Flexible Nonlinear Plasmonic Metasurfaces with Multiresonant Composite Enhancement

具有多谐振复合增强功能的柔性非线性等离激元超表面

• 批准号: 2139317
• 负责人: Wei Zhou
• 金额: $ 30.01万
• 依托单位: Virginia Polytechnic Institute and State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2022
• 资助国家: 美国
• 起止时间: 2022-02-01 至 2025-01-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2139317&HistoricalAwards=false
• 关键词: Flexible; Nonlinear; Plasmonic; Metasurfaces; Multiresonant

Non-technical Description: Plasmonic metasurfaces are two-dimensional nanoantenna arrays that can control the propagation of light. They are ultrathin, easy to fabricate and feature superior nonlinear optical properties compared with bulky materials. For example, such nanomaterials can be used convert coherent light from one color to another. This process is important for emerging applications in quantum communications, computing, and sensing. This project focuses on the design, fabrication, and characterization of plasmonic metasurfaces that can concentrate light over a broad color range and efficiently convert coherent light between different colors. The PI will also develop a scalable, low-cost approach to create flexible ultrathin nanomaterials with a biocompatible microporous structure for biosensing and imaging. The project will advance STEM education through an engaging undergraduate photonics course that connects photonics and nanotechnology to real-world applications. The PI will promote educational diversity by actively participating in local K-12 STEM events and recruit underrepresented students to the research team. The scientific outcomes of this project will be disseminated to a broad audience through creative exhibits in the science festival and outreach activities for K-12 students.Technical Description: Simultaneous nanolocalized enhancement of excitation and emission transitions in nonlinear processes remains a challenge in nanophotonics research but can offer many applications in coherent light conversion, imaging, sensing, quantum optics, and spectroscopy. To address this challenge, the research team proposes to develop a new type of ultrathin nonlinear plasmonic metasurfaces, consisting of periodic metal-dielectric nanoantenna nanomaterials, to enhance nonlinear coherent light conversion processes, including second harmonic generation (SHG) and third harmonic generation (THG). The research objectives include: (1) Elucidating the structure-property relationships in engineering multiresonant optical properties of nonlinear plasmonic metasurfaces; (2) Determining SHG and THG responses from nonlinear plasmonic metasurfaces with multiresonant composite enhancement; (3) Developing a scalable, low-cost nanofabrication approach to integrating ultrathin nonlinear plasmonic metasurfaces with biocompatible flexible polymeric meshes. This research can advance fundamental knowledge in nonlinear nanophotonics by revealing the relationship between geometry-material-resonance characteristics in plasmonic metasurfaces and their nonlinear light conversion performance. This project can generate practical insights into rational design and scalable nanofabrication methods to create flexible plasmonic metasurface meshes for bio-interfaced nonlinear optical sensing and imaging applications.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.

非技术描述：等离子体超表面是可以控制光传播的二维纳米天线阵列。与大体积材料相比，它们具有体积小、易于制备和上级非线性光学性能优越等优点。例如，这种纳米材料可以用来将相干光从一种颜色转换为另一种颜色。这一过程对于量子通信、计算和传感等新兴应用非常重要。该项目的重点是设计，制造和表征等离子体元表面，可以集中在广泛的颜色范围内的光，并有效地转换不同颜色之间的相干光。PI还将开发一种可扩展的低成本方法，以创建具有生物相容性微孔结构的柔性纳米材料，用于生物传感和成像。该项目将通过一门引人入胜的本科光子学课程推进STEM教育，该课程将光子学和纳米技术与现实世界的应用联系起来。PI将通过积极参与当地K-12 STEM活动来促进教育多样性，并招募代表性不足的学生加入研究团队。该项目的科学成果将通过科学节的创意展览和K-12学生的外展活动向广大观众传播。技术描述：同时纳米定位增强非线性过程中的激发和发射跃迁仍然是纳米光子学研究的一个挑战，但可以在相干光转换，成像，传感，量子光学和光谱学中提供许多应用。为了应对这一挑战，研究小组提出开发一种新型的非线性等离子体元表面，由周期性金属-介电纳米天线纳米材料组成，以增强非线性相干光转换过程，包括二次谐波产生（SHG）和三次谐波产生（THG）。研究目标包括：（1）阐明非线性等离子体超表面的工程多共振光学性质中的结构-性质关系;（2）确定具有多共振复合增强的非线性等离子体超表面的SHG和THG响应;（3）开发可扩展的低成本纳米纤维方法，以将非线性等离子体超表面与生物相容性柔性聚合物网格集成。本研究通过揭示等离子体超表面的几何-材料-共振特性与其非线性光转换性能之间的关系，可以推进非线性纳米光子学的基础知识。该项目可以产生对合理设计和可扩展的纳米纤维方法的实际见解，以创建用于生物界面非线性光学传感和成像应用的灵活等离子体元表面网格。该奖项反映了NSF的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。