Temporal coherence of ultrashort high-order harmonic pulses
Anno: 1998
Autori: Bellini M., Lyngå, C., Tozzi, A., Gaarde, M.B., Hänsch, T.W., L’Huillier, A., Wahlström, C.-G.
Affiliazione autori: European Laboratory for Non Linear Spectroscopy, Largo E. Fermi, 2, Florence, I-50125, Italy;
Istituto Nazionale di Fisica della Materia, INFM, Florence, Italy;
Department of Physics, Lund Institute of Technology, P.O. Box 118, Lund, S-221 00, Sweden
Abstract: We have studied the temporal coherence of high-order harmonics (up to the 15th order) produced by focusing 100 fs laser pulses into an argon gas jet. We measure the visibility of the interference fringes, produced when two spatially separated harmonic sources interfere in the far field, as a function of the time delay between the two sources. In general, we find long coherence times, comparable to the expected pulse durations of the harmonics. For some of the harmonics, the interference pattern exhibits two regions, with significantly different coherence times. These results are interpreted in terms of different electronic trajectories contributing to harmonic generation. © 1998 American Physical Society.
Giornale/Rivista: PHYSICAL REVIEW LETTERS
Volume: 81 (2) Da Pagina: 297 A: 300
Parole chiavi: Generation; Radiation; LaserDOI: 10.1103/PhysRevLett.81.297Citazioni: 333dati da “WEB OF SCIENCE” (of Thomson Reuters) aggiornati al: 2024-05-05Riferimenti tratti da Isi Web of Knowledge: (solo abbonati) Link per visualizzare la scheda su IsiWeb: Clicca quiLink per visualizzare la citazioni su IsiWeb: Clicca qui