تقرير
Electron energy-loss spectroscopy on freestanding perforated gold films
| العنوان: | Electron energy-loss spectroscopy on freestanding perforated gold films |
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| المؤلفون: | Prämassing, M., Kiel, T., Irsen, S., Busch, K., Linden, S. |
| المصدر: | Phys. Rev. B 103, 115403 (2021) |
| سنة النشر: | 2021 |
| المجموعة: | Condensed Matter Physics (Other) |
| مصطلحات موضوعية: | Condensed Matter - Materials Science, Physics - Optics |
| الوصف: | We report on a combined far- and near-field study of surface plasmon polaritons on freestanding perforated gold films. The samples are fabricated by focused ion beam milling of {a periodic hole array into} a carbon membrane followed by thermal evaporation of gold and plasma ashing of the carbon film. Optical transmission spectra show a series of characteristic features, which can be attributed to the excitation of surface plasmon modes via the periodic nanohole array. The corresponding near-field distributions are mapped by electron energy-loss spectroscopy. Besides the optically bright surface plasmon modes, we observe in the near-field an additional dark plasmon mode, which is absent in the normal incidence far-field spectra. Our experimental results are in good agreement with numerical computations based on a discontinuous Galerkin time-domain method. |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevB.103.115403 |
| URL الوصول: | http://arxiv.org/abs/2101.02105 |
| رقم الأكسشن: | edsarx.2101.02105 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevB.103.115403 |
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