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- W1717712082 abstract "The continuous development and improvement of laser sources has steadily increasedthe number of applications and pushed the limit of high precision measurementsin various fields. The goal of the work presented in this thesis is to improve thespectrally broadened Ti:sapphire laser system used for isolated extreme ultraviolet(XUV) pulse generation, which has, in the last decade, allowed the study of electrondynamics on a sub-femtosecond (1 fs = 10^-15 s) level and delivered new insights intoultrafast dynamics of electrons in atoms, molecules and solids.By adding a second stage amplifier to the commonly used one-stage chirped pulseamplification laser system the compressed output power of a sub-5 fs laser systemhas been tripled to 1.5 mJ. A crucial part for achieving this result is the comparisonof two different efficient compressor setups in order to optimize the compression.With these higher pulse energies, it is possible to increase the generated photon uxin an isolated attosecond (10^-18 s) pulse and to push the XUV photon energy higher.Run at 4 kHz repetition rate, integrative measurements with sub-2 cycle laser pulsescan be conducted much faster than with most laser sources in this energy range.The resulting pulses are used for high-harmonic generation (HHG) and characterizedvia attosecond streaking, demonstrating excellent stability and quality of thewhole laser system.First experiments with these pulses were conducted by probing the temporal behaviorof the photo-emission of the giant resonance of 4d electrons in xenon with broadbandXUV-pulses at 100 eV and inducing and measuring the nonlinear propagationin fused silica at high intensities via its effect on the waveform of the ultra-shortvisible-near-infrared pulse measured by means of attosecond streaking.The higher pulse energy of the driving laser field will also prove to be very useful assoon as nonlinear effects besides HHG contribute to the pump and probe setup e.g.an ultrashort UV-pulse is used to pump electron dynamics which are subsequentlyprobed with high temporal resolution by the XUV-pulse." @default.
- W1717712082 created "2016-06-24" @default.
- W1717712082 creator A5021752790 @default.
- W1717712082 date "2014-10-23" @default.
- W1717712082 modified "2023-09-27" @default.
- W1717712082 title "A laser source for the generation of intense attosecond pulses and its first applications" @default.
- W1717712082 hasPublicationYear "2014" @default.
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