Mapping of plasmonic resonances in nanotriangles.
Mapping of plasmonic resonances in nanotriangles.
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DOI：
10.3762/bjnano.4.66
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发表时间：
2013
影响因子：
3.1
通讯作者：
Leiderer P
中科院分区：
文献类型：
--
作者：
Dickreuter S;Gleixner J;Kolloch A;Boneberg J;Scheer E;Leiderer P
通过用短激光脉冲照射这些结构并对由此产生的烧蚀和熔化图案进行成像，研究了金属纳米三角形中的等离子体共振。在Si衬底上制备了厚度为40 nm、边长约为10 nm的三角形金结构。500纳米。用波长为800 nm的单个飞秒和皮秒激光脉冲进行照射，其在这些三角形中激发高阶等离子体激元模式。纳米结构的小部分的烧蚀分布以及局部熔化反映了大的近场增强的区域。所观察到的图案再现非常详细的三维模型的FDTD模拟，只要计算不是基于理想化的，但在现实的结构。在这个逼真的模型中，三角形边缘的确切形状和结构的介电环境等细节都被考虑在内。场增强的实验数值通常比计算值小一些。结果表明，FDTD模拟和潜在的警告和“近场摄影”的局限性，通过局部消融和熔化复杂的等离子体场及其应用的映射。
Plasmonic resonances in metallic nano-triangles have been investigated by irradiating these structures with short laser pulses and imaging the resulting ablation and melting patterns. The triangular gold structures were prepared on Si substrates and had a thickness of 40 nm and a side length of ca. 500 nm. Irradiation was carried out with single femtosecond and picosecond laser pulses at a wavelength of 800 nm, which excited higher order plasmon modes in these triangles. The ablation distribution as well as the local melting of small parts of the nanostructures reflect the regions of large near-field enhancement. The observed patterns are reproduced in great detail by FDTD simulations with a 3-dimensional model, provided that the calculations are not based on idealized, but on realistic structures. In this realistic model, details like the exact shape of the triangle edges and the dielectric environment of the structures are taken into account. The experimental numbers found for the field enhancement are typically somewhat smaller than the calculated ones. The results demonstrate the caveats for FDTD simulations and the potential and the limitations of “near field photography” by local ablation and melting for the mapping of complex plasmon fields and their applications.
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影响因子：
8.6
作者：
Cinchetti, M;Gloskovskii, A;Kreiter, M
通讯作者：
Kreiter, M
影响因子：
13.3
作者：
Gwinner, Michael Christian;Koroknay, Elisabeth;Giessen, Harold
通讯作者：
Giessen, Harold
影响因子：
56.9
作者：
Habenicht, A;Olapinski, M;Boneberg, J
通讯作者：
Boneberg, J
影响因子：
4
作者：
DECKMAN, HW;DUNSMUIR, JH
通讯作者：
DUNSMUIR, JH
DOI：
10.1007/s00339-003-2118-4
发表时间：
2003-07-01
影响因子：
2.7
作者：
Bärsch, N;Körber, K;Tönshoff, KH
通讯作者：
Tönshoff, KH