AI-assisted on-chip nanophotonic convolver based on silicon metasurface
| Autor: | Liao Kun, Gan Tianyi, Hu Xiaoyong, Gong Qihuang |
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| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: | |
| Zdroj: | Nanophotonics, Vol 9, Iss 10, Pp 3315-3322 (2020) |
| Druh dokumentu: | article |
| ISSN: | 2192-8606 2192-8614 |
| DOI: | 10.1515/nanoph-2020-0069 |
| Popis: | Convolution operation is of great significance in on-chip all-optical signal processing, especially in signal analysis and image processing. It is a basic and important mathematical operation in the realization of all-optical computing. Here, we propose and experimentally implement a dispersionless metalens for dual wavelengths, a 4f optical processing system, and then demonstrate the on-chip nanophotonic convolver based on silicon metasurface with the optimization assistance of inverse design. The characteristic size of the dispersionless metalens device is 8 × 9.4 μm, and the focusing efficiency is up to 79% and 85% at wavelengths of 1000 and 1550 nm, respectively. The feature size of the convolver is 24 × 9.4 μm, and the proposed convolver allows spatial convolution operation on any desired function at dual wavelengths simultaneously. This work provides a potential scheme for the further development of on-chip all-optical computing. |
| Databáze: | Directory of Open Access Journals |
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