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Identifier 000364795
Title Φωτοδιάσπαση μορίων με την τεχνική του slice imaging
Alternative Title Photodissociation of molecules with slice imaging tecnique
Author Διαμαντοπούλου, Νίκη-Διονυσία Β.
Thesis advisor Κιτσόπουλος, Θεοφάνης
Αγγλος, Δημήτριος
Φαράντος, Σταύρος
Abstract In this thesis, coherent control of one-photon excitation in Rb using ultrashort laser pulses is discussed. By using polarization-shaping of a hundred femtosecond laser pulse it is possible to control the magnitude of angular momentum in excited state in rubidium. This is achieved by controlling excitation efficiencies to individual magnetic sub-levels of excited state in rubidium. It is shown, that angular momentum in excited state can be controlled by zero-angular momentum laser pulses, containing only linearly polarized spectral components. During a resonant two-photon excitation a net angular momentum can be transferred to rubidium atoms. However, even during a one-photon excitation angular momentum in excited state is changing in a nonintuitive way, and transiently can be controlled. In this thesis results of coherent control of the transient angular momentum during a resonant one-photon excitation are discussed. The experimental study was done using pump-probe technique and velocity map imaging. The rubidium was excited by a shaped laser pulse and ionized by a probe pulse. Using VMI technique the velocity distribution of the photoelectrons was measured to characterize the angular momentum in excited state in rubidium. In this thesis we present results on real-time observation of the changes of the wave-function induced by the angular momentum change during the onephoton excitation.
Language English
Subject Απεικόνιση ταχυτήτων
Issue date 2010-10-17
Collection   Faculty/Department--Faculty of Sciences and Engineering--Department of Chemistry--Post-graduate theses
  Type of Work--Post-graduate theses
Permanent Link https://elocus.lib.uoc.gr//dlib/4/e/4/metadata-dlib-2759baa5f91dc1d86576f8d9cb7a6250_1300437172.tkl Bookmark and Share
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