Magnetized Spiral Chains of Plasmonic Ellipsoids for One-Way Optical Waveguides

被引：96
|
作者：
Hadad, Y. [1 ]
Steinberg, Ben Z. [1 ]
机构：
[1] Tel Aviv Univ, Sch Elect Engn, IL-69978 Tel Aviv, Israel
来源：
PHYSICAL REVIEW LETTERS | 2010年 / 105卷 / 23期
关键词：
Plasmonics;
D O I：
10.1103/PhysRevLett.105.233904
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
When a linear chain of plasmonic nanoparticles is subject to longitudinal magnetic field, it exhibits optical Faraday rotation. If the magnetized nanoparticles are plasmonic ellipsoids arranged as a spiral chain, the interplay between the Faraday rotation and the geometrical spiral rotation (structural chirality) can strongly enhance nonreciprocity. This interplay forms a waveguide that permits one-way propagation only, within four disjoint frequency bands, two bands for each direction.
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页数：4
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