CAREER: Multi-chrome metasurfaces for dynamic structural color and naked eye diagnostics

职业：用于动态结构颜色和肉眼诊断的多铬超表面

• 批准号: 2047015
• 负责人: Judson Ryckman
• 金额: $ 50万
• 依托单位: Clemson University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2021
• 资助国家: 美国
• 起止时间: 2021-04-01 至 2026-03-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2047015&HistoricalAwards=false
• 关键词: CAREER; Multi; chrome; metasurfaces; dynamic

High sensitivity, fast, and accurate sensors and medical diagnostics offer positive impacts on societal well-being, national health, and aid decision making with economic consequences. However, modern scientific instrumentation and sensing technologies are often bulky, expensive, slow, and/or cumbersome to operate; and may be unavailable in disadvantaged, remote, or under-developed communities where access to laboratory grade diagnostics is sparse. Colorimetric sensors on the other hand offer a promising solution to these problems, as they can be analyzed with high resolution by digital cameras or the naked eye. However, the performance of colorimetric sensors is so far typically inferior to the bulky/expensive alternatives as it can be difficult to convert small sensor variations into a large color response. This research introduces and investigates a means to address and overcome this problem through optimization of the sensor design, coordinated with the design of the light source. This research opens the door to new types of high-performance colorimetric sensors, which may be competitive with and/or offer greater functionality than the bulky/expensive alternatives.Structural coloration faces fundamental limits which presently prevent the realization of strong dynamic color responses arising from small variations in spectral properties. As such, dynamic coloration and colorimetric sensing devices currently rely heavily on niche physical/chemical effects which must amplify spectral changes to yield their colorimetric response. Colorimetric sensors built on such approaches are not generalizable and ultimately fail to rival the performance of laboratory grade benchtop equipment which is often bulky, slow, and costly/complex to operate. The proposed research presents a transformative and general technique for color transduction and sensing which can overcome these challenges. The ultimate goal of this research is to break the present performance limits of dynamic structural color devices and to investigate a new class of structural color based diagnostics, readable by the naked eye, which can rival or even exceed the performance of benchtop alternatives. Objectives of this project include: (1) Establish the theoretical framework for our high-level approach, ‘hyperchromatic structural color’ (HSC), while mapping out and investigating the limits of dynamic color transduction and how to maximize perceived color variations in response to targeted stimuli; (2) Study the design of metasurfaces optimized for multi-chrome laser illuminants and tailored colorimetric trajectories; and fabricate, characterize, and analyze their performance while addressing integration and nanomanufacturing challenges; (3) Experimentally characterize the colorimetric sensing performance of the newly developed multi-chrome metasurfaces and advance the field of naked eye diagnostics; and (4) Implement an educational plan aimed at addressing an observed educational gap in high-school and undergraduate level optics and photonics in an effort to: (a) increase STEM exposure to local high-schoolers, (b) promote both STEM and graduate level education opportunities to underrepresented groups and minorities, and (c) bridge the gap between undergraduate education and industrial opportunities in optics and opto-electronic industries. The investigation of dynamic structural color using multi-chrome laser illuminants is compelling because it fundamentally offers access to the highest colorimetric sensitivities, and hence no alternative approach (i.e. broadband or monochromatic illumination) can principally produce stronger color variations in response to a given spectral perturbation. Our focus on studying multi-chrome metasurfaces and the integration of responsive nanomaterials will advance our understanding of: multi-resonant and moiré photonic systems, the design and optimization of moderate to low index metasurfaces and biosensors, how to nano-manufacture scalably chip-scale optics derived from unconventional media, and how to tailor spectral properties from arrays and pixelated structures.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.

高灵敏度，快速和准确的传感器和医学诊断对社会福祉，国家健康和援助决策产生积极影响，并带来经济后果。但是，现代的科学仪器和敏感技术通常是笨重，昂贵，缓慢和/或繁琐的操作。并且在灾难，遥远或欠发达的社区中可能无法获得实验室诊断稀少的社区。另一方面，比色传感器为这些问题提供了有希望的解决方案，因为它们可以通过数码相机或肉眼进行高分辨率进行分析。但是，比色传感器的性能通常不如笨重/昂贵的替代方案，因为很难将小型传感器变化转化为较大的颜色响应。这项研究介绍并研究了一种通过优化传感器设计来解决和克服此问题的手段，并与光源的设计协调。这项研究为新型的高性能比色传感器打开了大门，与笨重/昂贵的替代方案相比，它们可能具有竞争力和/或提供更大的功能。结构性着色面对基本的限制，目前可以防止在光谱中较小的变体中实现强大的动态色彩响应。因此，动态着色和比色传感器当前很大程度上依赖于利基的物理/化学效应，这些效应必须放大光谱变化以产生比色响应。在这种方法上构建的比色法传感器是不可推断的，最终无法冒险实验室级台式设备的性能，而实验室级台式设备通常是笨重，缓慢且昂贵/复杂的。拟议的研究为颜色翻译和灵敏度提供了一种变革性和一般的技术，可以克服这些挑战。这项研究的最终目的是打破动态结构颜色设备的当前性能限制，并研究新的基于结构色的诊断，可通过肉眼可读，这可以丝带或超过台式替代方案的性能。该项目的目标包括：（1）为我们的高级方法“高颜色结构色”（HSC）建立理论框架，同时绘制并研究动态色彩翻译的限制以及如何最大程度地提高感知的色彩变化，以响应目标刺激； （2）研究针对多铬激光照明剂和量身定制的比色法轨迹优化的元整面的设计；并在解决集成和纳米制造挑战的同时制造，特征和分析其性能； （3）实验表征了新开发的多晶粒元面的比色传感器性能，并推进了肉眼诊断的领域； （4）实施一项教育计划，旨在解决高中和本科级别的光学和光子学中观察到的教育差距，以努力：（a）增加对本地高中生的STEM暴露，（b）促进STEM和研究生水平的教育机会，以使人数不足的群体和少数群体和（c）在跨越工业的教育之间进行差异 - 跨越了工业界的差异 - 跨越了工业界的差异。使用多铬激光照明剂的动态结构颜色的投资是令人信服的，因为它从根本上提供了最高的比色灵敏度的访问权限，因此没有其他方法（即宽带或单色照明）主要可以产生强大的色彩变化，以响应给定的光谱扰动。 Our focus on studying multi-chrome metasurfaces and the integration of responsive nanomaterials will advance our understanding of: multi-resonant and moiré photonic systems, the design and optimization of moderate to low index Metasurfaces and biosensors, how to nano-manufacture scalably chip-scale optics derived from unconventional media, and how to tailor spectral properties from arrays and pixelated结构。该奖项反映了NSF的法定使命，并通过使用基金会的知识分子优点和更广泛的影响标准来评估，被认为是宝贵的支持。

项目成果

Fabrication of Waveguides and Gradient Index Flat Optics by Nanoimprinting Refractive Index

通过纳米压印折射率制造波导和梯度折射率平面光学器件

• DOI: 10.1364/cleo_si.2022.sth4p.6
• 发表时间: 2022
• 期刊: Technical Digest Series
• 作者: Hardison, Anna L.;Talukdar, Tahmid H.;Kravchenko, Ivan I.;Ryckman, Judson D.
• 通讯作者: Ryckman, Judson D.

Digital and Gradient Refractive Index Planar Optics by Nanoimprinting Mesoporous Silicon (Advanced Optical Materials 24/2022)

通过纳米压印介孔硅实现数字梯度折射率平面光学（先进光学材料 24/2022）

• DOI: 10.1002/adom.202270095
• 发表时间: 2022
• 期刊: Advanced Optical Materials
• 影响因子: 9
• 作者: Hardison, Anna L.;Talukdar, Tahmid H.;Kravchenko, Ivan I.;Ryckman, Judson D.
• 通讯作者: Ryckman, Judson D.

Effective medium metasurfaces using nanoimprinting of the refractive index: design, performance, and predictive tolerance analysis

使用折射率纳米压印的有效介质超表面：设计、性能和预测公差分析

• DOI: 10.1364/ome.515617
• 发表时间: 2024
• 期刊: Optical Materials Express
• 影响因子: 2.8
• 作者: Panipinto, Matthew;Ryckman, Judson D.
• 通讯作者: Ryckman, Judson D.