Imaging optical near fields at metallic nanoscale voids

P. D. Lacharmoise; N. G. Tognalli; A. R. Goni; M. I. Alonso; A. Fainstein; R. M. Cole; J. J. Baumberg; J. Garcia de Abajo; P. N. Bartlett

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Imaging optical near fields at metallic nanoscale voids

机译：在金属纳米级空隙处成像光学近场

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Direct imaging of the electromagnetic fields generated by plasmon excitation at gold nanoscale voids is achieved with high spatial resolution using scanning near-field optical microscopy (SNOM). The spatial intensity distribution of the electromagnetic field in spherical Au void structures strongly depends on the light excitation wavelength and on the diameter and degree of truncation of the voids. Comparing the SNOM results with reflectivity measurements and boundary element calculations allows for a clear identification of the plasmon modes being activated in each case. The unique mapping of the high-field regions provides key information for the use of void nanostructures as substrates for surface-enhanced Raman scattering.

机译：使用扫描近场光学显微镜（SNOM）以高空间分辨率实现了在金纳米级空隙上由等离激元激发产生的电磁场的直接成像。球形金空洞结构中电磁场的空间强度分布在很大程度上取决于光激发波长以及空洞的直径和截断程度。将SNOM结果与反射率测量结果和边界元素计算进行比较，可以清楚地识别在每种情况下激活的等离激元模式。高场区域的独特映射为使用空隙纳米结构作为表面增强拉曼散射的基底提供了关键信息。

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《Physical review》 |2008年第12期|666-670|共5页
作者
P. D. Lacharmoise; N. G. Tognalli; A. R. Goni; M. I. Alonso; A. Fainstein; R. M. Cole; J. J. Baumberg; J. Garcia de Abajo; P. N. Bartlett;
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near-field scanning microscopy and spectroscopy; collective excitations (including excitons, polarons, plasmons and other charge-density excitations); localization effects (anderson or weak localization); nanoscale materials and structures: fabrication and characterization;

机译：近场扫描显微镜和光谱学;集体激发（包括激子;极化子;等离激元和其他电荷密度激发）;本地化影响（安德森或弱本地化）;纳米级材料和结构：制造和表征;

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7. Imaging optical near fields at metallic nanoscale voids [O] . Lacharmoise, P. D., Tognalli, N.G., Goñi, A. R., 2012

机译：在金属纳米级空隙处成像光学近场

Imaging optical near fields at metallic nanoscale voids

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