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Identifier

000379461

Title

Study of the High Harmonic Generation in Xe-gas through control of the polarization of two time-delayed femtosecond laser pulses

Alternative Title

Μελέτη παραγωγής υψηλών αρμονικών σε Xe-gas μέσω του ελέγχου της απόδοσης δύο χρονοκαθυστερούμενων femtosecond παλμών laser

Thesis advisor

Πετράκης, Στυλιανός

Thesis advisor

Χαραλαμπίδης, Δημήτριος

Abstract

High-harmonic generation (HHG) provides a powerful source of ultrashort coherent radiation in the eXtreme UltraViolet (XUV) and soft-X-ray range and is the main research field in ultrafast science. Generally, when a non-linear medium is exposed to femtosecond laser radiation with intensities ≥10¹⁴ Wcm^-2 the atoms are ionized and the freed electrons are accelerated by the laser field in the presence of the core potential. A small number of these electrons may recombine with the parent ions emitting the gained energy. This thesis reports on the experimental research in HHG. The purpose is to control the HHG efficiency through two time-delayed femtosecond pulses of 800nm center wavelength having different polarization, thus providing control of E-field ellipticity which results in the control of the electron trajectories, and ultimately of the photon flux of specific HH orders.

Language

English

Issue date

2013-07-19

Collection

School/Department--School of Sciences and Engineering--Department of Physics--Post-graduate theses

Type of Work--Post-graduate theses

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614

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