Direct interferometric measurement of the atomic dipole phase in high-order harmonic generation

Year: 2006

Authors: Corsi C., Pirri A., Sali E., Tortora A., Bellini M.

Autors Affiliation: LENS, Via Nello Carrara 1, 50019 Sesto Fiorentino, Florence, Italy; Department of Physics, University of Florence, Via Sansone 1, 50019 Sesto Fiorentino, Florence, Italy; Istituto Nazionale di Ottica Applicata, L.go E. Fermi, 6, I-50125, Florence, Italy

Abstract: We report the first direct measurements of the atomic dipole phase in the process of high-order harmonic generation. Differently from previously reported studies based on frequency chirp measurements, we use extreme ultraviolet interferometry as the most natural and direct way to measure phase shifts. Our approach has the important advantage of allowing us to investigate the effects associated to both the main quantum paths involved in the emission of a particular harmonic, thus offering a particularly clear and simple picture of the underlying electronic dynamics.

Journal/Review: PHYSICAL REVIEW LETTERS

Volume: 97 (2)      Pages from: 023901-1  to: 023901-4

KeyWords: Atomic physics; Interferometry; Phase shift; Quantum theory; Ultraviolet devices, Atomic dipole phase; Frequency chirp measurements; Interferometric measurement; Quantum paths, Harmonic generation
DOI: 10.1103/PhysRevLett.97.023901

Citations: 42
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