Ultralong phase-correlated networks of plasmonic nanoantennas coherently driven by photonic modes
Ultralong phase-correlated networks of plasmonic nanoantennas coherently driven by photonic modes
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DOI：
10.1016/j.apmt.2020.100932
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发表时间：
2021-03
影响因子：
8.3
通讯作者：
S. M. Sadeghi;Rithvik R. Gutha
中科院分区：
文献类型：
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作者：
S. M. Sadeghi;Rithvik R. Gutha
我们研究了相干激发等离子体偶极子及其相位相关耦合，提供了金属纳米天线的超长相干网络。这是通过考虑具有随机大小和形状的Au纳米岛在具有长和纳米级宽度的条带中彼此靠近来实现的。纳米岛在这种条带中的位置波动，形成一维无序阵列。我们证明，一旦这样的结构周期性地重复，从而满足瑞利异常条件，光子晶格模式可以驱动纳米岛的等离激元模式，其频率由这些模式决定。这使得纳米岛可以作为纳米级天线，在相位上被激发，并在远大于单个纳米岛大小的距离上与相邻的纳米天线相干耦合。在这些条件下，无序阵列作为一个网络，其中相干规范分布在远长于单个纳米岛的尺度上。
We study coherently-stimulated plasmonic dipoles and their phase-correlated coupling, offering ultralong coherent networks of metallic nanoantennas. This is done by considering Au nanoislands with random sizes and shapes placed in close vicinity of each other in a strip with long length and nanoscale width. The positions of the nanoislands in such a strip fluctuate, forming a one-dimensional disordered array. We demonstrate that once such a structure is periodically repeated such that the Rayleigh anomaly condition is satisfied, the photonic lattice modes can drive the plasmon modes of the nanoislands at frequencies dictated by such modes. This allows the nanoislands to act as nano-scale antennas that are excited in phase and are coupled to the neighboring nanoantennas coherently over distances far larger than the sizes of the individual nanoislands. Under these conditions the disordered array acts as a network wherein coherent specifications are distributed in scales far longer than those of the individual nanoislands.