Chalcogenide metasurface enabled multispectral display and sensor arrays

硫族化物超表面支持多光谱显示和传感器阵列

• 批准号: RGPIN-2019-03952
• 负责人: Gholipour, Behrad
• 金额: $ 2.4万
• 依托单位: University of Alberta
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2020
• 资助国家: 加拿大
• 起止时间: 2020-01-01 至 2021-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=714530
• 关键词: Chalcogenide; metasurface; enabled; multispectral; display

The introduction of optical-fibre networks in the 1980's along with the ongoing merger of optics and electronics has led to light becoming a major information carrier and manufacturing tool in 21st century society. One cannot imagine modern life without telecommunication networks, real-time sensing and modern display technologies. Therefore, dynamic control and detection of light at the nanoscale across ultraviolet, visible and infrared frequencies (UV-Vis-IR), without doubt the most socio-economically important wavelength band, is essential to a range of industries critical to Canada's security/prosperity. This is for two main reasons; i. Critical to sensing/spectroscopy, a large number of characteristic molecular absorption fingerprints originating from the intrinsic vibrational modes of chemical bonds are observed across this spectral range. ii. Telecommunication network architectures and display technologies also operate across this spectral band and require low size, weight and power devices with engineered properties that allow high spatial and temporal control and detection of light. However, there is no single display, detector or sensor that can provide accurate, spatially resolved measurements across this entire range. Therefore, the exploration and design of a singular material/device platform for compact, power-efficient, reconfigurable and adaptive photonic applications requiring ultra-fast control and detection of light across the entire UV-Vis-IR frequency range is a grand challenge in nanophotonics today. The solution is found in the exploration of reconfigurable and photoconductive chalcogenide semiconductors (alloys of sulfur, selenium or tellurium) offering wide transmission windows that depending on chemical composition can span Vis-to-IR frequencies. They offer high refractive index, low loss properties across IR frequencies and low index/plasmonic properties across UV-Vis wavelengths making them the perfect material candidate for realising active' nanophotonic devices across this spectral band. Using these properties, the proposed research program aims to realise large area pixel arrays for electro- and all-optical spatial light modulators (displays) as well as biochemical sensors and photodetectors capable of operation across the entire UV-Vis-IR frequency range. Subwavelength nanostructuring (metasurfaces) will be deployed within each pixel to selectively enhance and tailor color, intensity, phase, polarization and beam steering properties at multiple application-dependent wavelength bands (multispectral). The multidisciplinary nature of the program will enable the training of highly qualified persons on a range of tools and techniques, by utilising the world-class nanofabrication, characterization and computing facilities at the University of Alberta. Throughout, mass-manufacturable patterning, growth and packaging techniques will be used to ensure ease of transition of the research from lab to industry.

20世纪80年代光纤网络的引入以及光学和电子学的不断融合使光成为21世纪社会的主要信息载体和制造工具。人们无法想象没有电信网络、实时传感和现代显示技术的现代生活。因此，在纳米尺度上对紫外、可见光和红外频率（UV-Vis-IR）的光进行动态控制和检测，无疑是对社会经济最重要的波长带，对于对加拿大安全/繁荣至关重要的一系列行业至关重要。这有两个主要原因；我。对于传感/光谱学至关重要，在该光谱范围内观察到源自化学键固有振动模式的大量特征分子吸收指纹。二.电信网络架构和显示技术也在该光谱带上运行，需要尺寸小、重量轻、功耗低的设备，其工程特性允许对光进行高空间和时间控制和检测。然而，没有单一的显示器、探测器或传感器可以在整个范围内提供准确的、空间分辨率的测量。因此，探索和设计单一材料/器件平台，用于需要在整个紫外-可见-红外频率范围内超快速控制和检测光的紧凑、节能、可重构和自适应光子应用，是纳米光子学领域的一项巨大挑战今天。该解决方案是在可重构和光电导硫族化物半导体（硫、硒或碲合金）的探索中找到的，该半导体提供宽广的传输窗口，根据化学成分，该窗口可以跨越可见光到红外频率。它们在整个红外频率范围内具有高折射率、低损耗特性，以及在紫外-可见光波长范围内具有低折射率/等离激元特性，使它们成为在该光谱带上实现有源纳米光子器件的完美候选材料。 利用这些特性，拟议的研究计划旨在实现用于电和全光空间光调制器（显示器）的大面积像素阵列以及能够在整个紫外-可见-红外频率范围内运行的生化传感器和光电探测器。亚波长纳米结构（超表面）将部署在每个像素内，以选择性地增强和定制多个取决于应用的波长带（多光谱）的颜色、强度、相位、偏振和光束控制特性。该项目的多学科性质将利用阿尔伯塔大学世界一流的纳米制造、表征和计算设施，对高素质人才进行一系列工具和技术的培训。整个过程中，将使用可大规模制造的图案化、生长和封装技术，以确保研究从实验室到工业的轻松过渡。