Grant James, McCrindle Iain J H, Cumming David R S
Opt Express. 2016 Feb 22;24(4):3451-63. doi: 10.1364/OE.24.003451.
Multi-spectral imaging systems typically require the cumbersome integration of disparate filtering materials and detectors in order to operate simultaneously in multiple spectral regions. Each distinct waveband must be detected at different spatial locations on a single chip or by separate chips optimised for each band. Here, we report on a single component that optically multiplexes visible, Mid Infrared (4.5 μm) and Terahertz (126 μm) radiation thereby maximising the spectral information density. We hybridise plasmonic and metamaterial structures to form a device capable of simultaneously filtering 15 visible wavelengths and absorbing Mid Infrared and Terahertz. Our synthetic multi-spectral component could be integrated with silicon complementary metal-oxide semiconductor technology where Si photodiodes are available to detect the visible radiation and micro-bolometers available to detect the Infrared/Terahertz and render an inexpensive, mass-producible camera capable of forming coaxial visible, Infrared and Terahertz images.
多光谱成像系统通常需要集成各种不同的滤波材料和探测器，过程繁琐，以便在多个光谱区域同时运行。每个不同的波段必须在单个芯片上的不同空间位置进行检测，或者由针对每个波段优化的单独芯片进行检测。在此，我们报告了一种单一组件，它能对可见光、中红外（4.5微米）和太赫兹（126微米）辐射进行光学复用，从而使光谱信息密度最大化。我们将等离子体和超材料结构进行混合，形成一种能够同时过滤15个可见波长并吸收中红外和太赫兹的器件。我们的合成多光谱组件可以与硅互补金属氧化物半导体技术集成，其中硅光电二极管可用于检测可见光辐射，微测辐射热计可用于检测红外/太赫兹，并制造出一种能够形成同轴可见光、红外和太赫兹图像的廉价、可大规模生产的相机。
