| Autor: |
Hsieh, Ping-Yen, Fang, Shun-Lin, Lin, Yu-Siang, Huang, Wen-Hsien, Shieh, Jia-Min, Yu, Peichen, Chang, You-Chia |
| Rok vydání: |
2022 |
| Předmět: |
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| Zdroj: |
Nanophotonics 11, 4687-4695 (2022) |
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1515/nanoph-2022-0344 |
| Popis: |
The emerging applications of silicon photonics in free space, such as LiDARs and quantum photonics, urge versatile emission shaping beyond the capabilities of conventional grating couplers. A platform that offers arbitrary shaping of free-space emission while maintaining the CMOS compatibility and monolithic integration is in pressing need. Here we demonstrate a platform that integrates metasurfaces monolithically on silicon photonic integrated circuits. The metasurfaces consist of amorphous silicon nanopillars evanescently coupled to silicon waveguides. We demonstrate experimentally diffraction-limited beam focusing with a Strehl ratio of 0.82, where the focused spot can be switched between two positions. We also realize a meta-hologram experimentally that projects an image above the silicon photonic chip. This platform can add a highly versatile interface to the existing silicon photonic ecosystems for precise delivery of free-space emission. |
| Databáze: |
arXiv |
| Externí odkaz: |
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