Abstract
The level of second-harmonic light emitted from a laser-exploded foil plasma at nominal irradiance up to 3.10(13) W/cm2 was found to be extremely sensitive to both target position and irradiance on target. Either a small target displacement or a small increase in irradiance resulted in a jump of the 2omega level of more than three orders of magnitude. Correspondingly, a transition was observed from a 2omega source pattern clearly signed by the original laser spot pattern to unstable patterns of filaments whose size is consistent with the maximum growth of the instability.
Original language | English |
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Pages (from-to) | 175-180 |
Number of pages | 6 |
Journal | Europhysics Letters (EPL) |
Volume | 22 |
Publication status | Published - 1993 |