Towards intense single attosecond pulse generation from a 400 NM driving laser

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Show simple item record Cheng, Yan 2011-11-30T18:24:18Z 2011-11-30T18:24:18Z 2011-11-30
dc.description.abstract Attosecond pulse generation is a powerful tool to study electron dynamics in atoms and molecules. However, application of attosecond pulses is limited by the low photon flux of attosecond sources. Theoretical models predict that the harmonic efficiency scales as λ[lambda]-6 in the plateau region of the HHG spectrum, where λ [lambda] is the wavelength of the driving laser. This indicates the possibility of generating more intense attosecond pulses using short wavelength driving lasers. The purpose of this work is to find a method to generate intense single attosecond pulses using a 400 nm driving laser. In our experiments, 400 nm femtosecond laser pulses are used to generate high harmonics. First, the dependence of the high harmonic generation yield on the ellipticity of 400 nm driving laser pulse is studied experimentally, and it is compared with that of 800 nm driving lasers. A semi-classical theory is developed to explain the ellipticity dependence where the theoretical calculations match experiment results very well. Next, 400 nm short pulses (sub-10 fs) are produced with a hollow core fiber and chirped mirrors. Finally, we propose a scheme to extract single attosecond pulses with the Generalized Double Optical Gating (GDOG) method. en_US
dc.language.iso en_US en_US
dc.publisher Kansas State University en
dc.subject Attosecond en_US
dc.subject High harmonic generation en_US
dc.title Towards intense single attosecond pulse generation from a 400 NM driving laser en_US
dc.type Thesis en_US Master of Science en_US
dc.description.level Masters en_US
dc.description.department Department of Physics en_US
dc.description.advisor Brian Washburn en_US
dc.description.advisor Zenghu Chang en_US
dc.subject.umi Physics (0605) en_US 2011 en_US December en_US

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