Shape Matters: Plasmonic Nanoparticle Shape Enhances Interaction with Dielectric Substrate

被引：115

作者：

Albella, Pablo ^{[2
]}

Garcia-Cueto, Borja ^{[2
]}

Gonzalez, Francisco ^{[2
]}

Moreno, Fernando ^{[2
]}

Wu, Pae C. ^{[3
]}

Kim, Tong-Ho ^{[3
]}

Brown, April ^{[3
]}

Yang, Yang ^{[4
]}

Everitt, Henry O. ^{[3
,4
,5
]}

Videen, Gorden ^{[1
]}

机构：

[1] USA, Res Lab, RMRD CIE S, Adelphi, MD 20783 USA

[2] Univ Cantabria, Dept Fis Aplicada, Grp Opt, E-39005 Santander, Spain

[3] Duke Univ, Dept Elect & Comp Engn, Durham, NC 27708 USA

[4] Duke Univ, Dept Phys, Durham, NC 27708 USA

[5] USA, Aviat & Missile RD & E Ctr, RDMR WS, Redstone Arsenal, AL 35898 USA

来源：

NANO LETTERS | 2011年 / 11卷 / 09期

关键词：

UV plasmonics; nanoparticles; gallium; shape effects; substrate effects; nanoantenna; DISCRETE-DIPOLE APPROXIMATION; OPTICAL-PROPERTIES; METAL NANOPARTICLES; RESONANCE SPECTROSCOPY; SCATTERING; PARTICLE;

D O I：

10.1021/nl201783v

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Numerical analyses of the ultraviolet and visible plasmonic spectra measured from hemispherical gallium nanostructures on dielectric substrates reveal that resonance frequencies are quite sensitive to illumination angle and polarization in a way that depends on nanostructure size, shape, and substrate. Large, polarization-dependent splittings arise from the broken symmetry of hemispherical gallium nanoparticles on sapphire substrates, inducing strong interactions with the substrate that depend sensitively on the angle of illumination and the nanoparticle diameter.

引用

页码：3531 / 3537

页数：7

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