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Description
High-harmonic generation (HHG) in nanostructured media offers a pathway toward compact, ultrafast coherent light sources with intrinsic control over spatial phase and amplitude. In this work, we investigate the generation and manipulation of the 7th harmonic (114 nm) from an 800 nm driving field in engineered nanostructured platforms, with the goal of shaping extreme-ultraviolet (XUV) radiation directly at the point of emission for focusing or steering. Our approach combines large-scale finite-difference time-domain (FDTD) simulations with an estimative nonlinear generation model to capture the essential physics of harmonic emission in complex geometries while maintaining computational tractability. We explore how nanoscale structuring influences local field distributions and harmonic yield, and how these effects can be leveraged for wavefront engineering of the generated XUV light.
In particular, we demonstrate focusing through stochastic lens concepts and beam redirection via engineered phase gradients that exploit waveguiding effects at the harmonic wavelength. The nanostructures simultaneously act as nonlinear sources and functional XUV optical elements, enabling control of propagation direction and spatial profiles without external optics. This work advances the understanding of HHG in structured media and highlights the potential of integrated nanophotonic platforms for XUV beam shaping.
| Keyword-1 | High harmonic generation |
|---|---|
| Keyword-2 | Nonlinear Optics |
| Keyword-3 | FDTD |