Active Plasmonics with Strong THz Fields

具有强太赫兹场的主动等离子体

• 批准号: 432266622
• 负责人: Professor Dr.-Ing. Franz Xaver Kärtner
• 金额: --
• 依托单位: Arbeitsgruppe Nichtlineare Optik und Quantenelektronik von Halbleitern
• 依托单位国家: 德国
• 项目类别: Research Grants
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/432266622?language=en
• 关键词: Active; Plasmonics; Strong; THz; Fields

Plasmonics treats the interaction of visible light with conduction band electrons in nanostructures of noble metal nanostructures.The resulting strongly localized electric field in the vicinity of metal nanoparticles has led to applications in fields ranging from high speed telecommunications to photovoltaics and biological sensing.Especially telecommunication and photonic applications rely on on a control and modulation of the plasmon properties, "active plasmonics".In principle, the plasmon properties depend on the properties of the conduction band electrons constituting the plasmon oscillation. Changing them changes the plasmon. Examples for approaches realizing active plasmonics try to, for exanple, modify the electron density by electrochemical doping. Still, the observed effects are not strong and, more importantly, the modulations are too slow for high-speed applications.We propose to use strong electric fields to modify the charge density within a nanoparticle.In our project, we aim at using strong electric fields of picosecond duration from THz pulses to perturb the electron cloud and to modify the plasmon properties. First experiments were promising and showed strong effects. We plan a systematic study to verify the effect and we want to develop a theory that allows texplaining and understanding the THz plasmon tuning.

Plasmonics treats the interaction of visible light with conduction band electrons in nanostructures of noble metal nanostructures.The resulting strongly localized electric field in the vicinity of metal nanoparticles has led to applications in fields ranging from high speed telecommunications to photovoltaics and biological sensing.Especially telecommunication and photonic applications rely on on a control and modulation of the plasmon properties, "active原则上，等离子的性能取决于构成等离子振荡的传导带电子的性质。改变它们会改变等离子体。实现活性等离子体学的方法的示例尝试通过电化学掺杂来改变电子密度。尽管如此，观察到的效果并不强，更重要的是，对于高速应用而言，调制效果太慢了。我们建议使用强电场来修改纳米粒子内的电荷密度。在我们的项目中，我们旨在利用thz脉冲的强烈电场的强场持续时间，以使电子云和质量质量变化。第一个实验是有希望的，并且显示出强烈的影响。我们计划进行系统研究以验证效果，并希望开发一种理论，允许将TEXPLE和理解THZ等离子体调整。