2025-08-26 東京大学
多層メタサーフェスを用いた多入力多出力ベクトルビーム変換器の模式図
＜関連情報＞
- https://www.t.u-tokyo.ac.jp/press/pr2025-08-26-001
- https://www.t.u-tokyo.ac.jp/hubfs/press-release/2025/0826/001/text.pdf
- https://www.nature.com/articles/s41467-025-62401-w
多層メタサーフェスを用いた完全なベクトル光学モードコンバーター Complete vectorial optical mode converter using multi-layer metasurface
Go Soma,Kento Komatsu,Yoshiaki Nakano & Takuo Tanemura
Nature Communications Published:25 August 2025
DOI:https://doi.org/10.1038/s41467-025-62401-w
Abstract
Vectorial optical mode converters that can transform orthogonal sets of multiple input vector beams into other orthogonal sets are attractive for various applications in optics and photonics. While multi-plane light conversion (MPLC) and metasurface technologies have been explored to individually address multiple spatial mode conversion and polarization mode manipulation, there has been no universal methodology to simultaneously convert a set of multiple vectorial modes with spatially non-uniform wavefronts and polarizations. Here, we present a general device framework to achieve complete vectorial mode conversion based on the MPLC concept incorporating multi-layer metasurfaces. The effectiveness of our method is confirmed experimentally by demonstrating 6-mode (3 spatial modes × 2 polarization modes) multiplexer fabricated on a compact chip. Additionally, we apply it to design devices with more advanced functionalities: a mode-division-multiplexed dual-polarization coherent receiver and spatial-mode-multiplexed vectorial holography. The versatility of our protocol makes it a powerful tool for realizing universal optical mode converters.
