Electron energy-loss spectroscopy of branched gap plasmon resonators
| Autor: | Sergey I. Bozhevolnyi, Mark L. Brongersma, Majid Esfandyarpour, Ai Leen Koh, N. Asger Mortensen, Søren Raza |
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| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
Materials science
Science General Physics and Astronomy Physics::Optics 02 engineering and technology Electron 01 natural sciences Article General Biochemistry Genetics and Molecular Biology Optics 0103 physical sciences Scanning transmission electron microscopy 010306 general physics Spectroscopy Plasmon Multidisciplinary business.industry Electron energy loss spectroscopy Surface plasmon General Chemistry 021001 nanoscience & nanotechnology Characterization (materials science) Optoelectronics 0210 nano-technology business Localized surface plasmon |
| Zdroj: | Raza, S, Esfandyarpour, M, Koh, A L, Mortensen, N A, Brongersma, M L & Bozhevolnyi, S I 2016, ' Electron energy-loss spectroscopy of branched gap plasmon resonators ', Nature Communications, vol. 7 . https://doi.org/10.1038/ncomms13790 Nature Communications, Vol 7, Iss 1, Pp 1-10 (2016) Raza, S, Esfandyarpour, M, Koh, A L, Mortensen, N A, Brongersma, M L & Bozhevolnyi, S I 2016, ' Electron energy-loss spectroscopy of branched gap plasmon resonators ', Nature Communications, vol. 7, 13790, pp. 13790 . https://doi.org/10.1038/ncomms13790 Nature Communications |
| Popis: | The miniaturization of integrated optical circuits below the diffraction limit for high-speed manipulation of information is one of the cornerstones in plasmonics research. By coupling to surface plasmons supported on nanostructured metallic surfaces, light can be confined to the nanoscale, enabling the potential interface to electronic circuits. In particular, gap surface plasmons propagating in an air gap sandwiched between metal layers have shown extraordinary mode confinement with significant propagation length. In this work, we unveil the optical properties of gap surface plasmons in silver nanoslot structures with widths of only 25 nm. We fabricate linear, branched and cross-shaped nanoslot waveguide components, which all support resonances due to interference of counter-propagating gap plasmons. By exploiting the superior spatial resolution of a scanning transmission electron microscope combined with electron energy-loss spectroscopy, we experimentally show the propagation, bending and splitting of slot gap plasmons. Here Raza et al. use using scanning transmission electron microscopy combined with electron energy-loss spectroscopy to provide detailed characterization of gap surface plasmon modes supported by a freely suspended silver nanoslit of 25 nm width. |
| Databáze: | OpenAIRE |
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