2020年6月2日 · Tabletop attosecond light sources in the soft X-ray (SXR) spectral region based on high-harmonic generation are highly desirable in chemical and material sciences since they can spectroscopically...

2023年8月3日 · High-harmonic generation (HHG) is an extreme nonlinear process in which intense pulses of light drive matter to emit high harmonics of the driving...

High-harmonic generation (HHG) is a non-linear process during which a target (gas, plasma, solid or liquid sample) is illuminated by an intense laser pulse. Under such conditions, the sample will emit the high order harmonics of the generation beam (above the fifth harmonic).

2020年9月14日 · High harmonic generation (HHG) is an extremely nonlinear effect generating coherent broadband radiation and pulse durations reaching attosecond timescales....

2024年2月1日 · Utilizing realistic simulations of high-order harmonic generation (HHG) in several materials, we study how different regions of the Brillouin zone contribute to the nonlinear response.

2002年7月19日 · A high electric field of a coherent, intense laser pulse liberates a core electron from the atom. The electron is accelerated in the laser field. The electron recombines with the atom (ion) in a very short interaction time, emitting relatively high …

Despite the fact that high order harmonic generation (HHG) aims at serving as a table-top light source for imaging applications with extremely high spatial resolution, a general lack of accurate...

2024年12月17日 · We attribute the spectrum broadening to a cascaded HHG process: argon-generated extreme ultraviolet photons excite helium's outer electrons, which are then driven by the fundamental laser field to contribute to HHG. This finding aligns with previous studies, showing that mixing gases with low and high ionization potentials can enhance HHG.

2024年1月11日 · We identify the topological properties of the harmonic field as unique probes, sensitive to both the microscopic and macroscopic features of the target’s complex non-linear response.

2019年11月6日 · With the development of laser technology, high-order harmonic generation (HHG) as the laser source gives access to generate XUV, soft x-ray light that has available continuum bandwidth capable of supporting pulse durations of a few tens to hundreds of attoseconds [2–4].