Large-angle beaming from asymmetric nanoslit-corrugation structures
| Autor: | Guoguo Kang, Jari Turunen, Markku Kuittinen, Khairul Alam, Peng Li, Henri Partanen |
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| Rok vydání: | 2019 |
| Předmět: |
Materials science
business.industry Mechanical Engineering Gold film Bioengineering Ranging Context (language use) 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Optics Mechanics of Materials Physics::Accelerator Physics General Materials Science Electrical and Electronic Engineering 0210 nano-technology business Phase modulation Electron-beam lithography Intensity (heat transfer) |
| Zdroj: | Nanotechnology. 31(14) |
| ISSN: | 1361-6528 |
| Popis: | The beaming effect in single apertures surrounded by periodic corrugations and the manipulation of beaming directions from such structures has gained considerable attention since discovered. Different materials and structural profiles have been studied in this context but directional beaming at angles larger than 45° has not been achieved. Nanoslits in a gold film flanked by corrugations, which give rise to beaming angles ranging from 0° to 60°, are designed and demonstrated. While the previous designs are based on achieving constructive interference at the aimed beaming angle, the approach presented in this article complements such constructive interference with destructive interference at 0° and, as a result, enhances the directional beaming effect at angles larger than 45°. The structures are fabricated by electron beam lithography with two consecutive lift-off processes. The experimental far-field intensity distributions agree well with the designs. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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