Collaborative Research: 2D ferroelectric nonlinear metasurface holograms

合作研究：二维铁电非线性超表面全息图

• 批准号: 2226875
• 负责人: Jie Gao
• 金额: $ 22.21万
• 依托单位: SUNY at Stony Brook
• 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: 2022-09-01 至 2025-08-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2226875&HistoricalAwards=false
• 关键词: Collaborative; Research; 2D; ferroelectric; nonlinear

Holography has become a promising approach for image recording and reconstruction with a wide range of applications in many fields such as optical communication, data storage, information security, medical diagnosis, and color displays. Metasurfaces have been widely used to realize ultracompact and efficient nonlinear optical holograms for the generation of complex optical beams and holographic images. However, the existing nonlinear metasurface holograms suffer from several issues such as low conversion efficiency, high absorption loss, and large thickness, which greatly hinder their practical uses in integrated optical devices. In this project, a new type of switchable nonlinear metasurface holograms based on 2D materials will be demonstrated with high conversion efficiency but only nanometer thickness. This research will benefit many promising photonic applications in optical data memory and logic, optical computing, quantum information processing, and flat optoelectronic devices. This project also includes educational activities for training and mentoring graduate and undergraduate students, recruiting underrepresented and female students, and participating outreach activities for high school students.Metasurfaces have been utilized to realize nonlinear holograms for coherent generation of optical beams and holographic images at new frequencies. However, the existing nonlinear plasmonic metasurface holograms suffer from low conversion efficiency and high absorption loss, while the dielectric metasurfaces have the thickness limited to several hundreds of nanometers. The goal of this project is to explore a new type of atomically thin 2D ferroelectric nonlinear metasurface holograms with both amplitude and phase modulations for achieving reconfigurable functionalities in optical beam generation and holographic image reconstruction with high conversion efficiency. In this project, the design, sample fabrication, and experimental characterization of 2D ferroelectric holograms will be conducted to demonstrate the production of nonlinear optical beams and the reconstruction of complex holographic images. Several unique types of 2D ferroelectric materials are utilized to construct the metasurface holograms with distinguished switching functionalities in nonlinear responses. This project will reveal the underlying physics of switchable light-matter interactions at the atomic scale between structured light and 2D materials.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.

全息技术在光通信、数据存储、信息安全、医疗诊断、彩色显示等领域有着广泛的应用前景。超表面被广泛用于实现超紧凑、高效的非线性光学全息图，以产生复杂的光束和全息图像。然而，现有的非线性超表面全息图存在转换效率低、吸收损耗大、厚度大等问题，极大地阻碍了其在集成光学器件中的实际应用。本项目将展示一种基于二维材料的新型可切换非线性超表面全息图，其转换效率高，但厚度仅为纳米级。这项研究将有利于光子在光学数据存储和逻辑、光学计算、量子信息处理和平面光电器件等领域的许多有前途的应用。该项目还包括培训和指导研究生和本科生的教育活动，招募代表性不足的学生和女学生，以及参与高中生的外展活动。超表面已被用于实现非线性全息图，用于在新频率下相干产生光束和全息图像。然而，现有的非线性等离子体超表面全息图存在转换效率低、吸收损耗大的问题，而介质超表面的厚度限制在几百纳米。本项目的目标是探索一种具有振幅和相位调制的新型原子薄二维铁电非线性超表面全息图，以实现具有高转换效率的光束生成和全息图像重建的可重构功能。在本项目中，将进行二维铁电全息图的设计，样品制作和实验表征，以演示非线性光束的产生和复杂全息图像的重建。利用几种独特类型的二维铁电材料来构建非线性响应中具有不同开关功能的超表面全息图。该项目将揭示在结构光和二维材料之间的原子尺度上可切换的光-物质相互作用的潜在物理。该奖项反映了美国国家科学基金会的法定使命，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。