Alù A, Salandrino A, Engheta N
Opt Express. 2006 Feb 20;14(4):1557-67. doi: 10.1364/oe.14.001557.
We present here the design of nano-inclusions made of properly arranged collections of plasmonic metallic nano-particles that may exhibit a resonant magnetic dipole collective response in the visible domain. When such inclusions are embedded in a host medium, they may provide metamaterials with negative effective permeability at optical frequencies. We also show how the same inclusions may provide resonant electric dipole response and, when combining the two effects at the same frequencies, left-handed materials with both negative effective permittivity and permeability may be synthesized in the optical domain with potential applications for imaging and nano-optics applications.
我们在此展示了由适当排列的等离子体金属纳米粒子集合构成的纳米内含物的设计，这些纳米内含物在可见光域可能表现出共振磁偶极集体响应。当此类内含物嵌入主体介质中时，它们可为超材料在光频下提供负的有效磁导率。我们还展示了相同的内含物如何提供共振电偶极响应，并且当在相同频率下将这两种效应结合时，可在光域合成具有负的有效介电常数和磁导率的左手材料，这在成像和纳米光学应用方面具有潜在应用价值。
