High field terahertz plasmonics

高场太赫兹等离子体激元

• 批准号: 1101171
• 负责人: Daniel Mittleman
• 金额: $ 30.68万
• 依托单位: William Marsh Rice University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2011
• 资助国家: 美国
• 起止时间: 2011-04-15 至 2014-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1101171&HistoricalAwards=false
• 关键词: field; terahertz; plasmonics

ObjectiveThe aim of this research program is to demonstrate new techniques for sensing and nonlinear spectroscopy using terahertz pulses with very high peak electric fields. Our approach is to combine our recent work on plasmon-induced field enhancements with newly developed techniques for high-energy terahertz pulse generation. Plasmonic interactions near subwavelength metal structures give rise to tiny regions of enhanced electromagnetic energy density. When these structures are excited by high-energy ultrashort pulses, the resulting field strengths will be huge, well into the regime of nonlinear optics. The combination of these two ideas, optimized for terahertz radiation, will open up a new realm of terahertz nonlinear optics.Intellectual MeritThe intellectual merit of this research program lies in the development of sensitive new techniques for time-resolved spectroscopic studies based on nonlinear interactions induced by strong terahertz fields. In addition, the ability to detect very small quantities of an analyte using terahertz nonlinear optical effects, with high temporal and spatial resolution, will reveal new dynamical processes previously obscured by limitations of sample size and inhomogeneity. Finally, this work will enable the study of nonlinear surface plasmon propagation, and will contribute to our understanding of high-field plasmon dynamics from terahertz to optical frequencies.Broader ImpactsBy generating the highest terahertz fields yet reported and studying their interaction with materials, this work will establish the possibility of exploiting higher-order nonlinear interactions. It will also demonstrate new techniques for terahertz-based sensing, which are of great technological importance. More broadly, this research will change our view of the limits of science in the THz regime by establishing a new discipline of high-field terahertz light-matter interactions.

该研究计划的客观性目的是使用具有很高峰值电场的Terahertz脉冲来证明用于传感和非线性光谱的新技术。 我们的方法是将我们最近在等离子体诱导的现场增强功能的工作与新开发的高能Terahertz脉冲产生技术相结合。 亚波长金属结构附近的等离子体相互作用产生了增强的电磁能密度的微小区域。 当这些结构被高能超致脉冲激发时，所得场强的强度将是巨大的，这将是非线性光学元件的机制。 这两个想法的结合，针对Terahertz辐射进行了优化，将为Terahertz非线性光学的新领域开放。Intellectual值得这项研究计划的智力优点在于开发敏感的新技术，用于针对时间分解的光谱研究，基于基于强的Terahertz Fields引起的非线性相互作用。 此外，具有较高时间和空间分辨率的Terahertz非线性光学效应检测非常少量的分析物的能力将揭示以前被样本量和不均匀性的限制所掩盖的新动力学过程。 最后，这项工作将能够研究非线性表面等离子体传播，并有助于我们理解从Terahertz到光学频率的高场等离子体动力学。BoaderImpactsbysby By Impactsby尚未产生Terahertz领域迄今尚未报告并研究其与材料的相互作用，这项工作将建立利用高等差异的可能性。 它还将展示用于基于Terahertz的传感的新技术，这是技术上重要的。 从更广泛的角度来看，这项研究将通过建立一门新的Terahertz轻质互动的新学科来改变我们对THZ政权中科学局限性的看法。