Using rare-gas ions as the interacting medium, phase-matched high-order harmonic generation up to 1-keV hard x ray can be achieved by balancing the negative plasma dispersion and Gouy phase shift with the positive, intensity-dependent, intrinsic dipole phase variation. The time-dependent phase-matching condition automatically gates the harmonic output to an isolated attosecond pulse. The estimated pulse duration is as short as 120 as.
No takes yet. Share an insight, caveat, or question.
Chu et al. (2024) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: