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Relevant bibliographies by topics / Structure; Ion-beam/laser-beam spectroscopy / Dissertations / Theses

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Dissertations / Theses on the topic 'Structure; Ion-beam/laser-beam spectroscopy'

Author: Grafiati

Published: 4 June 2021

Last updated: 11 February 2022

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1

Shiell, Ralph C. "Experimental investigations of doubly charged atomic and molecular species." Thesis, University of Newcastle Upon Tyne, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.294869.

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2

Heijkenskjöld, Filip. "Experimental Techniques for Studies in Atomic & Molecular Physics." Doctoral thesis, Uppsala University, Department of Physics and Materials Science, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-9295.

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<p>This thesis is based on a selection of six different experimental techniques used for studies in atomic and molecular physics. The techniques analysed in the thesis are compared to find similarities in strategies and ways to avoid sources of error.</p><p>Paper 1 deals with collision based spectroscopy with 60 keV Xe6+ ions on sodium and argon gas targets. Information on energy of Rydberg states in Xe5+ is unveiled by optical spectroscopy in the wavelength range from vacuum ultraviolet (VUV) to visible. In paper 2, the fast ion-beam laser spectroscopy (FIBLAS) is adapted for measuring hyperf

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3

Jeandet, Antoine. "Spatio-temporal characterization of femtosecond laser pulses using self-referenced Fourier transform spectroscopy Spatio-temporal structure of a petawatt femtosecond laser beam Controlling the velocity of a femtosecond laser pulse using refractive lenses." Thesis, université Paris-Saclay, 2020. http://www.theses.fr/2020UPASS089.

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La technologie actuelle des lasers ultrabrefs permet de délivrer des impulsions d'une énergie de quelques dizaines de joules dont la durée est de l'ordre de la dizaine de femtosecondes. Focaliser fortement de telles impulsions permet d'obtenir des valeurs d'éclairement considérables, qui sont notamment utilisées pour générer des faisceaux de particules relativistes. Le bon fonctionnement des lasers de ultra-haute intensité nécessite un excellent contrôle des propriétés du faisceau en tout point de la chaîne d'amplification. Développer un tel niveau de contrôle exige de pouvoir mesurer les impe

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4

Seamons, Scott Andrew. "The collision dynamics of OH(A)+H2." Thesis, University of Oxford, 2015. http://ora.ox.ac.uk/objects/uuid:36319557-1efa-4840-8f46-c15479945a0c.

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This thesis presents a joint experimental and theoretical study of a bimolecular collision between OH(A) and H<sub>2</sub> diatoms. The study focuses on the relationship between the initial, <b><i>j</i></b>, and final rotational angular momentum, <b><i>j'</i></b>. This relationship is explored from both a scalar point of view by measuring rotational energy transfer (RET), and a vectorial viewpoint by considering the collisional depolarisation. The experimental technique used in this investigation, Zeeman quantum beat spectroscopy, is first demonstrated by applying it to the determination of th

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5

Nikzad, Shouleh Tombrello Thomas A. Tombrello Thomas A. "A study of ion beam sputtering of compound materials with laser spectroscopy\ /." Diss., Pasadena, Calif. : California Institute of Technology, 1990. http://resolver.caltech.edu/CaltechETD:etd-03022007-090722.

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6

Back, Tekla. "Laser spectroscopy of highly charged ions using an electronic beam ion trap." Thesis, University of Oxford, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.711594.

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7

Henninger, Katharine Rose. "In-beam spectroscopy of ⁷²Ge." Thesis, Rhodes University, 2012. http://hdl.handle.net/10962/d1018233.

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The high-spin states of the nucleus ⁷²Ge were populated via the ⁷°Zn(a,2n)⁷²Ge fusion-evaporation reaction at a beam-energy of 30 MeV. The ')'-decays were observed with the AFRODITE spectrometer array at iThemba LABS (Faure, South Africa). Twenty-seven new transitions, 18 new levels and 2 new bands were added to the ⁷²Ge level scheme, and several corrections were made to t he previously-known level scheme. Transitions were characterised using Directional Correlation from Oriented states (DCO) and polarisation measurements, and spin-parity assignments were made for 7 new levels. Spin and parity

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8

Crosby, David N. "Visible and laser spectroscopy of highly charged ions in an electron beam ion trap." Thesis, University of Oxford, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.491358.

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This thesis describes the development of visible and laser spectroscopy techniques for highly charged ions produced in an electron beam ion trap (EBIT). Visible spectroscopy measurements are reported of the 5D3 _5 D2 transition in titaniumlike Ag25+ and Sn28+, yielding results of 6314.81(4) Aand 4981.89(6) Arespectively. These are the most accurate measurements yet made in this system. Furthermore, the work points the way to extending the techniques t9 shorter wavelengths, in particular the vacuum ultraviolet, wherein significant improvements in the measurement of the QED sensitive ls2s 3So -

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9

Gaarde-Widdowson, Kristina. "Laser spectroscopy of medium-Z hydrogenic ions in the Oxford Electron Beam Ion Trap (EBIT)." Thesis, University of Oxford, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.496894.

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10

Groves, Paul David. "A study of the 2S Lamb shift of one-electron ions in an electron beam ion trap." Thesis, University of Oxford, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.337827.

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11

Heidarian, Negar. "A Homologous Study of Lifetimes and Oscillator Strengths of Ultraviolet Transitions in Singly Ionized Lead, Tin, and Germanium." University of Toledo / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1500466694480909.

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12

Abed, Samir. "Etude des spectres de photoprédissociation de N²O+ obtenus par la méthode FIBLAS (Fast Ion Beam Laser Spectroscopy)." Lyon 1, 1985. http://www.theses.fr/1985LYO19025.

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Etude complete des spectres de photopredissociation de n::(2)o**(+) correspondant au systeme a**(2)epsilon **(+)-x**(2)pi en uv proche par la methode fiblas (interaction d'un faisceau laser avec un faisceau d'ions acceleres et mesure du courant des photofragments de predissociation). Observation de structures rovibroniques completement resolues, associees a une importance structure hyperfine, due au terme du contact de fermi du noyau n externe. Presence d'une autre interaction hyperfine agissant sur les composantes du dedoublement de type l du niveau vibronique (11**(1)o) **(2)pi de l'etat a**

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13

Lioubimov, Vladimir. "Precision absolute frequency laser spectroscopy of argon II in parallel and antiparallel geometry using a frequency comb for calibration." [College Station, Tex. : Texas A&M University, 2008. http://hdl.handle.net/1969.1/ETD-TAMU-2008-12-147.

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14

Shan, Ambalanath. "Expanded Beam Spectroscopic Ellipsometer for High Speed Mapping of PhotovoltaicMaterials." University of Toledo / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1493306189501021.

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15

Lagaki, Varvara [Verfasser], Lutz [Gutachter] Schweikhard, and Gerald [Gutachter] Gwinner. "Development of an Electrostatic Ion Beam Trap for Laser Spectroscopy of Short-lived Radionuclides / Varvara Lagaki ; Gutachter: Lutz Schweikhard, Gerald Gwinner." Greifswald : Universität Greifswald, 2021. http://d-nb.info/1235139875/34.

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16

Davie, Raoul Francis. "Spectroscopic study of ⁸⁰Sr." Thesis, University of Oxford, 1986. http://ora.ox.ac.uk/objects/uuid:3260ca5a-a210-4732-a84f-378d59e7cb70.

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High spin states in <sup>80</sup>Sr have been studied using the techniques of in-beam γ-ray spectroscopy. The reaction used was <sup>54</sup>Fe(<sup>29</sup>Si, 2pn)<sup>80</sup>Sr at beam energies between 85 and 110 MeV. γ-γ coincidence measurements were performed with a thin target to investigate the level structure. Both neutron gated and singles angular distribution measurements were carried out to aid in the assignment of level spins. The directional correlation ratios extracted from the γ-γ coincidence data provided a consistency check for the spin assignments. Level lifetimes were measu

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17

Day, Goodacre Thomas. "Developments of the ISOLDE RILIS for radioactive ion beam production and the results of their application in the study of exotic mercury isotopes." Thesis, University of Manchester, 2017. https://www.research.manchester.ac.uk/portal/en/theses/developments-of-the-isolde-rilis-for-radioactive-ion-beam-production-and-the-results-of-their-application-in-the-study-of-exotic-mercury-isotopes(02c79aff-86c7-4eaf-8701-f70c0ccdcdd4).html.

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This work centres around development and applications of the Resonance Ionization Laser Ion Source (RILIS) of the ISOLDE radioactive ion beam facility based at CERN. The RILIS applies step-wise resonance photo-ionization, to achieve an unparalleled degree of element selectivity, without compromising on ion source efficiency. Because of this, it has become the most commonly used ion source at ISOLDE, operating for up to 75% of ISOLDE experiments. In addition to its normal application as an ion source, the RILIS can be exploited as a spectroscopic tool for the study of nuclear ground state and i

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18

Fox, Michael. "Statistical structure of plasma turbulence from BES measurements in MAST and the effect of flow shear." Thesis, University of Oxford, 2016. https://ora.ox.ac.uk/objects/uuid:9d109810-79e7-4403-bb4c-f58b7acbd6c1.

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The suppression of turbulent transport is a key requirement for enabling nuclear fusion to become a viable energy source. One possible route to achieving this suppression is through toroidal flow shear. We investigate the effect that flow shear has on the structure of turbulence by analysing data from both measurements of the fluctuating intensity field using the Beam-Emission-Spectroscopy (BES) diagnostic on the spherical tokamak MAST, as well as from numerical simulations of the fluctuating density field in MAST. We develop a procedure to map from the correlation parameters of the intensity

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19

Olivier, Louis. "Nuclear structure in the vicinity of ⁷⁸Ni : in-beam gamma-ray spectroscopy of ⁷⁹Cu through proton knockout." Thesis, Université Paris-Saclay (ComUE), 2017. http://www.theses.fr/2017SACLS212/document.

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La structure nucléaire en couches évolue en allant vers des régions de plus en plus exotiques de la carte des noyaux, et par conséquent, les nombres magiques conventionnels (8, 20, 28, 50, 82, 126) peuvent disparaître loin de la stabilité, tandis que de nouveaux nombres magiques peuvent apparaître. Le noyau de ⁷⁸Ni, avec 28 protons et 50 neutrons, est un des noyaux supposés doublement magiques les plus exotiques et est donc d'un grand intérêt. L'évolution de la fermeture de couche à Z = 28 en allant vers N = 50 peut être étudiée en sondant le caractère de particule individuelle des niveaux dan

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20

Sparenberg, Mino. "Controlled molecular beam deposition of hybrid inorganic/organic semiconductor structures." Doctoral thesis, Humboldt-Universität zu Berlin, 2018. http://dx.doi.org/10.18452/19239.

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Zentrales Thema dieser Dissertation ist die Untersuchung anorganisch/organischer Hybridsysteme (HIOS) mit besonderem Fokus auf den speziellen Prozessen an der Grenzfläche beider Materialklassen. Organische Moleküle, in Verbindung mit anorganischen Halbleitern haben ein großes Potenzial für Anwendungen in zukünftigen optoelektronischen Hybridbauteilen, indem sie Vorteile zweier unterschiedlicher Welten kombinieren. Entscheidend für die Herstellung von hybriden Strukturen ist das Verständnis der Wechselwirkungen an der Grenzfläche zwischen organischem und anorganischem Material. In dieser Arbeit

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21

Pereira, López Xesús. "Study of transfer reactions induced by a 16C beam." Caen, 2016. http://www.theses.fr/2016CAEN2065.

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A disparition du nombre magique N=20 et l'apparition des nouveaux nombres magiques N=14 et 16 ont été observées dans les isotopes d'oxygène riches en neutrons. L'objectif de ce travail est d'étudier la présence éventuelle de ces nouveaux nombres magiques dans les isotopes de carbone riches en neutrons en localisant les orbitales de neutron 0d5/2 1s1/2 et 0d3/2 dans le 17C à l'aide de la réaction de transfert 16C(d,p)17C. Dans notre expérience réalisée au GANIL, les états du 17C ont été peuplés par la réaction de transfert 16C(d,p)17C induite en bombardant une cible de CD2 avec un faisceau de 1

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22

Desrues, Antoine. "Matériaux composites Si@C nanostructurés pour anodes de batterie Li-ion à haute densité d’énergie. Relations entre structure/morphologie et mécanismes de dégradation." Thesis, Université Paris-Saclay (ComUE), 2019. http://www.theses.fr/2019SACLS279.

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Un des enjeux de la transition énergétique est de disposer de systèmes de stockage denses en énergie, abordables, et conservant une bonne capacité pendant de nombreux cycles, afin d’aider à la décarbonation des transports. A l’anode des systèmes Li-ion, le silicium (Si) est un bon candidat pour le remplacement du graphite commercial grâce à sa capacité 10 fois plus élevée. Les mécanismes de dégradation du Si empêchent le déploiement à grande échelle. L’objectif de ce travail est d’optimiser les caractéristiques des matériaux pour la réalisation d’anodes performantes. Deux voies d’optimisation

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23

Winter, Benjamin. "Novel methods in imaging mass spectrometry and ion time-of-flight detection." Thesis, University of Oxford, 2014. http://ora.ox.ac.uk/objects/uuid:43db5039-0490-4f97-8519-4d3ed4e30ca3.

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Imaging mass spectrometry (IMS) in microscope mode allows the spatially resolved molecular constitution of a large sample section to be analysed in a single experiment. If performed in a linear mass spectrometer, the applicability of microscope IMS is limited by a number of factors: the low mass resolving power of the employed ion optics; the time resolution afforded by the scintillator screen based particle detector and the multi-hit capability, per pixel, of the employed imaging sensor. To overcome these limitations, this thesis concerns the construction of an advanced ion optic employing a

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24

Hernandez, Alba Oscar. "Mecanisme de fragmentation des peptides en spectrométrie de masse : couplages de techniques de caractérisation structurale." Thesis, Paris 11, 2014. http://www.theses.fr/2014PA112421/document.

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La spectrométrie de masse tandem est une technique analytique versatile, notamment utilisée dans le champ de la protéomique pour dériver la séquence de peptides. Cette thèse vise à contribuer au développement de méthodes intégrées à la spectrométrie de masse afin d’apporter des informations structurales sur les ions moléculaires, intermédiaires réactionnels ou produits de réactions. La fragmentation des peptides protonés est induite par collisions avec une gaz rare (CID). Des multiples fragments sont observés et la séquence peptidique peut être dérivée de la mesure de la masse de séries d’ions

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25

Oldham, James Martin. "Combination of a cold ion and cold molecular source." Thesis, University of Oxford, 2014. http://ora.ox.ac.uk/objects/uuid:ef33adcb-609a-4329-b4d8-aca8a1c48661.

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This thesis describes the combination of two sources of cold atomic or molecular species which can be used to study a wide range of ion-molecule reactions. The challenges in forming these species and in determining the fate of reactive events are explored throughout. Reactions occur in a volume within a radio-frequency ion trap, in which ions have previously been cooled to sub-Kelvin temperatures. Ions are laser-cooled, with migration of ions slowed sufficiently to form a quasi-crystalline spheroidal structure, deemed a Coulomb crystal. Fluorescence emitted as a consequence of laser-cooling is

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26

Kolos, Karolina. "Probing the nuclear structure in the vicinity of 78Ni via beta decay spectroscopy of 84Ga." Thesis, Paris 11, 2012. http://www.theses.fr/2012PA112201/document.

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Grâce aux progrès de la production de faisceaux radioactifs au cours de deux dernières décennies, nous sommes à présent capables d'étudier les systèmes nucléaires très loin de la vallée de stabilité. La région de 78Ni reste encore inexplorée. Cette région, avec de très riches en neutrons 78Ni, noyau encore inconnu supposé doublement magique, est très intéressante en termes de structure nucléaire. En effet, les informations expérimentales obtenues sur l’espace de valence ouvert au dessus de 78Ni, nous permettront de construire des interactions effectives pour cette région. Nous avons étudié la

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27

MIRIM, DENILSON de C. "Desenvolvimento de processos de microusinagem com laser de pulsos ultracurtos." reponame:Repositório Institucional do IPEN, 2016. http://repositorio.ipen.br:8080/xmlui/handle/123456789/26830.

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Submitted by Claudinei Pracidelli (cpracide@ipen.br) on 2016-11-11T17:33:21Z No. of bitstreams: 0<br>Made available in DSpace on 2016-11-11T17:33:21Z (GMT). No. of bitstreams: 0<br>O desenvolvimento de sistemas laser com pulsos ultracurtos trouxe a possibilidade de usinagem de estruturas muito pequenas em praticamente qualquer tipo de material. Neste trabalho foi dada continuidade a estudos já iniciados no Centro de Lasers e Aplicações (CLA) com os materiais dielétricos, introduzindo a largura temporal dos pulsos laser como mais uma variável e utilizando os conhecimentos adquiridos para a dete

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28

Mokhtari, Hossein. "Transmission electron microscopy of defects and internal fields in GaN structures." Thesis, University of Bristol, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.368206.

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29

Boyrie, Fabrice. "Modélisations pour l'analyse de la structure et de la réactivité d'organométalliques en phase gazeuse." Phd thesis, Université Paris Sud - Paris XI, 2005. http://tel.archives-ouvertes.fr/tel-00117007.

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Deux modèles sont développés afin d'interpréter la physico-chimie des ions organométalliques en phase gazeuse.<br /><br /> Les surfaces de potentiel associées à la réactivité sont modélisées dans le cadre de la théorie des hamiltoniens effectifs, et l'on s'intéresse plus particulièrement à l'addition oxydante d'un ion LnM+ sur une liaison H-H. L'idée est de bâtir un hamiltonien effectif associé aux électrons actifs, c'est-à-dire à l'insertion de M+ dans la liaison H-H, puis d'utiliser une approche de type champ de ligands pour traiter l'effet des ligands spectateurs (Ln). L'originalité de l'ap

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30

Camy, Georges. "Sources laser ultrastables en spectroscopie de saturation : réalisation d'étalons optiques de fréquence et caractérisation de leurs qualités." Paris 13, 1985. http://www.theses.fr/1985PA132009.

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On montre que la stabilisation en fréquence des lasers à argon ionisé sur des transitions de la molécule d'iode détectées par spéctrométrie de saturation permet de réaliser des étalons de fréquence de très hautes performances dans le domaine optique. Imbrication de recherches spectroscopiques et métrologiques telles que : étude de laser à argon ionisé, structure hyperfine de la molecule I(2), spéctromètre de saturation à décalage de fréquence, profil d'absorption de la vapeur d'iode, spéctrométrie de saturation hétérodyne à haute fréquence

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31

Gérard, Lionel. "Structures de semiconducteurs II-VI à alignements de bande de type II pour le photovoltaïque." Thesis, Grenoble, 2013. http://www.theses.fr/2013GRENY070.

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Ce travail porte sur l'étude d'hétérostructures de semiconducteurs II-VI à alignements de bande de type II, en particulier sous forme de superréseaux. Il s'agit d'un système qui peut être prometteur pour une application photovoltaïque, et c'est dans cette optique qu'est orienté ce travail. Une première partie traite ainsi d'une réflexion conceptuelle sur l'apport des interfaces de type II au photovoltaïque.Nous présentons ensuite une étude sur la croissance de CdSe et ZnTe par épitaxie par jets moléculaires, sur différents substrats. Ces matériaux sont particulièrement intéressants et adaptés

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32

Slater, Craig Stephen. "Studies of photoinduced molecular dynamics using a fast imaging sensor." Thesis, University of Oxford, 2013. http://ora.ox.ac.uk/objects/uuid:24b6edce-9bd0-4729-97d6-4de959618cb0.

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Few experimental techniques have found such a diverse range of applications as has ion imaging. The field of chemical dynamics is constantly advancing, and new applications of ion imaging are being realised with increasing frequency. This thesis is concerned with the application of a fast pixelated imaging sensor, the Pixel Imaging Mass Spectrometry (PImMS) camera, to ion imaging applications. The experimental possibilities of such a marriage are exceptionally broad in scope, and this thesis is concerned with the development of a selection of velocity-map imaging applications within the field

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33

Nunez, Eroles Marc. "Nanogravure et caractérisation structurale et électronique de rubans de graphène cristallins." Thesis, Toulouse 3, 2015. http://www.theses.fr/2015TOU30201/document.

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Les principaux objectifs de cette thèse sont la fabrication et la caractérisation structurale à haute résolution de nanorubans de graphène à bords atomiquement lisses ainsi que leur intégration dans des composants et l'étude du transport électronique. En premier lieu, nous montrons que des nanorubans de graphène cristallins de largeur inférieure à 100 nm et avec des qualités structurales supérieures l'état de l'art peuvent être découpé par un faisceau électronique focalisé d'énergie modérée en présence d'oxygène. Les caractéristiques des rubans obtenus sont également supérieures à l'approche p

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34

Boissinot, Simon. "Structure et spectroscopie du noyau exotique d'oxygène 24 par diffusions élastique et inélastiques de proton avec les détecteurs MUST2 à RIKEN." Phd thesis, Université Paris Sud - Paris XI, 2013. http://tel.archives-ouvertes.fr/tel-00958441.

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Les études de structure et de spectroscopie réalisées sur les noyaux radioactifs durant les trois dernières décennies ont montré que la structure en couches des noyaux évolue vers la drip-line et que de nouveaux nombres magiques peuvent apparaître. Les noyaux doublement magiques sont très rares mais ils représentent des tests très contraignants pour les théories et leur modélisation de l'interaction nucléaire.Dans ce contexte, nous avons étudié la structure et la spectroscopie du noyau doublement magique d'oxygène 24, situé à la drip-line neutron, via la diffusion élastique et inélastiques de

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35

Gonzalez, Walter G. "Protein-Ligand Interactions and Allosteric Regulation of Activity in DREAM Protein." FIU Digital Commons, 2016. http://digitalcommons.fiu.edu/etd/2503.

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Downstream regulatory antagonist modulator (DREAM) is a calcium sensing protein that co-assembles with KV4 potassium channels to regulate ion currents as well as with DNA in the nucleus, where it regulates gene expression. The interaction of DREAM with A-type KV4 channels and DNA has been shown to regulate neuronal signaling, pain sensing, and memory retention. The role of DREAM in modulation of pain, onset of Alzheimer’s disease, and cardiac pacemaking has set this protein as a novel therapeutic target. Moreover, previous results have shown a Ca2+ dependent interaction between DREAM and KV4/D

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36

Baghalian, Amin. "Detecting Structural Defects Using Novel Smart Sensory and Sensor-less Approaches." FIU Digital Commons, 2017. https://digitalcommons.fiu.edu/etd/3560.

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Monitoring the mechanical integrity of critical structures is extremely important, as mechanical defects can potentially have adverse impacts on their safe operability throughout their service life. Structural defects can be detected by using active structural health monitoring (SHM) approaches, in which a given structure is excited with harmonic mechanical waves generated by actuators. The response of the structure is then collected using sensor(s) and is analyzed for possible defects, with various active SHM approaches available for analyzing the response of a structure to single- or multi-f

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37

Dal'Bo, Frédéric. "Spectroscopie optique d'heterostructures a base de tellurure de cadmium epitaxiees par jets moleculaires." Grenoble 1, 1988. http://www.theses.fr/1988GRE10123.

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La relaxation des contraintes est mise en evidence par une etude spectroscopique des transitions des excitons libres et varie en fonction de l'epaisseur de la couche et de l'orientation du support. Les differences entre les spectres de photoluminescence des materiaux massifs et ceux des couches epitaxiees sont dues aux effets des contraintes, aux defauts cristallins et aux impuretes introduites pendant la croissance. La structure de bande du puits quantique contraint est etudiee par spectroscopie optique. Elle est etudiee en fonction de l'epaisseur du puits

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38

Karr, Jean-Philippe. "Optique quantique dans les microcavités semi-conductrices. Spectroscopie de l'ion moléculaire H2+." Habilitation à diriger des recherches, Université d'Evry-Val d'Essonne, 2008. http://tel.archives-ouvertes.fr/tel-00347825.

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Je présente dans une première partie mes travaux de recherche sur les microcavités semi-conductrices en régime de couplage fort exciton-photon. Les modes propres dans ces systèmes sont des états mixtes exciton-photon appelés polaritons de cavité, qui présentent de fortes non-linéarités optiques provenant de l'interaction exciton-exciton. Je présente plusieurs applications de ces dispositifs dans les domaines de l'optique quantique (compression du bruit quantique, génération de faisceaux corrélés) des communications optiques et de l'opto-électronique de spin.<br /><br />J'aborde dans la deuxièm

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Haidu, Francisc. "Tailoring the Electronic and Optical Properties of Molecular Thin Films by Reducing and Oxidising Agents." Doctoral thesis, Universitätsbibliothek Chemnitz, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-159012.

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Heutzutage wächst die Nachfrage nach neuartigen Geräten, die teilweise (hybrid) oder völlig aus organischen halbleitenden Materialien hergestellt sind. Der Grund dafür sind die geringen Herstellungskosten sowie die hohe Flexibilität im Moleküldesign und damit einstellbare optische, elektronische und Spintronik-Eigenschaften. Bisher sind mit großem Erfolg organische Leuchtdioden (OLED), organische Solarzellen und gedruckte organische Elektronik-Bauelemente hergestellt worden. Auf Grund ihrer langen Spin-Lebensdauer sind Moleküle auch für Spintronik-Anwendungen sehr geeignet. In dieser Arbeit wu

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Aubel, Dominique. "Apport des techniques de photoémission à la connaissance des hétérostructures Ge/Si(001), Si/Ge(001), Si1-xGex/Si(001) et Si1-xGex/Ge(001)." Mulhouse, 1995. http://www.theses.fr/1995MULH0412.

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Les premières phases de la croissance à température ambiante (TA) et 400°C des deux hétérostructures Si/Ge(001) et Ge/Si(001) ont été étudiées par des techniques de surface comme la spectroscopie de photoélectrons X(XPS) et UV(UPS) et la diffraction d'électrons lents (LEED). Un effort particulier a été fait pour développer la dernière née des méthodes d'investigations structurales dérivée de l'XPS à savoir la diffraction de photoélectrons X(XPD). L'analyse fine de l'émergence des signatures XFD et la mesure des contrastes sur les pics de diffusion vers l'avant en fonction du recouvrement, appo

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Teigelhöfer, Andrea. "Isotope shift and hyperfine structure measurements on silver, actinium and astatine by in-source resonant ionization laser spectroscopy." 2017. http://hdl.handle.net/1993/32217.

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Resonant ionization laser ion sources are applied worldwide to increase purity and intensity of rare isotopes at radioactive ion beam facilities. Especially for heavy elements the laser wavelengths required for efficient resonant laser ionization are not only element dependent, but also vary to small degrees from isotope to isotope. Since the first operation of an actinide target at ISAC-TRIUMF in 2008, the demand for neutron-rich isotopes far away from stability has steadily increased. Those isotopes often have very low production rates so that often only a few ions per second are released. I

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Müller, Georg Alexander. "Ion-beam induced changes of magnetic and structural properties in thin Fe films." Doctoral thesis, 2004. http://hdl.handle.net/11858/00-1735-0000-0006-B4EE-3.

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Nikzad, Shouleh. "A study of ion beam sputtering of compound materials with laser spectroscopy." Thesis, 1990. https://thesis.library.caltech.edu/841/1/Nikzad_s_1990.pdf.

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Single crystal metal sulfides of ZnS, CdS, and FeS[2] were bombarded with a 3 keV Ar[+] beam. The secondary neutrals sputtered from the suface of the target were interrogated by laser ionization mass spectrometry and laser fluorescence spectroscopy. The velocity distribution and yield of sputtered Fe from a FeS[2] sample were measured. The velocity distribution of Fe sputtered from the sulfide is qualitatively the same as that of Fe sputtered from the pure metal. The yield of Fe from the sulfide target, after prolonged bombardment, was at most 20% of the yield from the metal. The results are

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Balaji, S. "Growth Aspects And Phonon Confinement Studies On Ion Beam Sputter Deposited Ultra Thin Films." Thesis, 2004. http://hdl.handle.net/2005/1086.

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The broad theme of the present research investigation is on the preparation and characterization of the ultra thin films. The emerging field of nano science and technology demands the realization of different materials in nanometer dimension and a comprehensive understanding of their novel properties. Especially, the properties of the semiconducting materials in the nano dimensions are quite different from their bulk phase. A phase transition from semimetalic to semiconducting nature occurs at a thickness < 5nm of Sb ultra thin films. These facts emphasize the need for preparing these material

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Hsu, Shu-wei, та 許書瑋. "Scanning tunneling microscopy and spectroscopy of the electronic structure of Mn δ-doped GaN films grown by molecular beam epitaxy". Thesis, 2011. http://ndltd.ncl.edu.tw/handle/05070512471783049803.

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碩士<br>國立中山大學<br>物理學系研究所<br>99<br>The electronic structures of Mn δ-doped epitaxial GaN films grown on sapphire substrates are studied by scanning tunneling microscopy in this work. Local structural information and the corresponding electronic properties of Mn δ-doped GaN films are probed by the combination of scanning tunneling microscopy and atomic-scale scanning tunneling spectroscopy measurements. According to the electronic local density of states analysis indicates that Mn ions develop an acceptor level in GaN, revealing a gap state located at ~ 1.4 eV above the valence band edge of GaN.

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(8082680), Christopher P. Harrilal. "APPLICATION OF CRYOGENIC INFRARED AND ULTRAVIOLET SPECTROSCOPY FOR STRUCTURAL AND DYNAMIC STUDIES OF GAS PHASE IONS." Thesis, 2019.

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<p>The work presented here employs cryogenic ion spectroscopy for the study of protein structure, kinetics, and dynamics. The main technique used is IR-UV double resonance spectroscopy. Here peptide ions are generated through nano electrospray ionization, guided into a mass spectrometer, mass selected, and then guided into a cryogenically held octupole ion trap. Ions are subsequently cooled to their vibrational ground state through collisions with 5 K helium allowing for high resolution IR and UV spectra to be recorded. The IR spectra are highly sensitive to an ion’s conformation, and the well

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McFarland, Melinda A. Marshall Alan G. "Fourier transform ion cyclotron resonance mass spectrometry instrumentation and methods for structural characterization of trapped biomolecular ions innovative MS/MS techniques, gas-phase hydrogen/deuterium exchange, and laser-induced fluorescence /." 2004. http://etd.lib.fsu.edu/theses/available/etd-08252004-191254.

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Thesis (Ph. D.)--Florida State University, 2004.<br>Advisor: Dr. Alan G. Marshall, Florida State University, College of Arts and Sciences, Dept. of Chemistry and Biochemistry. Title and description from dissertation home page (viewed Jan. 12, 2005). Includes bibliographical references.

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Paul, DEVPROSHAD. "STRUCTURE AND PROPERTIES OF SELF-ASSEMBLED SUB-MICRON THIN NAFION® FILMS." Thesis, 2013. http://hdl.handle.net/1974/8410.

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This thesis is concerned with the study of morphology and properties of sub-micron thin Nafion® films. The motivation of the work arises from the need to characterize the 4 -10 nm thin ionomer films in the catalyst layer of polymer electrolyte fuel cell (PEFC). A protocol for the fabrication of self-assembled ultra-thin Nafion® films on planar substrates was successfully developed. Films of thickness ranging 4 nm-300 nm, determined by three different techniques - variable angle spectroscopy ellipsometry (VASE), atomic force microscope (AFM) and x-ray photo-electron spectroscopy (XPS), could

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Ryu, Suk-Kyu. "Thermo-mechanical stress analysis and interfacial reliabiity for through-silicon vias in three-dimensional interconnect structures." Thesis, 2011. http://hdl.handle.net/2152/ETD-UT-2011-12-4580.

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Continual scaling of devices and on-chip wiring has brought significant challenges for materials and processes beyond the 32-nm technology node in microelectronics. Recently, three-dimensional (3-D) integration with through-silicon vias (TSVs) has emerged as an effective solution to meet the future interconnect requirements. Among others, thermo-mechanical reliability is a key concern for the development of TSV structures used in die stacking as 3-D interconnects. In this dissertation, thermal stresses and interfacial reliability of TSV structures are analyzed by combining analytical and numer

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Martens, Sabrina M. "Characterization of Several Small Biologically Relevant Molecules by Infrared Multiple Photon Dissociation Spectroscopy and Electronic Structure Calculations." Thesis, 2011. http://hdl.handle.net/10012/5887.

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Infrared multiple photon dissociation (IRMPD) spectroscopy has been coupled with electronic structure calculations in order to elucidate the structures of several small biological molecules including: uracil, 5-fluorouracil, 5-fluorocytosine, ferulic acid, and a number of their related analogs. IRMPD is a powerful technique, that when combined with electronic structure calculations can provide convincing evidence for the structural characterization of ions in the gas phase. Isomers of uracil and 5-fluorouracil (5-FU) have been characterized by calculations performed at the MP2(full)/aug-cc-

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