论文标题
使用单个和多个超强度激光脉冲在谐振元面中产生均匀和奇数的高谐波
Generation of even and odd high harmonics in resonant metasurfaces using single and multiple ultra-intense laser pulses
论文作者
论文摘要
高谐波生成（HHG）为强场轻型互动的基本科学打开了一个窗口，并是Attosecond光学和计量学的关键基础。纳米结构中热点的HHG共鸣是克服众所周知的气体和块状固体局限性的有吸引力的途径。我们展示了一个由强烈的中红外激光脉冲驱动的高效HHG的纳米级平台：一种超薄的磷化物磷化物（GAP）跨表面。宽带隙和缺乏间隙晶体的反转对称性，可以产生均匀和奇怪的谐波，覆盖1.3至3 eV之间的各种光子能量，并具有最小的重吸收。共同提高的转化效率促进了单发测量，避免了物质损坏，并为纳米级的轻度扰动和非扰动性方案铺平了可控的过渡方式。
High harmonic generation (HHG) opens a window on the fundamental science of strong-field light-mater interaction and serves as a key building block for attosecond optics and metrology. Resonantly enhanced HHG from hot spots in nanostructures is an attractive route to overcoming the well-known limitations of gases and bulk solids. We demonstrate a nanoscale platform for highly efficient HHG driven by strong mid-infrared laser pulses: an ultra-thin resonant gallium phosphide (GaP) metasurface. The wide bandgap and the lack of inversion symmetry of the GaP crystal enable the generation of even and odd harmonics covering a wide range of photon energies between 1.3 and 3 eV with minimal reabsorption. The resonantly enhanced conversion efficiency facilitates single-shot measurements that avoid material damage and pave the way to controllable transition between perturbative and non-perturbative regimes of light-matter interactions at the nanoscale.
