Scientific Results

Perspectives of Ramsey Schemes Based on High-Order Harmonics for High-Resolution XUV Spectroscopy

Year: 2010

Authors: Pirri A., Sali E., Corsi C., Bellini M., Cavalieri S., Eramo R.

Autors Affiliation: European Laboratory for NonLinear Spectroscopy (LENS), Università di Firenze, Via N. Carrara 1, I50019 Sesto Fiorentino, Firenze, Italy; Dipartimento di Fisica and CNISM, Università di Firenze, Via G. Sansone 1, I-50019 Sesto Fiorentino, Firenze, Italy;
Istituto Nazionale di Ottica Applicata (CNR), Largo E. Fermi 6, I-50125 Firenze, Italy

Abstract: We present an experimental and theoretical investigation of Ramsey-type interference fringes using high-order harmonic generation. The ninth harmonic (lambda similar or equal to 88 nm) of a femtosecond Ti:sapphire laser was used to excite a pair of autoionizing states of krypton. The outcome of the ionization process, detected by an ion-mass spectrometer, shows the characteristic quantum interference pattern. The behavior of the fringe contrast was interpreted on the basis of a simple analytical model, which reproduced well the experimental results without any free parameter. Finally, we also present a proposal for a similar experiment to be performed on high-lying bound state of atomic argon, with the aim of achieving even higher resolving power.

Journal/Review: LASER PHYSICS

Volume: 20 (5)      Pages from: 1119  to: 1125

More Information: Ente Cassa di Risparmio di Firenze. JRA1. 228334. – ACKNOWLEDGMENTS This research has been performed at LENS. We acknowledge Riccardo Ballerini and Ahmed Hajeb for the accurate mechanical realizations, and Mauro Giuntini, Marco De Pas, and Alessio Montori for pro viding their assistance in the set up of the electronics. This work was partially supported by Ente Cassa di Risparmio di Firenze and by the EC’s FP7 under grant agreement no. 228334 (JRA1: ALADIN).
KeyWords: Analytical model; Autoionizing state; Bound state; Femtoseconds; Free parameters; Fringe contrasts; High order harmonic generation; High order harmonics; High resolution; Interference fringe; Ionization process; Quantum interference patterns; Theoretical investigations; Ti: Sapphire laser; Xuv spectroscopy, Argon; Krypton; Mathematical models; Sapphire; Spectrometers, Harmonic analysis
DOI: 10.1134/S1054660X10090215

Citations: 4
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English