Spectral tunability of realistic plasmonic nanoantennas

被引：6
|
作者：
Portela, Alejandro [1 ]
Yano, Takaaki [2 ]
Santschi, Christian [3 ]
Matsui, Hiroaki [1 ]
Hayashi, Tomohiro [2 ]
Hara, Masahiko [2 ]
Martin, Olivier J. F. [3 ]
Tabata, Hitoshi [1 ]
机构：
[1] Univ Tokyo, Sch Engn, Dept Bioengn, Bunkyo Ku, Tokyo 1138656, Japan
[2] Tokyo Inst Technol, Dept Elect Chem, Midori Ku, Yokohama, Kanagawa 2268502, Japan
[3] Swiss Fed Inst Technol Lausanne, Nanophoton & Metrol Lab, CH-1015 Lausanne, Switzerland
来源：
APPLIED PHYSICS LETTERS | 2014年 / 105卷 / 09期
关键词：
RAMAN-SCATTERING; RESONANCE; SHAPE; FLUORESCENCE; SPECTROSCOPY;
D O I：
10.1063/1.4894633
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Single nanoantenna spectroscopy was carried out on realistic dipole nanoantennas with various arm lengths and gap sizes fabricated by electron-beam lithography. A significant difference in resonance wavelength between realistic and ideal nanoantennas was found by comparing their spectral response. Consequently, the spectral tunability (96 nm) of the structures was significantly lower than that of simulated ideal nanoantennas. These observations, attributed to the nanofabrication process, are related to imperfections in the geometry, added metal adhesion layer, and shape modifications, which are analyzed in this work. Our results provide important information for the design of dipole nanoantennas clarifying the role of the structural modifications on the resonance spectra, as supported by calculations. (C) 2014 AIP Publishing LLC.
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页数：5
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