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arXiv 2202.13602physics.opticsphysics.app-ph
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一种多功能超颖表面,可实现超润湿性,从而实现自清洁和动态颜色响应

A versatile metasurface enabling superwettability for self-cleaning and dynamic color response

Jinlong Lu, Basudeb Sain, Philip Georgi, Maximilian Protte, Tim Bartley, Thomas Zentgraf

摘要:

超颖表面由于能够用亚波长结构调制光而提供用于各种平坦元件和器件的应用。同时,工作原理也带来了关键问题和挑战,即在日常使用中保护超颖表面免受灰尘或清洁不可避免的污染物。在这里,利用具有自清洁特性的智能仿生表面,我们展示了一个多功能的介电超颖表面,受益于所获得的超亲水或准超疏水状态。该设计通过将超颖表面嵌入大面积的润湿性支撑结构内来实现,这在制造中是高效的,并且同时实现光学和润湿性功能。超亲水状态能够增强对水的光学响应,而准超疏水状态赋予脆弱的天线自清洁灰尘污染的能力。此外,通过以可重复的方式进行适当的处理,超颖表面可以在这两种润湿性或功能状态之间容易地切换和重复,而不会降低光学性能。提出的设计策略将带来新的机会,智能元表面与改善的光学性能,多功能性和物理稳定性。

英文摘要:

Metasurfaces provide applications for a variety of flat elements and devices due to the ability to modulate light with subwavelength structures. The working principle meanwhile gives rise to the crucial problem and challenge to protect the metasurface from dust or clean the unavoidable contaminants during daily usage. Here, taking advantage of the intelligent bioinspired surfaces which exhibit self-cleaning properties, we show a versatile dielectric metasurface benefiting from the obtained superhydrophilic or quasi-superhydrophobic states. The design is realized by embedding the metasurface inside a large area of wettability supporting structures, which is highly efficient in fabrication, and achieves both optical and wettability functionality at the same time. The superhydrophilic state enables an enhanced optical response with water, while the quasi-superhydrophobic state imparts the fragile antennas an ability to self-clean dust contamination. Furthermore, the metasurface can be easily switched and repeated between these two wettability or functional states by appropriate treatments in a repeatable way, without degrading the optical performance. The proposed design strategy will bring new opportunities to smart metasurfaces with improved optical performance, versatility and physical stability.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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