Cutting-edge elliptically and circularly polarized terahertz technology

尖端椭圆和圆偏振太赫兹技术

• 批准号: RTI-2020-00748
• 负责人: Ozaki, Tsuneyuki
• 金额: $ 10.34万
• 依托单位: Institut national de la recherche scientifique
• 依托单位国家: 加拿大
• 项目类别: Research Tools and Instruments
• 财政年份: 2019
• 资助国家: 加拿大
• 起止时间: 2019-01-01 至 2020-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=693560
• 关键词: Cutting; edge; elliptically; circularly; polarized

The terahertz (THz) portion of the electromagnetic spectrum, lying above the frequencies of electronics (>0.1 THz) and below those of photonics (< 30 THz), represents the last frontier of the commercial applications of light. A multitude of applications is possible with these THz pulses, many of which rely on the ability of THz radiation to pass through non-conducting and non-polar materials such as clothing, certain foods and common packing materials. More recently, there has been a significant surge in studies on the generation and application of intense THz pulses, which in turn is opening new opportunities for innovations and scientific discoveries. However, all nonlinear THz experiments up to now have used linearly polarized intense THz pulses.******The research program to be supported through this RTI proposal aims to accelerate the study of terahertz (THz) science and technology that uses elliptically and circularly polarized (ECP) THz pulses. It will allow the applicant and co-applicants to establish, maintain and strengthen their leadership in the study of nonlinear ECP THz effects. We aim to generate ECP THz pulses with unprecedented peak fields and enabling nonlinear THz measurements with a high signal-to-noise ratio (SNR). This, in turn, will lead to a more comprehensive understanding of a phenomenon recently discovered by T. Ozaki's group. The research program will also study new techniques that will allow subcycle control of the polarization state of THz pulses, thereby introducing a new parameter for linear and nonlinear THz spectroscopy. We will also study the unique THz polarization detector developed by T. Ozaki's group for use in improving the sorting of black plastics, thus having significant socio-economic benefits to Canada. To allow these various projects, we are requesting the next equipment: (1) A high-repetition-rate, ultra-high-voltage power supply, to increase the peak THz field of our intense THz source. (2) A THz camera for aligning and optimizing our intense THz source. (3) Custom THz toroidal mirrors to correct for astigmatism and to tightly focus the intense THz beam to achieve unprecedented peak THz fields. **

电磁光谱的Terahertz（THz）部分位于电子（> 0.1 THz）的频率上方，而光子学（<30 THz）（<30 THz）代表了光的商业应用的最后边界。这些THZ脉冲可以进行多种应用，其中许多依赖于THZ辐射通过非导电和非极性材料的能力，例如服装，某些食物和常见的包装材料。最近，关于激烈的THZ脉冲的产生和应用的研究激增，这又为创新和科学发现打开了新的机会。但是，到目前为止，所有非线性THZ实验都使用了线性两极化的强烈THZ脉冲。******将通过此RTI提案来支持的研究计划旨在加快Terahertz（THZ）科学和技术的研究，该研究使用椭圆形，和椭圆形和技术使用循环极化（ECP）THZ脉冲。它将允许申请人和共同申请者在研究非线性ECP THZ效应中建立，维持和加强其领导能力。我们旨在生成具有前所未有的峰场的ECP THZ脉冲，并以高信噪比（SNR）实现非线性THZ测量。反过来，这将导致对T. Ozaki小组最近发现的现象有更全面的理解。该研究计划还将研究新技术，以允许对THZ脉冲的极化状态进行亚周的控制，从而引入线性和非线性THZ光谱的新参数。我们还将研究由T. Ozaki小组开发的独特的THZ极化检测器用于改善黑色塑料的分类，从而对加拿大具有重大的社会经济益处。为了允许这些各种项目，我们要求下一个设备：（1）高更重复速率，超高电压供应，以增加我们强烈的THZ源的峰值THZ场。 （2）用于对齐和优化我们强烈的THZ源的THZ摄像头。 （3）自定义的Thz环形镜子以校正散光，并紧紧聚焦强烈的THZ梁以实现前所未有的峰值THZ场。 **