Near-field optical response of periodically arrayed plasmonic nanogap antennas

被引：4

作者：

Sakai, Kyosuke ^{[1
]}

Nomura, Kensuke ^{[1
]}

Tanaka, Yoshito ^{[1
]}

Sasaki, Keiji ^{[1
]}

机构：

[1] Hokkaido Univ, Res Inst Elect Sci, Kita Ku, Sapporo, Hokkaido 0010020, Japan

来源：

JOURNAL OF APPLIED PHYSICS | 2013年 / 114卷 / 02期

关键词：

NANOANTENNAS; SCATTERING;

D O I：

10.1063/1.4813129

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We have studied two-dimensional periodically arrayed plasmonic nanogap antennas that exploit a "resonant coupling effect," efficiently collecting incident light and enhancing the nanogap field. A theoretical investigation was carried out on an infinite array of gold nanoblock dimers in a square-lattice arrangement. Under resonant conditions, the near-field intensity spectra in the gap region showed a narrow peak (full width at half maximum of 50 nm) with a field enhancement that was a factor of similar to 5 stronger than that of an isolated single-nanogap antenna. The influence of the geometrical parameters of the array (period, dimer orientation, nanogap size, and number of periods) is discussed. (C) 2013 AIP Publishing LLC.

引用

页数：4

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