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Realization of broadband coherent perfect absorption of spoof surface plasmon polaritons
Applied Physics Letters ( IF 4 ) Pub Date : 2022-04-26 , DOI: 10.1063/5.0089065 Cong Wang 1 , Xian Shen 1 , Hongchen Chu 1 , Jie Luo 2 , Xiaoxi Zhou 2 , Bo Hou 2 , Ruwen Peng 1 , Mu Wang 1 , Yun Lai 1
Applied Physics Letters ( IF 4 ) Pub Date : 2022-04-26 , DOI: 10.1063/5.0089065 Cong Wang 1 , Xian Shen 1 , Hongchen Chu 1 , Jie Luo 2 , Xiaoxi Zhou 2 , Bo Hou 2 , Ruwen Peng 1 , Mu Wang 1 , Yun Lai 1
Affiliation
In this work, we propose and demonstrate a scheme to realize broadband coherent perfect absorption of spoof surface plasmon polaritons (SPPs) using an ultrathin conductive film vertically placed on a plasmonic metasurface that supports spoof SPPs. When the conductive film possesses an appropriate sheet resistance, two incident coherent beams of spoof SPP waves can be simultaneously absorbed over a broad spectrum. By tuning the phase difference between the two incident beams from 0 to [Formula: see text], the absorption can be gradually changed from near-100% to near-zero, as verified in full-wave simulations and microwave experiments. Our work extends the theory of coherent perfect absorption from propagating waves to spoof SPPs with a significant advantage of broad working bandwidth.
中文翻译:
欺骗性表面等离子体激元宽带相干完美吸收的实现
在这项工作中,我们提出并展示了一种方案,该方案使用垂直放置在支持欺骗性 SPP 的等离子体超表面上的超薄导电膜实现欺骗性表面等离子体激元 (SPP) 的宽带相干完美吸收。当导电薄膜具有适当的薄层电阻时,可以在广谱范围内同时吸收两束入射的相干欺骗 SPP 波束。通过将两个入射光束之间的相位差从 0 调整到 [公式:见文本],吸收可以逐渐从接近 100% 变为接近零,这在全波模拟和微波实验中得到了验证。我们的工作将相干完美吸收理论从传播波扩展到具有宽工作带宽的显着优势的欺骗 SPP。
更新日期:2022-04-26
中文翻译:
欺骗性表面等离子体激元宽带相干完美吸收的实现
在这项工作中,我们提出并展示了一种方案,该方案使用垂直放置在支持欺骗性 SPP 的等离子体超表面上的超薄导电膜实现欺骗性表面等离子体激元 (SPP) 的宽带相干完美吸收。当导电薄膜具有适当的薄层电阻时,可以在广谱范围内同时吸收两束入射的相干欺骗 SPP 波束。通过将两个入射光束之间的相位差从 0 调整到 [公式:见文本],吸收可以逐渐从接近 100% 变为接近零,这在全波模拟和微波实验中得到了验证。我们的工作将相干完美吸收理论从传播波扩展到具有宽工作带宽的显着优势的欺骗 SPP。