Rockstuhl C, Scharf T
Institute of Condensed Matter Theory and Solid State Optics, Friedrich Schiller University Jena, Max-Wien Platz 1, 07743 Jena, Germany.
J Microsc. 2008 Feb;229(Pt 2):281-6. doi: 10.1111/j.1365-2818.2008.01901.x.
The properties of an ensemble of densely packed metallic nanoparticles and the effective material properties of a metamaterial based on them are studied in detail using rigorous diffraction theory. We show that in the spectral vicinity of the plasmon resonance, the metamaterial shows a well-defined Lorentzian resonance in its effective permittivity whereas the permeability is unaltered. The metamaterial shows a stop band in the spectral domain where the real part of the effective permittivity is negative. Modifying the effective properties of the metamaterial allows efficient tuning of the band-gap properties. The implementation of the proposed approach towards a band-gap metamaterial employing self-organization in liquid crystals is discussed.
利用严格的衍射理论，详细研究了密集排列的金属纳米颗粒集合的性质以及基于它们的超材料的有效材料性质。我们表明，在等离子体共振的光谱附近，超材料在其有效介电常数中表现出明确的洛伦兹共振，而磁导率不变。超材料在有效介电常数实部为负的光谱域中显示出一个阻带。修改超材料的有效性质可以有效地调节带隙性质。讨论了所提出的在液晶中采用自组织实现带隙超材料的方法。
