Super-resolution focusing of terahertz plasmonic surface waves

太赫兹等离子体表面波的超分辨率聚焦

• 批准号: 2114103
• 负责人: Weili Zhang
• 金额: $ 33.83万
• 依托单位: Oklahoma State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2021
• 资助国家: 美国
• 起止时间: 2021-09-01 至 2025-08-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2114103&HistoricalAwards=false
• 关键词: Super; resolution; focusing; terahertz; plasmonic

Terahertz waves remain one of the most underdeveloped branches of the electromagnetic spectrum. Numerous properties of terahertz radiation promise essential applications in remote sensing, imag-ing, spectroscopy, and healthcare. This project aims to innovate control and focusing of plasmonic terahertz surface waves propagating through time-domain near-field platforms. The investigator and team are addressing technical issues that can significantly increase the intensity of plasmonic terahertz surface waves. The innovations obtained from this research represent a technological breakthrough which meets the needs of applications in fundamental scientific research and terahertz commercialization. This project investigates plasmonic surface wave focusing in the terahertz regime and develops advanced plasmonic meta-devices. Specifically, this research is delivering the following innovations: (1) Demonstrating terahertz plasmonic surface wave focusing with flexible control of focusing location and intensity, as well as features such as single-focus and dual-focus.(2) Demonstrating super-resolution focusing of plasmonic surface waves in the terahertz regime with an ultimate goal of significantly enhancing the peak intensity of plasmonic surface waves to-ward nonlinear terahertz optics and nonlinear plasmonics. (3) Developing novel plasmonic meta-devices with versatile functionalities, enabling a powerful tool to manipulate the launching and focusing of terahertz surface waves at will. The fabrication procedure, fast prototyping, and experimental validation process in this project offer proof-of-concept prototypes of plasmonic meta-devices.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

太赫兹波仍然是电磁波谱中最不发达的分支之一。太赫兹辐射的众多特性有望在遥感、成像、光谱学和医疗保健领域发挥重要作用。该项目旨在创新通过时域近场平台传播的等离子体太赫兹表面波的控制和聚焦。研究人员和团队正在解决可以显着增加等离子体太赫兹表面波强度的技术问题。这项研究获得的创新代表了一项技术突破，满足了基础科学研究和太赫兹商业化应用的需求。该项目研究太赫兹区域的等离子体表面波聚焦并开发先进的等离子体元设备。具体来说，该研究实现了以下创新：（1）演示了太赫兹等离子体表面波聚焦，可灵活控制聚焦位置和强度，以及单焦点和双焦点等特性。（2）演示了太赫兹区域等离子体表面波的超分辨率聚焦，最终目标是显着增强等离子体表面波的峰值强度以实现非线性 太赫兹光学和非线性等离子体激元。 （3）开发具有多功能的新型等离子体元器件，成为随意操纵太赫兹表面波发射和聚焦的强大工具。该项目中的制造程序、快速原型设计和实验验证过程提供了等离子体元设备的概念验证原型。该奖项反映了 NSF 的法定使命，并通过使用基金会的智力价值和更广泛的影响审查标准进行评估，被认为值得支持。

项目成果

Geometric Phase Control of Surface Plasmons by Dipole Sources

• DOI: 10.1002/lpor.202200948
• 发表时间: 2023-04-11
• 期刊: LASER & PHOTONICS REVIEWS
• 影响因子: 11
• 作者: Jiang, Xiaohan;Xu, Quan;Zhang, Weili
• 通讯作者: Zhang, Weili