Abstract

The metals were among mostly used targets for laser ablation and HHG, while only in a few cases the crystals and semiconductor compounds being studied using this approach. In the meantime, the non-metal species could be the attractive media being ablated for harmonic generation. In this chapter, we discuss recent HHG studies in the extended plasma plumes produced on the surfaces of various non-metal materials (elemental semiconductors, oxygen- and fluorine-contained crystals, and carbon-contained clusters). We acquaint the reader with the attractive properties of those plasmas. We analyze the optimization of HHG in the extended plasma plumes using different approaches.

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