Enhanced laser absorption from radiation pressure in intense laser plasma interactions
- Univ. of California, Irvine, CA (United States). Dept. of Physics and Astronomy
- Univ. of Michigan, Ann Arbor, MI (United States). Center for Ultrafast Optical Sciences
- Univ. of Michigan, Ann Arbor, MI (United States). Center for Ultrafast Optical Sciences; Lancaster Univ. (United Kingdom). Dept. of Physics
The reflectivity of a short-pulse laser at intensities of 2 x 1021Wcm-2 with ultra-high contrast (10-15) on sub-micrometer silicon nitride foilswas studied experimentally using varying polarizations and target thicknesses. Furthermore, the reflected intensity and beam quality were found to be relatively constant with respect to intensity for bulk targets. For submicron targets, the measured reflectivity drops substantially without a corresponding increase in transmission, indicating increased conversion of fundamental to other wavelengths and particle heating. The experimental results and trends we observed in 3D particle-in-cell simulations emphasize the critical role of ion motion due to radiation pressure on the absorption process. Ion motion during ultra-short pulses enhances the electron heating, which subsequently transfers more energy to the ions.
- Research Organization:
- Univ. of Michigan, Ann Arbor, MI (United States)
- Sponsoring Organization:
- USDOE National Nuclear Security Administration (NNSA)
- Grant/Contract Number:
- NA0002372; FA9550-12-1-0310; FA9550-14-1-0282; CHE-0840513
- OSTI ID:
- 1374977
- Journal Information:
- New Journal of Physics, Vol. 19, Issue 6; ISSN 1367-2630
- Publisher:
- IOP PublishingCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Efficient absorption of laser light by nano-porous materials with well-controlled structure
|
journal | March 2020 |
Similar Records
Ion Acceleration from the Interaction of Ultra-Intense Lasers with Solid Foils
Ion heating dynamics in solid buried layer targets irradiated by ultra-short intense laser pulses