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arXiv · 2008.03619

Generation of even and odd high harmonics in resonant metasurfaces using single and multiple ultra-intense laser pulses

Maxim R. Shcherbakov·Haizhong Zhang·Michael Tripepi·Giovanni Sartorello·Noah Talisa·Abdallah AlShafey·Zhiyuan Fan·Justin Twardowski·Leonid A. Krivitsky·Arseniy I. Kuznetsov·Enam Chowdhury·Gennady Shvets
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Abstract

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.

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Maxim R. Shcherbakov, Haizhong Zhang, Michael Tripepi, Giovanni Sartorello, Noah Talisa, Abdallah AlShafey, Zhiyuan Fan, Justin Twardowski, Leonid A. Krivitsky, Arseniy I. Kuznetsov, Enam Chowdhury, Gennady Shvets. 2020-08-08. Generation of even and odd high harmonics in resonant metasurfaces using single and multiple ultra-intense laser pulses. https://doi.org/10.1038/s41467-021-24450-9

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