CAREER: Nonlocal Metasurfaces with All-Angle Control of Light

职业：具有全角度光控制的非局部超表面

• 批准号: 2146021
• 负责人: Chia Wei Hsu
• 金额: $ 50万
• 依托单位: University of Southern California
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2022
• 资助国家: 美国
• 起止时间: 2022-04-01 至 2027-03-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2146021&HistoricalAwards=false
• 关键词: CAREER; Nonlocal; Metasurfaces; Angle; Control

Angle-resolved modulation of light is at the heart of technologies such as cameras, microscopes, LiDAR, Li-Fi, and augmented-reality devices. Miniaturization of these devices are important for mobile, wearable, medical (e.g., endoscope), and automobile applications. Nanostructures designed to tailor the flow of light can substantially bring down the size, weight, and cost of such devices, but a paradigm shift is necessary to come up with designs that impart the appropriate modulation for not just one but all of the incident angles of interest. This research program will build the analytical and numerical tools for designing photonic devices with all-angle control of light, as well as exploring new designs that can enable compact cameras with large field of view and high-speed spatial light modulators. The computational tools developed will be made open source. Knowledge created from this research program will be incorporated into a new graduate course on applied physics at USC. These activities are further integrated with teaching and outreach activities including high school and undergraduate students in the research program, creating STEM projects for high school students, and introducing interactive optics demos to K-12 classrooms.Optical metasurfaces provide a versatile platform for spatially-resolved modulation of the phase, amplitude, and polarization of light while being amendable to large-scale fabrication. However, the widely adopted unit-cell-based locally periodic approximation is inaccurate and suboptimal for large-angle operations, and local phase-shift profiles cannot describe angle-multiplexed responses which are fundamentally nonlocal. While designs based on full-wave simulations can in principle overcome these limitations, they are extremely time consuming given the large sizes of metasurfaces and the numerous input and output states involved. This research program will develop new numerical methods that are orders-of-magnitude more efficient in computing the transmission matrices of large-area metasurfaces, introduce new perfectly matched layers that can significantly reduce the computation domain of metasurface simulations, establish fundamental thickness bounds for nonlocal metasurfaces with a large field of view, and design and realize new classes of nonlocal metasurfaces that are enabled by the preceding tools including compact wide-field-of-view imaging systems that reach the fundamental bounds and high-speed metasurface spatial light modulators. Beyond metasurfaces, these studies will also improve the fundamental understanding of multi-mode optical systems and create numerical tools for the broader scientific community.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.

光的角度分辨调制是相机、显微镜、LiDAR、Li-Fi和增强现实设备等技术的核心。这些设备的小型化对于移动的、可穿戴的、医疗（例如，内窥镜）和汽车应用。设计用于定制光的流动的纳米结构可以大大降低这种设备的尺寸，重量和成本，但是必须进行范式转变，以提出不仅对一个而是所有感兴趣的入射角进行适当调制的设计。该研究计划将建立分析和数值工具，用于设计具有全角度光控制的光子器件，并探索新的设计，使紧凑型相机具有大视场和高速空间光调制器。开发的计算工具将开放源码。从这个研究项目中创造的知识将被纳入南加州大学应用物理学的新研究生课程。这些活动进一步与教学和推广活动相结合，包括高中和本科生的研究计划，为高中生创建STEM项目，并将交互式光学演示引入K-12教室。光学超颖表面提供了一个多功能平台，用于光的相位，振幅和偏振的空间分辨调制，同时可用于大规模制造。然而，广泛采用的基于单元格的局部周期近似是不准确的，次优的大角度操作，和本地相移配置文件不能描述角度复用的响应，这是根本上非本地的。虽然基于全波模拟的设计原则上可以克服这些限制，但由于超表面尺寸大，涉及众多输入和输出状态，因此非常耗时。该研究计划将开发新的数值方法，这些方法在计算大面积超颖表面的传输矩阵时效率更高，引入新的完全匹配层，可以显着减少超颖表面模拟的计算域，为具有大视场的非局部超颖表面建立基本厚度界限，并设计和实现新的类别的非局部超颖表面，这些超颖表面由前述工具实现，包括达到基本边界的紧凑宽视场成像系统和高速超颖表面空间光调制器。除了超颖表面，这些研究还将提高对多模光学系统的基本理解，并为更广泛的科学界创造数值工具。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。

项目成果

Transmission Efficiency Limit for Nonlocal Metalenses

• DOI: 10.1002/lpor.202300201
• 发表时间: 2023-03
• 期刊: 2023 Conference on Lasers and Electro-Optics (CLEO)
• 作者: Shiyu Li;C. Hsu

Fast Multi-source Electromagnetic Simulations using Augmented Partial Factorization

使用增强型部分分解进行快速多源电磁仿真

• DOI: 10.23919/aces57841.2023.10114786
• 发表时间: 2023
• 期刊: IEEE
• 作者: Lin, Ho-Chun;Wang, Zeyu;Hsu, Chia Wei
• 通讯作者: Hsu, Chia Wei

Fast Multichannel Inverse Design through Augmented Partial Factorization

• DOI: 10.1021/acsphotonics.3c00911
• 发表时间: 2023-05
• 期刊: ACS Photonics
• 影响因子: 7
• 作者: Shiyu Li;Ho-Chun Lin;Chia Wei Hsu

Ab initio Theory for Exceptional-Point Lasers and Periodic-Inversion Lasers

异常点激光器和周期反转激光器的从头算理论

• DOI: 10.1364/cleo_si.2023.sf2n.8
• 发表时间: 2023
• 期刊: Optica Publishing Group
• 作者: Gao, Xingwei;He, Hao;Sobolewski, Scott;Hsu, Chia Wei
• 通讯作者: Hsu, Chia Wei

Coherent backscattering of entangled photon pairs

• DOI: 10.1038/s41567-022-01895-3
• 发表时间: 2022-03
• 期刊: Nature Physics
• 影响因子: 19.6
• 作者: Mamoon Safadi;Ohad Lib;Ho-Chun Lin;C. Hsu;A. Goetschy;Y. Bromberg