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arXiv physics/0511246physics.optics
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金属-电介质-金属层状微球中增强的表面等离子体共振吸收

Enhanced surface plasmon resonance absorption in metal-dielectric-metal layered microspheres

Keisuke Hasegawa, Charles A. Rohde, Miriam Deutsch

摘要:

对介观金属-电介质-金属微球的表面等离子体共振色散关系进行了理论研究。通过分析麦克斯韦方程组的解决方案,我们得到了一个简单的几何条件,该系统具有一个带的表面等离子体模式的谐振频率弱依赖于多极数。使用修改的米氏计算,我们发现,大量的模式属于这个平坦的色散带可以同时激发的平面波,从而提高了吸收截面。我们表明,增强的吸收峰的球体是几何可调的在整个可见光范围内。

英文摘要:

We present a theoretical study of the dispersion relation of surface plasmon resonances of mesoscopic metal-dielectric-metal microspheres. By analyzing the solutions to Maxwell's equations, we obtain a simple geometric condition for which the system exhibits a band of surface plasmon modes whose resonant frequencies are weakly dependent on the multipole number. Using a modified Mie calculation, we find that a large number of modes belonging to this flat-dispersion band can be excited simultaneously by a plane wave, thus enhancing the absorption cross-section. We demonstrate that the enhanced absorption peak of the sphere is geometrically tunable over the entire visible range.

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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