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RESEARCH PRODUCT
Generation of isolated attosecond pulses using unipolar and laser fields
Gianfranco OrlandoPietro Paolo CorsoEmilio FiordilinoF. Persicosubject
PhysicsSettore FIS/02 - Fisica Teorica Modelli E Metodi MatematiciField (physics)business.industryAttosecondGenerazione di attosecondiLaser pumpingLaserAtomic and Molecular Physics and OpticsSettore FIS/03 - Fisica Della MateriaPulse (physics)law.inventionIntensity (physics)laserWavelengthOpticslawbusinessEnvelope (waves)description
A new scheme to generate isolated attosecond pulses is presented that involves the use of a laser field and of a unipolar field. The laser field has a pulse of intensity I = 1.5×1014 W cm−2 and wavelength λ = 820 nm. The unipolar pulse is an asymmetric pulse consisting of a sharp peak, lasting approximately half a laser period, i.e. nearly 1.4 fs, followed by a long and shallow tail. We show that on combining these two fields, it is possible to generate isolated attosecond pulses as short as 1/10 of a laser period, i.e. approximately 270 as. Moreover, it is argued that this scheme is robust either against small variations of the laser envelope, or against small changes in the delay between the laser pump and the unipolar pulse.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2009-09-20 |