Harmonic generation in plasmas of different density gradients

✍ Scribed by I.B. Földes; J.S. Bakos; Z. Bakonyi; T. Nagy; S. Szatmári

• Book ID: 104337549
• Publisher: Elsevier Science
• Year: 1999
• Tongue: English
• Weight: 101 KB
• Volume: 258
• Category: Article
• ISSN: 0375-9601
• DOI: 10.1016/s0375-9601(99)00376-x

✦ Synopsis

The effect of plasma scalelength on second and third harmonic generation in the interaction of a 700 fs, 248 nm laser pulse with solid targets was studied at nonrelativistic intensities. The density gradient was modified by a 700 fs prepulse 0-40 ps prior to the main pulse. The appropriately chosen prepulse leads to enhanced conversion to harmonics which is interpreted as a consequence of resonant absorption. There are differences in the effect of the prepulse for different materials and for different harmonic orders, which might open the possibility of selective harmonic generation.