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- Title
Plasma enhancement of femtosecond laser-induced electromagnetic pulses at metal and dielectric surfaces.
- Authors
Varma, Sanjay; Spicer, Jane; Brawley, Benjamin; Miragliotta, Joseph
- Abstract
In a previous report, we have shown that the long wavelength, electromagnetic-pulsed (EMP) energy generated by ultrashort (38 fs) laser pulse ablation of a metal target is enhanced by an order of magnitude due to a preplasma generated by a different, 14-ns-long laser pulse. Here, we further investigate this EMP enhancement effect in a 2- to 16-GHz microwave region with different target materials and laser parameters. Specifically, we show a greater than two orders of magnitude enhancement to the EMP energy when the nanosecond and ultrashort laser pulses are coincident on a glass target, and greater than one order of magnitude enhancement when the pulses are coincident on a copper target.
- Subjects
ELECTROMAGNETIC pulses; ULTRASHORT laser pulse research; EFFECT of lasers on metals; LASER ablation; DIELECTRICS research; METALLIC surfaces
- Publication
Optical Engineering, 2014, Vol 53, Issue 5, p1
- ISSN
0091-3286
- Publication type
Article
- DOI
10.1117/1.OE.53.5.051515