized levels by over 150nm, limited ultimately by band offsets at high energies and thermal broadening at low energies.Broader Impact:The impact of the research could be immense. Current semiconductor light emitters and detectors have limited tuning ranges. The concepts here could extend the tuning of interband transitions to 30% and intersubband transitions to an order of magnitude. This program will provide opportunities for undergraduate researchers as part of a Nanotechnology Network initiative for women, minorities, and students from small colleges. The program will also include research opportunities for one or more high school students through a Mentor Program in one of the local school districts of the Twin Cities area.Word Count: 248 Words (not including section titles)

NSF 0702515GOALI：使用纳米机械异质结构的可调谐量子耦合目的：本研究的目的是确定表面量子阱的能级是否可以通过纳米机械驱动来调谐，例如光学腔的谐振频率可以通过可移动的反射镜来调谐。我们将研究带间和子带间的能级跃迁。方法是利用微机械加工的化合物半导体异质结构的悬臂梁，这些悬臂梁已经跨纳米级的间隙坍塌。这种器件很容易制造，并且在腐蚀释放时自然坍塌。此外，缝隙高度从缝隙到接触逐渐变化，使得研究光发射与量子耦合更容易。智能优点：这种方法的优点是显著的。涉及到新的物理，与当前的技术相比，可以实现的能量状态调谐的量是巨大的。理论分析表明，两个接触的表面量子阱可以使它们的第一个量子化能级移动超过150 nm，最终受到高能下的能带偏移和低能下的热展宽的限制。更广泛的影响：这项研究的影响可能是巨大的。目前的半导体光发射器和探测器的调谐范围有限。这里的概念可以将带间跃迁的调谐扩展到30%，并将子带间跃迁的调谐扩展到数量级。该计划将为本科生研究人员提供机会，作为面向女性、少数民族和小型学院学生的纳米技术网络倡议的一部分。该计划还将包括一名或多名高中生通过导师计划在双子城地区的一个当地学区进行研究的机会。字数：248字(不包括章节标题)