Abstract
In this work, we experimentally demonstrate enhanced absorption resonance enabled by the deconstructive interference of the reflected light in a sandwiched nanostructures composing of the ultrathin silver layer, transparent SiO2 cavity, and the opaque metallic substrate (e.g., 300-nm Ag). Such cavity-enhanced absorption is tunable via modulating the thickness of the absorptive ultrathin silver layer or the embedded transparent SiO2 cavity, giving rise to tunable structural coloration. Through five deposition processes, a 32-channel colorful sample is successfully fabricated. We believe the concepts and results make it evident that such ultrathin absorptive film offers us unprecedented opportunities on developing various photonic applications such as labeling, visual arts, and optical filters.
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Acknowledgements
The research was supported by the Natural Science Foundation of China (Nos. U1531109 and 61376010) and Natural Science Foundation of Shanghai under the Grant No. 17142200100. The research of Y. Zhou was supported by Natural Science Foundation of Shanghai under the Grant No.15590502800 and the funding of Shanghai Pujiang Program under the Grant No.15PJ1406600.
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Zhang, Y., Duan, J., Wu, M. et al. Integrated structural color array enabled by ultrathin silver film via cavity-enhanced absorption. Opt Quant Electron 50, 161 (2018). https://doi.org/10.1007/s11082-018-1427-y
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DOI: https://doi.org/10.1007/s11082-018-1427-y