In this paper we evaluate the effect of oxidation on the total power scattered in the far field by a nm radius Al sphere in the presence of a substrate comprised of either Al or silica (SiO₂). Using an effective medium approach to model the Al particle with an outer layer of alumina (Al₂O₃), we find that the UV peak of total energy scattered in the far field shifts towards longer wavelengths for volume fractions of Al₂O₃ up to . When particles with these volume fractions are held above an Al substrate, enhancement of two orders of magnitudes of the far-field power radiated by a dipole in the gap can be observed. For larger volume fractions of Al₂O₃, the total intensity of light scattered is significantly reduced.

中文翻译：

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氧化对铝膜贴片天线从可见光到紫外线的远场散射的影响

在本文中，我们评估了在存在由Al或二氧化硅（SiO ₂）组成的衬底的情况下，氧化对纳米半径的Al球在远场中散射的总功率的影响。使用有效介质的方法来将Al粒子与氧化铝的外层（Al模型₂ ö ₃），我们发现，总能量的UV峰散落在远场位移向更长的波长为的铝体积分数₂ ö ₃向上到。当具有这些体积分数的颗粒保持在Al衬底上方时，可以观察到间隙中偶极子辐射的远场功率增加了两个数量级。对于更大体积的Al ₂O ₃，散射光的总强度显着降低。