Journal
OPTICS EXPRESS
Volume 16, Issue 17, Pages 12650-12657Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.16.012650
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Funding
- KAKENHI
- Control of Molecules in Intense Laser Fields [419, 14077202]
- Strong Photon-Molecule Coupling Fields [470, 20043002]
- Ministry of Education, Culture, Sports, Science and Technology of Japan
- Ministry of Education, Science, Sports, and Culture of Japan [19360322]
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The chirp effect on a X-ray emission intensity from a CsCl aqueous solution jet irradiated by femtosecond pulses was systematically studied. The p-polarized chirped pulses were more efficient as compared with the shortest pulses determined by the spectral bandwidth. The negatively-chirped pulses of approximately 240 fs duration produced up to 10 times larger X-ray intensity as compared with the transform-limited 160 fs pulses. The angular dependence of X-ray generation can be explained by the resonant absorption. Numerical simulations of electron density evolution due to the avalanche and multi-photon absorption supports qualitatively well the experimental observations. (c) 2008 Optical Society of America.
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