Coating effect on optical resonance of plasmonic nanobowtie antenna

被引：39

作者：

Lin, Tzy-Rong ^{[1
,2
]}

Chang, Shu-Wei ^{[1
]}

Chuang, Shun Lien ^{[1
]}

Zhang, Zhaoyu ^{[3
,4
]}

Schuck, P. James ^{[3
]}

机构：

[1] Univ Illinois, Dept Elect & Comp Engn, Urbana, IL 61801 USA

[2] Natl Taiwan Ocean Univ, Dept Mech & Mechatron Engn, Chilung 20224, Taiwan

[3] Univ Calif Berkeley, Lawrence Berkeley Lab, Mol Foundry, Berkeley, CA 94720 USA

[4] Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA

来源：

APPLIED PHYSICS LETTERS | 2010年 / 97卷 / 06期

关键词：

alumina; bow-tie antennas; dielectric materials; gold; nanophotonics; nanostructured materials; optical films; plasmonics; red shift; refractive index; WAVE-GUIDE; LASER; NANOPARTICLES;

D O I：

10.1063/1.3478228

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We investigate the effect of dielectric coating on the optical resonance of metallic bowtie nanoantennas, both theoretically and experimentally. The resonance wavelengths of the nanostructures measured by means of dark-field scattering spectroscopy are in excellent agreement with our theoretical calculations. The resonance wavelength is redshifted as the thickness of the coating layer increases, which is attributed to a longer effective optical path due to the larger refractive index of the coating than that of the air. (C) 2010 American Institute of Physics. [doi:10.1063/1.3478228]

引用

页数：3

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