Photoluminescence from an emitter layer sandwiched between the stack of metasurfaces
| Autor: | Katsuhisa Tanaka, Kenichi Agata, Shunsuke Murai |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Photoluminescence Fabrication Optical resonators Nanophotonics General Physics and Astronomy Physics::Optics 02 engineering and technology 01 natural sciences Stack (abstract data type) Surface plasmon resonance 0103 physical sciences Absorption (electromagnetic radiation) Common emitter 010302 applied physics business.industry Metamaterial 021001 nanoscience & nanotechnology Wavelength Metamaterials Optoelectronics Nanoparticles 0210 nano-technology business Nano optics |
| Zdroj: | Journal of Applied Physics. 129(18) |
| ISSN: | 0021-8979 |
| Popis: | The combination of metasurface with optical emitters provides a unique opportunity to control the emission. The metasurface effect strongly depends on the spectral overlap between the internal electronic transitions of the emitter and the optical resonances of the metasurface. Elaborate design of the metasurface could realize the resonances at both absorption and emission wavelengths of the emitter, but it usually leads to complexity in fabrication. In this work, we propose a very simple strategy to obtain the resonances at both wavelengths by sandwiching the emitter layer with a pair of metasurfaces designed for absorption and emission, respectively. For this purpose, we use a sticker of Al metasurface, which is the array of Al nanoparticles embedded in a flexible polymer film that can be stuck on any clean surfaces. The metasurface stack is prepared by simply placing the sticker, resonating at the emission wavelength, on the emitter layer deposited on the TiO₂ metasurface resonating at the absorption wavelength. The overall enhancement achieved for the stack of the metasurfaces can be understood roughly as the multiplication of contributions from the respective metasurfaces. Employing a sticker provides an easy-to-make way of constructing a stack of metasurfaces, which increases the degree of freedom in designing the metasurface-coupled emitters. 貼るだけで3次元ナノアンテナを作製 --サンドイッチでもっと明るく--. 京都大学プレスリリース. 2021-05-10. |
| Databáze: | OpenAIRE |
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