Ramsey-Type Spectroscopy with High-Order Harmonics

Stefano Cavalieri, Roberto Eramo, Marzia Materazzi, Chiara Corsi, and Marco Bellini

Phys. Rev. Lett. 89, 133002 – Published 5 September 2002

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.

Received 23 May 2002

DOI:https://doi.org/10.1103/PhysRevLett.89.133002

Authors & Affiliations

Stefano Cavalieri^1,2,3, Roberto Eramo⁴, Marzia Materazzi⁵, Chiara Corsi^1,3, and Marco Bellini^1,5

¹Istituto Nazionale per la Fisica della Materia (INFM) Unità di Ricerca di Firenze, Via Sansone 1, I-50019 Sesto Fiorentino, Italy
²Dipartimento di Fisica, Università di Firenze, Via Sansone 1, I-50019 Sesto Fiorentino, Italy
³European Laboratory for Non-Linear Spectroscopy (LENS), Università di Firenze, Via Nello Carrara 1, I-50019 Sesto Fiorentino, Italy
⁴Istituto Nazionale per la Fisica della Materia (INFM) Unità di Ricerca de L’Aquila, Dipartimento di Fisica, Facoltà di Scienze, Università dell’Aquila, via Vetoio, Coppito, I-67100 L’Aquila, Italy
⁵Istituto Nazionale di Ottica Applicata, Largo Enrico Fermi 6, I-50125 Firenze, Italy

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Issue

Vol. 89, Iss. 13 — 23 September 2002

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