High-order harmonic generation yielding tunable extreme-ultraviolet radiation of high spectral purity
Year: 2003
Authors: Brandi F., Neshev D., Ubachs W.
Autors Affiliation: Laser Centre, Department of Physics and Astronomy, Vrije Universiteit, De Boelelaan, 1081 1081, Netherlands
Abstract: Production of extreme-ultraviolet radiation by high-order harmonic generation is demonstrated to yield unprecedented spectral purity of lambda/Deltalambda=2.5×10(5) at wavelengths covering the entire range 40-100 nm. Tunability and sub-cm(-1) bandwidth of the harmonics are demonstrated in recordings of the He (1s4p) and Ar (3p(5)3d(\’)) resonance lines at 52.2 and 86.6 nm. Frequency shift of the harmonics due to chirp-induced phenomena are investigated and found to be small, resulting in a frequency accuracy of about 5×10(-7) in the domain of extreme-ultraviolet radiation.
Journal/Review: PHYSICAL REVIEW LETTERS
Volume: 91 (16) Pages from: 163901-1 to: 163901-4
KeyWords: HELIUM; ATOMS; IONIZATION; RESOLUTION; BEAMLINE; Harmonic analysis
DOI: 10.1103/PhysRevLett.91.163901