MRI: Acquisition of a Short-pulse Ti:Sapphire Laser for Terahertz Studies of Semiconductor Heterostructures

MRI：获取短脉冲钛宝石激光器用于半导体异质结构的太赫兹研究

• 批准号: 0116323
• 负责人: James Heyman
• 金额: $ 13.36万
• 依托单位: Macalester College
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-09-01 至 2002-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0116323&HistoricalAwards=false
• 关键词: MRI; Acquisition; Short; pulse; Ti

With this award from the Major Research Instrumentation program Macalester College will be able to acquire a short Titanium-Sapphire laser for Terahertz studies of semiconductor heterostructures. The laser system will permit time-resolved spectroscopy of materials at terahertz and mid-infrared frequencies. Initial research will use the instrument to support the Principal Investigator's NSF-funded program to study spin and charge dynamics in semiconductors (NSF-RUI DMR-0074622). Projects will include ultrafast Terahertz spectroscopy of spin-dynamics in semiconductors; time-resolved measurements of magneto-plasma oscillations in semiconductors; and quantum transitions in strongly driven semiconductor quantum wells and heterostructures. The equipment will also support undergraduate research training in Photonics and Condensed Matter Physics at Macalester College.With this award from the Major Research Instrumentation program Macalester College will be able to acquire a short Titanium-Sapphire laser for Terahertz studies of semiconductor heterostructures. As the switching rates in electronic devices are pushed to ever higher frequencies, it becomes increasingly important to understand carrier transport phenomena in semiconductors on picosecond (10-12s) and femtosecond (10-15s) time-scales. Using ultrafast terahertz spectroscopy it is possible to impulsively excite a material with a femtosecond optical pulse or single-cycle electromagnetic pulse, and record the resulting motion of charge in time. This award supports equipment to enable time-resolved spectroscopy of materials at terahertz and mid-infrared frequencies. Initial research will use the instrument to support the Principal Investigator's NSF-funded program to study spin and charge dynamics in semiconductors (NSF-RUI DMR-0074622). The equipment will also support undergraduate research training in Photonics and Condensed Matter Physics at Macalester College.

通过重大研究仪器计划的奖项，麦卡莱斯特学院将能够获得短钛sapphire Laser，用于Terahertz的半导体异质结构研究。激光系统将允许在Terahertz和中红外频率的材料进行时间分辨光谱。 最初的研究将使用该工具来支持主要研究者NSF资助的计划，以研究半导体中的旋转和电荷动力学（NSF-RUI DMR-0074622）。 项目将包括半导体中自旋动力学的超快terahertz光谱；半导体中磁性振荡的时间分辨测量；和强驱动的半导体量子井和异质结构中的量子过渡。 该设备还将支持Macalester College的光子学和凝结物理学的本科研究培训。在主要的研究仪器计划中，Macalester College的这一奖项将能够获得Terahertz Smiciconconcuctor Ornostructures研究的简短钛sapphire Laser。随着电子设备中的开关速率被推到较高的频率，了解Picsecond（10-12）和二秒（10-15s）时间尺度的半导体中的载流子传输现象变得越来越重要。使用超快的Terahertz光谱法可以冲动地激发使用飞秒光脉冲或单周期电磁脉冲的材料，并记录所得的电荷运动。 该奖项支持设备，以实现Terahertz和中红外频率的材料的时间分辨光谱。最初的研究将使用该工具来支持主要研究者NSF资助的计划，以研究半导体中的旋转和电荷动力学（NSF-RUI DMR-0074622）。该设备还将支持Macalester College的光子学和凝结物理学的本科研究培训。