Attosecond inner-shell lasing at angstrom wavelengths.

ABSTRACT: Since the invention of the laser, nonlinear effects such as filamentation¹, Rabi cycling^2,3 and collective emission⁴ have been explored in the optical regime, leading to a wide range of scientific and industrial applications^5-8. X-ray free-electron lasers (XFELs) have extended many optical techniques to X-rays for their advantages of ångström-scale spatial resolution and elemental specificity⁹. An example is XFEL-driven inner-shell Kα₁ (2p_3/2 → 1s_1/2) X-ray lasing in elements ranging from neon to copper, which has been used for nonlinear spectroscopy and development of new X-ray laser sources^10-16. Here we show that strong lasing effects similar to those in the optical regime can occur at 1.5

SUBMITTER: Linker TM 

PROVIDER: S-EPMC12314423 | biostudies-literature | 2025 Jun

REPOSITORIES: biostudies-literature