Ramsey-type spectroscopy with high-order harmonics

Year: 2002

Authors: Cavalieri S., Eramo R., Materazzi M., Corsi C., Bellini M.

Autors Affiliation: Istituto Nazionale per la Fisica della Materia (INFM), Unità di Ricerca di Firenze, Via Sansone 1, 50019 Sesto Fiorentino, Italy;
Departimento di Fisica, Università di Firenze, Via Sansone 1, 50019 Sesto Fiorentino, Italy;
European Laboratory for Non-Linear Spectroscopy (LENS), Università di Firenze, Via Nello Carrara 1, 50019 Sesto Fiorentino, Italy;
Istituto Nazionale per la Fisica della Materia (INFM), Unità di Ricerca de L’Aquila, Dipartimento Fisica, Facoltà di Scienze, Università dell’Aquila, Via Vetoio, Coppito, 67100, L’Aquila, Italy;
Istituto Nazionale di Ottica Applicata, Largo E. Fermi 6, 50125 Firenze, Italy

Abstract: We present an experiment where Ramsey-type spectroscopy is applied to autoionizing states of krypton by using the ninth harmonic (88 nm) of a femtosecond Ti:sapphire laser. The ionization process, detected by an electron-energy spectrometer, shows the characteristic quantum interference pattern. The behavior of the fringe contrast compares favorably with a simple essential-state model, whose parameters have been taken from the literature. The experiment shows the feasibility of high-resolution spectroscopy in the extreme ultraviolet by using high-order laser harmonics.

Journal/Review: PHYSICAL REVIEW LETTERS

Volume: 89 (13)      Pages from: 133002  to: 133002

KeyWords: Diffraction gratings; Electronic density of states; Interferometers; Krypton; Monochromators; Phosphors; Photoionization; Photomultipliers; Piezoelectric transducers; Quantum interference phenomena; Solid state lasers; Spectroscopic analysis, High resolution spectroscopy, High energy physics; Pulses; Interferometry; Resolution; Resonances
DOI: 10.1103/PhysRevLett.89.133002

Citations: 49
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