A generalized Kerker condition for highly directive nanoantennas
A generalized Kerker condition for highly directive nanoantennas
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DOI：
10.1364/ol.40.002645
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发表时间：
2015-06-01
期刊：
影响因子：
3.6
通讯作者：
Rockstuhl, C.
中科院分区：
文献类型：
--
作者：
Alaee, R.;Filter, R.;Rockstuhl, C.
具有平衡的电和磁偶极矩的纳米天线，被称为第一Kerker条件，表现出零反向散射的方向性辐射图案。原则上，如果高阶矩被适当地平衡，则纳米天线可以提供甚至更好的方向性。在这里，我们研究了一个广义的Kerker条件的例子中的纳米环纳米天线支持电偶极子和电四极矩。纳米环天线非常适合，因为两个多极矩几乎可以独立地调谐，以满足广义Kerker条件。(C)2015美国光学学会
A nanoantenna with balanced electric and magnetic dipole moments, known as the first Kerker condition, exhibits a directive radiation pattern with zero backscattering. In principle, a nanoantenna can provide even better directionality if higher order moments are properly balanced. Here, we study a generalized Kerker condition in the example of a nanoring nanoantenna supporting electric dipole and electric quadrupole moments. Nanoring antennas are well suited since both multipole moments can be almost independently tuned to meet the generalized Kerker condition. (C) 2015 Optical Society of America