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arXiv 1301.7142physics.optics
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使用空间多路复用等离子体共振金属正方形结构的多光谱近完美超材料吸收器

Multi-spectral near perfect metamaterial absorbers using spatially multiplexed plasmon resonance metal square structures

Boyang Zhang, Joshua Hendrickson, Junpeng Guo

摘要:

利用多路复用金属正方形等离子体共振结构,在多光谱波长下实现了近完美的红外线吸收。在两个单独的波长下,在双波段超材料吸收器中观察到超过95%的光功率吸收,并且在三个单独的波长下,在三波段超材料吸收器中观察到超过92.5%的光功率吸收。峰值吸收波长主要由多路复用结构中的金属正方形的尺寸确定。在峰值吸收波长处计算了介质间隔层中间的电场分布。结果表明,强的光吸收对应于超材料结构中的局部四极等离子体共振模式。

英文摘要:

Near perfect infrared light absorption at multi-spectral wavelengths has been experimentally demonstrated by using multiplexed metal square plasmon resonance structures. Optical power absorption over 95% has been observed in dual-band metamaterial absorbers at two separate wavelengths and optical power absorption over 92.5% has been observed in triple-band metamaterial absorbers at three separate wavelengths. The peak absorption wavelengths are primarily determined by the sizes of the metal squares in the multiplexed structures. Electrical field distributions in the middle of the dielectric spacer layer were calculated at the peak absorption wavelengths. It is shown that strong light absorption corresponds to the local quadrupole plasmon resonance modes in the metamaterial structures.

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