Optical perfect absorbers have attracted much attention due to their wide applications in areas including optical sensors, energy utilization, and photocatalysis. We present the design, characterization, and experimental demonstration of a narrowband, polarization- and angular-insensitive, high-performance plasmonic metasurface absorber in near-ultraviolet region. A measured absorption peak of 89% is achieved at the wavelength of ∼380 nm, though the calculated results give near-perfect absorption at the resonance wavelength. Our findings will promote more research on metasurface absorbers in near-ultraviolet region.

中文翻译：

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近紫外区偏振和角度不敏感的完美超表面吸收体

光学完美吸收体因其在光学传感器、能源利用和光催化等领域的广泛应用而备受关注。我们介绍了近紫外区域窄带、偏振和角度不敏感的高性能等离子体超表面吸收器的设计、表征和实验演示。在 ~380 nm 的波长处实现了 89% 的测量吸收峰，尽管计算结果在共振波长处给出了近乎完美的吸收。我们的研究结果将促进对近紫外区域超表面吸收剂的更多研究。