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Content archived on 2024-04-30

Generation of attosecond pulses in xuv range using high-order harmonic generation

Objective



Research objectives and content The objective of this project is the generation of attosecond pulses in XUV range. I propose to manipulate the ultra-short laser l pulse polarisation to produce attosecond pulses. The high harmonic emission has a strong dependence on the polarisation of the l fundamental light and harmonics are effectively generated only when the laser is linearly-polarised. In order to obtain a linearly l polarised pulse during a laser cycle, different techniques are suggested as the use of an Optical Parametric Amplifier or l birefringent materials associated with chirped pulses. I plan to explore several of these possibilities. The measurement of the l duration of attosecond pulses is required to characterize the XUV emission and optimize its intensity. The method to measure l the pulse-width will be studied and tested. One possibility is based on a correlation technique between two pulses. We measure the number of electrons produced by absorption of two photons, one from each pulse, as a function of the relative time delay between the pulses. At first we explore this technique. The issue of this project is important for the atomic physic. The attosecond scale is that of the electronic motion in atoms and molecules. This could be a new way to explore atoms and molecules. Training content (objective, benefit and expected impact) The physics of atoms in strong laser fields is a new domain for me and this project is an excellent opportunity for me to gain a training in a new research field. During my thesis work, I have built up an ultra-short high-power laser, now I want to use this type of lasers to do research. Furthermore the creating contacts with the Atomic Physics division in Lund will be benefit in my next planing research in a French laboratory. Links with industry / industrial relevance (22)

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Funding Scheme

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Coordinator

Aristotle University of Thessaloniki
EU contribution
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Address
Analytical Chemistry Lab
54006 Thessaloniki
Greece

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Total cost

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