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首页> 外文期刊>Physical review >Plasmonic Blackbody: Almost Complete Absorption Of Light In Nanostructured Metallic Coatings
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Plasmonic Blackbody: Almost Complete Absorption Of Light In Nanostructured Metallic Coatings

机译:等离子体黑体:纳米结构金属涂层中的光几乎完全吸收

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摘要

We have experimentally demonstrated blackbodylike behavior in a thin nanostructured metallic layer shaped in the form of a composite deep diffraction grating. This behavior is recorded over a wide optical wavelength range (240-550 nm) and for a broad range of angles of light incidence (0-75°) for samples with metal thickness of just 90 nm. The strong absorption at a level of 97-99% is observed for one light polarization and is attributed to excitation of localized plasmons coupled to incident light waves. We show that the studied structures exhibit anomalies which consist in disappearance of reflection for both p- and s-polarized light at corresponding "Brewster" angles. An effective-medium approach provides a satisfactory qualitative description of the reflection and transmission spectra in our samples and confirms their blackbody behavior.
机译:我们已经通过实验证明了在以复合深衍射光栅形式形成的纳米结构金属薄层中的黑体行为。对于金属厚度仅为90 nm的样品,在较宽的光学波长范围(240-550 nm)以及较宽的入射角范围(0-75°)中记录了此行为。对于一种光偏振观察到了在97-99%的水平上的强吸收,这归因于与入射光波耦合的局部等离激元的激发。我们表明,所研究的结构表现出异常,该异常包括在相应的“布鲁斯特”角处对p偏振和s偏振光的反射消失。一种有效的中等方法可以对样品中的反射光谱和透射光谱进行令人满意的定性描述,并确定其黑体行为。

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