| Autor: |
Ganeev RA; Blackett Laboratory, Imperial College London, Prince Consort Road, London SW7 2AZ, UK. r.ganeev@imperial.ac.uk, Witting T, Hutchison C, Frank F, Tudorovskaya M, Lein M, Okell WA, Zaïr A, Marangos JP, Tisch JW |
| Jazyk: |
angličtina |
| Zdroj: |
Optics express [Opt Express] 2012 Nov 05; Vol. 20 (23), pp. 25239-48. |
| DOI: |
10.1364/OE.20.025239 |
| Abstrakt: |
We report studies of high-order harmonic generation in laser-produced manganese plasmas using sub-4-fs drive laser pulses. The measured spectra exhibit resonant enhancement of a small spectral region of about 2.5 eV width around the 31st harmonic (~50eV). The intensity contrast relative to the directly adjacent harmonics exceeds one order of magnitude. This finding is in sharp contrast to the results reported previously for multi-cycle laser pulses [Physical Review A 76, 023831 (2007)]. Theoretical modelling suggests that the enhanced harmonic emission forms an isolated sub-femtosecond pulse. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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