High-harmonic generation articles from across Nature Portfolio

Water window imaging with high-harmonic generation is achieved using soft X-ray coherence tomography (SXCT), revealing the cross-sectional structure of buried nanolayers with 12 nm axial resolution.

Laser-printed gold metasurface supporting symmetry-protected plasmonic quasi-bound states in the continuum (qBIC) was fabricated, comprehensively characterized and applied to demonstrate the first qBIC-empowered field-effect transistor device with HgTe quantum dot active medium.

High-harmonic generation from metasurfaces is believed to follow conventional power laws with integer exponents. In this work, authors discover that the strong local fields related to a metasurface high-Q resonances can modify the effective nonlinear response and enable the generation of high harmonics following non-integer-power laws.

High-harmonic generation (HHG) in organic molecular crystals was previously demonstrated only in the non-perturbative regime. Here, the authors demonstrate HHG up to the 17th order in pentacene crystals, with a strong orientational dependence caused by the neighbouring molecules.

Here, the authors demonstrate that intense laser pulses drive electrons across the full Brillouin zone in monolayer WS₂, producing quantum interferences that control high harmonic generation.

A plasma lens capable of focusing broadband extreme-ultraviolet attosecond pulses is demonstrated.

A gallium arsenide-based terahertz quantum cascade laser harnesses graphene plasmons and optical nonlinearity to push the laser emission into the elusive far-end of the terahertz region.

A nonlinear optical response to a new form of light, dubbed chiral topological light owing to its local chirality and global topological characteristics, is enabling unprecedented enantiosensitivity and robustness of chiro-optical spectroscopies as a result of structured light–matter interactions at deep subwavelength scales.

High efficiency and dynamic modulation of third-harmonics generation (THG) is realized by integrating the giant nonlinear responses resulted from intersubband transitions of multiple quantum well (MQW) with plasmonic nano-resonator.

High harmonic generation has long been successfully described using the semi-classical three-step model. However, recent progress has introduced a quantum optical formulation, exposing the limitations of the semi-classical picture.

Polycrystalline films of the non-toxic element bismuth exhibit a room-temperature surface nonlinear Hall effect, which could make devices based on topological quantum effects more practical.

Generating high harmonics or attosecond pulses of light is normally thought of as a classical process, but a theoretical study has now shown how the process could be driven by quantum light.