Development of tunable THz wire lasers

可调谐太赫兹线激光器的开发

• 批准号: 0968633
• 负责人: Qing Hu
• 金额: $ 35万
• 依托单位: Massachusetts Institute of Technology
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2010
• 资助国家: 美国
• 起止时间: 2010-04-01 至 2013-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0968633&HistoricalAwards=false
• 关键词: Development; tunable; THz; wire; lasers

The proposed research seeks to develop broadly tunable terahertz quantum-cascade lasers (THz QCLs) based on a novel tuning mechanism that was recently (in 2009) demonstrated by the proposing principal investigator's group. This tuning mechanism is qualitatively different from all the other methods implemented in tunable lasers, in which either the dielectric constant or the longitudinal component of the wavevector is changed to tune the frequency of an already fabricated laser device. The novel tuning mechanism takes advantage of the relatively long wavelength at THz frequencies and is achieved in the extreme limit of wire lasers, whose cross section is much smaller than the wavelength. Intellectual merit: The concept of wire lasers is new, and it was developed only recently by analyzing unexpected beam patterns of these lasers. There are many unique properties associated with this unusual device. One of them is that the laser frequency can be tuned by changing the transverse mode profile. Broader impacts: The principal investigator has been invited to give invited/plenary/keynote talks at many prestigious conferences. The work from the PI's group has also been reported in media for broad communities such as Technology Review, Laser Focus, and NPR Market Place. Through collaborations, the THz lasers developed in the PI's group have helped to enhance infrastructures at other institutions in THz-related activities by adding a crucial enabling component. The principal investigator will incorporate elements in the research project into a graduate course in solid-state physics and a undergraduate core course Signals and Systems.

拟议的研究旨在开发广泛可调谐的太赫兹量子级联激光器（THz QCL），该激光器基于一种新的调谐机制，该机制最近（2009年）由提议的首席研究员小组证明。这种调谐机制与可调谐激光器中实现的所有其他方法在性质上不同，在可调谐激光器中，改变波矢量的介电常数或纵向分量以调谐已经制造的激光器器件的频率。这种新型的调谐机制利用了太赫兹频率下相对较长的波长，并在其横截面远小于波长的线激光器的极限下实现。 智力优势：线激光器的概念是新的，它是最近通过分析这些激光器的意外光束模式而开发的。有许多独特的属性与这个不寻常的设备。其中之一是可以通过改变横模分布来调谐激光频率。更广泛的影响：主要研究者已被邀请在许多著名的会议上进行邀请/全体会议/主题演讲。PI小组的工作也被广泛的社区媒体报道，如技术评论，激光焦点和NPR市场。通过合作，PI小组开发的THz激光器通过增加一个关键的使能组件，帮助加强了其他机构在THz相关活动中的基础设施。 首席研究员将把研究项目中的元素纳入固态物理研究生课程和本科核心课程信号与系统。