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| Identifier |
000388292 |
| Title |
Δημιουργία και χαρακτηρισμός χαμηλής τάξεως αρμονικών με την χρήση της polarization gating τεχνικής |
| Alternative Title |
Production and characterization of low order harmonics generated by using the polarization-gating technique |
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Author
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Μαυρής, Αναστάσιος Κ.
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Thesis advisor
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Χαραλαμπίδης, Δημήτρης
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| Abstract |
The present text is the result of an experimental work that aimed the generation and characterization of low order harmonics. In the chapters that follow the basic theoretical background is presented as well as the experimental techniques that have been used. More specifically, in the first chapter the generation processes of low and high order harmonics are described. Then the role of ellipticity of the generating field is explored and a brief reference on how it applies to the creation of attosecond pulses is given. Afterwards a detailed description of the collinear many cycle-polarization gating device is given and how it can be used to produce shorter harmonic pulses. In the last two chapters the experimental setup that was built for the purpose of this work is described. Production and characterization areas are analyzed separately as well as all the devices that have been used. Finally the experimental data and the results of their analyses are presented.
Although the experimental setup was suffering from some drawbacks that have prevented the full achievement of the goal of this work, it gave some important results that deserve mentioning. The first one is the experimental confirmation that the ellipticity modulated pulse that exits the gating device has a broader spectrum than in the case when a linearly polarized generation pulse is used. So there is the possibility for a harmonic pulse with a smaller duration. The second one is the recording of the IR pulse that is an indication that the setup is working properly and can be used for an autocorrelation measurement. Finally quite interesting is the autocorrelation traces that have been recorded for the harmonic radiation that seem to give us the opportunity for a dynamic study of the molecule of toluene.
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| Language |
Greek |
| Subject |
Collinear many cycle polarization gating device |
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Generating field polarization effects |
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Harmonic generation |
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Second order intensity volume autocorrelation |
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Δεύτερης τάξης αυτοσυσχέτιση έντασης όγκου |
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Παραγωγή αρμονικών |
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Ρόλος της πόλωσης στην παραγωγή αρμονικών |
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Συγγραμική πολλών κύκλων polarization gating διάταξη |
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Χαμηλής τάξης αρμονικές |
| Issue date |
2014-11-21 |
| Collection
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School/Department--School of Sciences and Engineering--Department of Physics--Post-graduate theses
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Type of Work--Post-graduate theses
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| Views |
503 |
Δημιουργία και χαρακτηρισμός χαμηλής τάξεως αρμονικών με την χρήση της polarization gating τεχνικής
