Abstract
We attribute a strong forward directed THz emission from femtosecond laser filaments in air to a transition-Cherenkov emission from the plasma space charge moving behind the ionization front at light velocity. Distant targets can be easily irradiated by this new source of THz radiation.
| Original language | English |
|---|---|
| Article number | 235002 |
| Journal | Physical Review Letters |
| Volume | 98 |
| Issue number | 23 |
| DOIs | |
| Publication status | Published - 7 Jun 2007 |