Laser light absorption by a plasma with a very steep density gradient
Abstract
We investigated the behavior of reflectivity versus angle of incidence of a Cu target irradiated by 4-ps laser pulses at 1.06 μm. From the data taken at 1013-1014 W/cm2 we show that optical resonance takes place also in the presence of very steep density gradients of the order of ∼0.15 μm. The role of collisions is discussed and illustrated by measurements taken at lower fluxes.
- Publication:
-
Applied Physics Letters
- Pub Date:
- July 1980
- DOI:
- 10.1063/1.91687
- Bibcode:
- 1980ApPhL..37...23B
- Keywords:
-
- Laser Beams;
- Laser Plasma Interactions;
- Laser Targets;
- Optical Resonance;
- Photoabsorption;
- Spectral Reflectance;
- Ultrashort Pulsed Lasers;
- Copper;
- Density Distribution;
- Incident Radiation;
- Plasma Physics;
- 52.25.Ps;
- 52.40.Db;
- 52.20.Fs;
- 52.50.Jm;
- Electromagnetic radiation interactions with plasma;
- Electron collisions;
- Plasma production and heating by laser beams