McCrindle Iain J H, Grant James, Drysdale Timothy D, Cumming David R S
School of Engineering, University of Glasgow, Glasgow, G12 8LT, UK.
Opt Express. 2013 Aug 12;21(16):19142-52. doi: 10.1364/OE.21.019142.
Multi-spectral imaging systems typically require the cumbersome integration of disparate filtering materials in order to work simultaneously in multiple spectral regions. We show for the first time how a single nano-patterned metal film can be used to filter multi-spectral content from the visible, near infrared and terahertz bands by hybridizing plasmonics and metamaterials. Plasmonic structures are well-suited to the visible band owing to the resonant dielectric properties of metals, whereas metamaterials are preferable at terahertz frequencies where metal conductivity is high. We present the simulated and experimental characteristics of our new hybrid synthetic multi-spectral material filters and demonstrate the independence of the metamaterial and plasmonic responses with respect to each other.
多光谱成像系统通常需要集成不同的滤波材料，这一过程较为繁琐，以便能在多个光谱区域同时工作。我们首次展示了如何通过将等离子体激元学与超材料相结合，利用单个纳米图案化金属膜从可见光、近红外和太赫兹波段中过滤多光谱内容。由于金属具有共振介电特性，等离子体激元结构非常适合可见光波段，而在金属电导率较高的太赫兹频率下，超材料更为适用。我们展示了新型混合合成多光谱材料滤波器的模拟和实验特性，并证明了超材料和等离子体激元响应相互独立。
