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Surface-plasmon-enhanced MeV ions from femtosecond laser irradiated, periodically modulated surfaces.
- Source :
- Physics of Plasmas; Mar2012, Vol. 19 Issue 3, p030703, 4p, 1 Diagram, 3 Graphs
- Publication Year :
- 2012
-
Abstract
- Enhanced emission of high energy ions is measured from sub-wavelength metallic grating targets under irradiation by intense (1015-1016 W cm-2), p-polarized, 50 fs, 800 nm laser pulses. The maximum ion energy is 55% higher and the ion flux is 60% higher for the modulated surface in comparison with polished surfaces of the same atomic composition. The ion emission, a result of enhanced light coupling and hot electron production in the grating targets, is correlated with enhancement in hard x-ray bremsstrahlung emission. The results are well reproduced by particle-in-cell simulations. The study reveals that the enhanced laser coupling by surface plasmon excitation on metallic gratings is directly responsible for the enhancement of ion energies. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 1070664X
- Volume :
- 19
- Issue :
- 3
- Database :
- Complementary Index
- Journal :
- Physics of Plasmas
- Publication Type :
- Academic Journal
- Accession number :
- 73960686
- Full Text :
- https://doi.org/10.1063/1.3693388