AI 中文总结
本文提出并验证了一种将多层介质腔集成到一维光栅的纳米光子架构，实现可见光波段宽调谐法诺共振，具备无刻蚀制备、强局域场积累等优势，可用于光子器件、显示印刷及量子技术等领域。
AI 中文摘要
法诺共振的特征是由窄带离散共振态与宽带连续态之间的干涉产生独特、尖锐且不对称的光谱线形，为纳米尺度下光与物质相互作用的调控提供了丰富机遇。本文提出并验证了一种纳米光子架构，该架构将多层介质腔集成到一维光栅中，可通过设计实现法诺共振的出色调谐范围，在可见光波段（500至694纳米）覆盖194纳米的范围，即便采用厚度仅80纳米的超薄腔层，也具备制备高度紧凑光子器件的潜力。通过调整腔的结构参数，可精确调控法诺光谱位置，使腔区域内产生强局域场积累，最大达26倍。此外，该架构可在可见光中实现明亮且饱和的结构色，为先进数字显示与印刷技术提供了可行路径。重要的是，采用简单的无刻蚀制备工艺即可达到实验性能，大幅降低了制备复杂度与工艺诱导的光学退化。本研究展示了一种稳健平台，有望应用于可见光波段基于法诺共振的低损耗纳米激光器、片上光子器件、光通信组件及下一代量子技术。
英文摘要
Fano resonances, characterized by a unique, sharp, and asymmetric spectral line shape arising from the interference between a narrowband discrete resonant state and a broadband continuum state, provide rich opportunities to control and manipulate light-matter interactions at the nanoscale. Here, we propose and demonstrate a nanophotonic architecture that integrates a multi-layered dielectric cavity into a one-dimensional grating to achieve an outstanding range of Fano resonance tunability by design, spanning 194 nm across the visible (from 500 to 694 nm), even with an ultra-thin layer of cavity (80 nm thick), offering the potential of highly compact photonic devices. The precise tailoring of the Fano spectral position through the adjustment of the cavity's structural parameters enables strongly localized field accumulation (at a maximum of 26 folds) within the cavity region. Additionally, the proposed architecture allows for bright and saturated structural colors in the visible, promising a route toward advanced digital display and printing technologies. Importantly, the experimental performance achieved with a simple, etch-free fabrication process results in a significant reduction in fabrication complexity and process-induced optical degradation. Our work showcases a robust platform for possible applications in Fano resonance-based low-loss nanolasers, on-chip photonic devices, optical communication components, and next-generation quantum technologies in the visible range.
