Interplay between group-delay-dispersion-induced polarization gating and ionization to generate isolated attosecond pulses from multicycle lasers.
We implemented a new experimental scheme for the generation of single-shot extreme-UV continua that exploits a combination of transform-limited 15 fs, 800 nm pulses and chirped 35 fs, 800 nm pulses with orthogonal polarizations. Continua are interpreted as the formation of a single attosecond pulse and attributed to the interplay between polarization, ionization gating, and trajectory selection operated by suitable phase-matching conditions.
Altucci
Carlo
C
CNISM-Dipartimento di Scienze Fisiche, Università di Napoli Federico II, via Cintia, 26-Ed. 6-80126, Napoli, Italy. caltucci@unina.it
Velotta
Raffaele
R
Tosa
Valer
V
Villoresi
Paolo
P
Frassetto
Fabio
F
Poletto
Luca
L
Vozzi
Caterina
C
Calegari
Francesca
F
Negro
Matteo
M
De Silvestri
Sandro
S
Stagira
Salvatore
S