期刊
PHYSICAL REVIEW B
卷 89, 期 7, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.89.075408
关键词
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资金
- German Federal Ministry of Education and Research (PhoNa)
- Thuringian State Government (MeMa)
We investigate the magnetic response of meta-atoms that can be fabricated by a bottom-up technique. Usually such meta-atoms consist of a dielectric core surrounded by a large number of solid metallic nanoparticles. In contrast to those meta-atoms considered thus far, here we study hollow metallic nanoparticles (shells). In doing so, we solve one of the most pertinent problems of current self-assembled metamaterials, namely, implementing meta-atoms with sufficiently large resonance strength and small absorption. Both conditions have to be met for deep subwavelength meta-atoms to obtain effectively homogeneous metamaterials which may be meaningfully described by negative material parameters. Eventually we show that by using these findings, self-assembled negative index materials come within reach.
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