High-order harmonic generation in fullerenes using few-and multi-cycle pulses of different wavelengths

Francesco Saverio Persico, Emilio Fiordilino, Dario Cricchio, Tobias Witting, Felix Frank, William A. Okell, Christopher Hutchison, Sébastien Weber, Amelle Zair, John W.G. Tisch, Rashid A. Ganeev, Jonathan P. Marangos

Research output: Contribution to journalArticlepeer-review

29 Citations (Scopus)

Abstract

We present the results of experimental and theoretical studies of high-order harmonic generation (HHG) in plasmas containing fullerenes using pulses of different duration and wavelength. We find that the harmonic cutoff is extended in the case of few-cycle pulses (3.5 fs, 29th harmonic) compared to longer laser pulses (40 fs, 25th harmonic) at the same intensity. Our studies also include HHG in fullerenes using 1300 and 780 nm multicycle (35 and 40 fs) pulses. For 1300 nm pulses, an extension of the harmonic cutoff to the 41st order was obtained, with a decrease in conversion efficiency that is consistent with theoretical predictions based on wave packet spreading for single atoms. Theoretical calculations of fullerene harmonic spectra using the single active electron approximation were carried out for both few-cycle and multicycle pulses.
Original languageEnglish
Pages (from-to)7-12
Number of pages6
JournalJOURNAL OF THE OPTICAL SOCIETY OF AMERICA. B, OPTICAL PHYSICS
Volume30
Publication statusPublished - 2012

All Science Journal Classification (ASJC) codes

  • Statistical and Nonlinear Physics
  • Atomic and Molecular Physics, and Optics

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