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Dissertations / Theses on the topic 'Liquid lasers'

Author: Grafiati

Published: 28 May 2022

Last updated: 31 July 2025

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1

Ford, A. D. "Liquid crystal lasers." Thesis, University of Cambridge, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.599106.

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This thesis examines the emission properties of liquid crystal (LC) lasers. The aim is to investigate correlations between the emission properties of the laser, in particular the threshold energy and the slope efficiency, and the macroscopic physical properties of the liquid crystal host. Using the threshold gain term obtained for a distributed feedback laser in the context of the coupled mode theory, an expression for the threshold energy (<i>E</i><sub>th</sub>) is obtained, in the form <i>E<sub>th </sub></i> ∝ <i>d</i> + 1/Δn²d² where <i>d</i> is the cell thickness and Δ<i>n</i> is the biref

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2

Zhu, Xiang. "Tunable diode lasers and their applications in trace gas and liquid detection /." *McMaster only, 1996.

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3

Gillespie, C. "Dye doped liquid crystal lasers." Thesis, University of Cambridge, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.599422.

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This thesis examines the emission properties of dye-doped liquid crystal lasers, which are of interest because they have the potential to provide compact, low threshold, tunable laser sources for applications ranging from medicine to displays. The primary aim is to provide the first detailed study of the interactions between liquid crystals (LCs) and laser dyes and to examine their effect upon the emission properties of dye-doped liquid crystal lasers. Five different dyes are examined and, in all cases, the LC host (a nematic mixture, E49) is shown to have a significant effect upon the propert

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4

Zhou, Ying. "CHOLESTERIC LIQUID CRYSTAL PHOTONIC CRYSTAL LASERS AND PHOTONIC DEVICES." Doctoral diss., University of Central Florida, 2008. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/2706.

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This dissertation discusses cholesteric liquid crystals (CLCs) and polymers based photonic devices including one-dimensional (1D) photonic crystal lasers and broadband circular polarizers. CLCs showing unique self-organized chiral structures have been widely used in bistable displays, flexible displays, and reflectors. However, the photonic band gap they exhibit opens a new way for generating laser light at the photonic band edge (PBE) or inside the band gap. When doped with an emissive laser dye, cholesteric liquid crystals provide distributed feedback so that mirrorless lasing is hence possi

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5

Williams, Geoffrey. "Electrically controllable liquid crystal Fresnel lenses." Thesis, Durham University, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.303875.

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6

Sivni, V. B., and О. S. Hnatenko. "Investigation of the Generation of Droplet Lasers." Thesis, Sumy State University, 2018. http://essuir.sumdu.edu.ua/handle/123456789/67958.

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In this paper, the geometric parameters of liquid resonators of the type of a whisperer gallery are investigated and calculated theoretically. Namely, the laser dye Rhodamine 6G in the form of a drop on the substrate is pumped at a wavelength of 532 nm and emits a wavelength of 580 nm. The paper investigates the change in the wavelength of the radiation with a change in the droplet size. And also calculated the maximum angles of adhesion of the drop to the substrate.

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7

Sivni, V. B., and O. S. Hnatenko. "Investigation of the Generation of Droplet Lasers." Thesis, Sumy State University, 2018. http://openarchive.nure.ua/handle/document/6803.

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In this paper, the geometric parameters of liquid resonators of the type of a whisperer gallery are investigated and calculated theoretically. Namely, the laser dye Rhodamine 6G in the form of a drop on the substrate is pumped at a wavelength of 532 nm and emits a wavelength of 580 nm. The paper investigates the change in the wavelength of the radiation with a change in the droplet size. And also calculated the maximum angles of adhesion of the drop to the substrate.

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8

Comley, Andrew James. "High intensity laser interactions with liquid microdroplets." Thesis, Imperial College London, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.252017.

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9

Commander, Lawrence. "Variable focal length liquid crystal immersed microlenses." Thesis, University College London (University of London), 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.266103.

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10

Romanyuk, Yaroslav. "Liquid-phase epitaxy of doped KY(WO₄)₂ layers for waveguide lasers /." Lausanne, 2005. http://library.epfl.ch/theses/?nr=3390.

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Thèse sciences, EPF Lausanne, no 3390 (2005), Faculté Sciences et techniques de l'ingénieur STI, Section de microtechnique (Institut d'imagerie et optique appliquée). Directeur: R.P. Salathé ; rapporteurs: B. Deveaud-Plédran ... et al.

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11

Elejalde, Untzizu. "Intracavity detection of chemicals in the liquid phase with semiconductor lasers." Thesis, University of Strathclyde, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.487865.

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Near infrared spectroscopic techniques have always played an important role in the monitoring of chemical processes. In particular the use of near infrared absorption spectroscopy is used as a standard laboratory method of determining the chemicals present within a given sample. Conventional near IR spectroscopy generally does not have a high sensitivity for trace chemical detection, or are not well suited for on-line, real-time, reaction monitoring of liquid species at very low concentrations and for bio-molecule detection. With the advent of lab-on-a-chip systems and micro-fluidic chemistry

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12

Jewell, Sharon Ann. "Optical waveguide characterisation of hybrid aligned nematic liquid crystal cells." Thesis, University of Exeter, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.269682.

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13

Mavrogordatos, Themistoklis. "Emission properties of radiative chiral nematic liquid crystals." Thesis, University of Cambridge, 2015. https://www.repository.cam.ac.uk/handle/1810/247156.

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In this work, we calculate the density of photon states (DOS) of the normal modes in dye-doped chiral nematic liquid crystal (LC) cells in the presence of various loss mechanisms. Losses and gain are incorporated into the transmission characteristics through the introduction of a small imaginary part in the dielectric constant perpendicular and along the director, for which we assume no frequency dispersion. Theoretical results are presented on the DOS in the region of the photonic band gap for a range of values of the loss coefficient and different values of the optical anisotropy. The obtain

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14

Zhu, Xiang. "Tunable diode lasers and their applications in trace gas and liquid detection." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp03/NQ30183.pdf.

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15

Poole, Patrick. "Liquid crystals as high repetition rate targets for ultra intense laser systems." The Ohio State University, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=osu1429820441.

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16

Wood, Simon. "Liquid crystals and novel gain materials for thin-film photonic devices." Thesis, University of Oxford, 2017. https://ora.ox.ac.uk/objects/uuid:934d6116-6f22-4274-b718-a83e647a738c.

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This thesis describes work to create a variety of thin-film photonic devices based upon liquid crystalline materials. Firstly, a variety of liquid crystal phases are polymer- templated by combining a liquid crystalline material with photo-polymerisable reactive mesogens. Upon photo-curing, a polymer scaffold, which is a template of the original phase, is formed with liquid crystal molecules in interstitial sites. This liquid crystal is removed to yield a polymer scaffold which can be used to template the original phase. Here, polymer-templating is used to template the smectic A liquid crystal

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17

Lloyd, David Kenneth. "Laser-based polarimetric instrumentation and applications in high-performance liquid chromatography and kinetic studies." Thesis, University of York, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.238692.

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18

Charlton, Christy. "Quantum Cascade Lasers for Mid-Infrared Chemical Sensing." Diss., Georgia Institute of Technology, 2005. http://hdl.handle.net/1853/13953.

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The mid-infrared (MIR) spectral range (2-20 m) is particularly useful for chemical sensing due to the excitation of fundamental rotational and vibrational modes. In the fingerprint region (10-20 m), most organic analytes have unique absorption patterns; absorption measurements in this region provide molecule-specific information with high sensitivity. Quantum cascade lasers (QCLs) present an ideal light source for (MIR) chemical sensing due to their narrow linewidth, high spectral density, compact size, and ease of fabrication of nearly any MIR wavelength. As the emission wavelength is depe

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19

Novak, Vladimir. "Experimental and Numerical Studies of Mist Cooling with Thin Evaporating Subcooled Liquid Films." Diss., Georgia Institute of Technology, 2006. http://hdl.handle.net/1853/10528.

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An experimental and numerical investigation has been conducted to examine steady, internal, nozzle-generated, gas/liquid mist cooling in vertical channels with ultra-thin, evaporating subcooled liquid films. Interest in this research has been motivated by the need for a highly efficient cooling mechanism in high-power lasers for inertial fusion reactor applications. The aim is to quantify the effects of various operating and design parameters, viz. liquid atomization nozzle design (i.e. spray geometry, droplet size distribution, etc.), heat flux, liquid mass fraction, film thickness, carrier g

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20

Bain, Fiona Mair. "Yb:tungstate waveguide lasers." Thesis, University of St Andrews, 2010. http://hdl.handle.net/10023/1698.

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Lasers find a wide range of applications in many areas including photo-biology, photo-chemistry, materials processing, imaging and telecommunications. However, the practical use of such sources is often limited by the bulky nature of existing systems. By fabricating channel waveguides in solid-state laser-gain materials more compact laser systems can be designed and fabricated, providing user-friendly sources. Other advantages inherent in the use of waveguide gain media include the maintenance of high intensities over extended interaction lengths, reducing laser thresholds. This thesis present

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21

Bolaños, Rodríguez Western. "Development and characterization of waveguide lasers on monoclinic potassium double tungstates." Doctoral thesis, Universitat Rovira i Virgili, 2011. http://hdl.handle.net/10803/34772.

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La realización de esta tesis doctoral permitió confirmar la combinación exitosa de la configuración de láseres guiados y las propiedades espectroscópicas de los dobles tungstatos de potasio y tierra rara para ser usados en la fabricación de dispositivos de óptica integrada. Mediante crecimiento epitaxial en fase líquida (LPE) de capas monocristalinas de KY1-x-yGdxLuy(WO4)2 activadas con Er3+ y Tm3+ se fabricaron guías de onda planas. Usando la composición KY0.58Gd0.22Lu0.17Tm0.03(WO4)2 se demostró por primera vez un láser guiado en los regímenes continuo y pulsado (Q-switch) con emisión a

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22

Iliopoulos, Vasileios. "Novel antennas on Si and organic substrates." Thesis, Georgia Institute of Technology, 2003. http://hdl.handle.net/1853/15670.

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23

Shasti, Mansoureh. "NEMATIC LIQUID CRYSTAL GUEST-HOST SYSTEM FOR EYEWEAR ANDRANDOM LASER APPLICATIONS." Kent State University / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=kent1556626607581832.

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24

Stolyarov, Alexander. "Integrated Optofluidic Multimaterial Fibers." Thesis, Harvard University, 2012. http://dissertations.umi.com/gsas.harvard:10080.

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The creation of integrated microphotonic devices requires a challenging assembly of optically and electrically disparate materials into complex geometries with nanometer-scale precision. These challenges are typically addressed by mature wafer-based fabrication methods, which while versatile, are limited to low-aspect-ratio structures and by the inherent complexity of sequential processing steps. Multimaterial preform-to-fiber drawing methods on the other hand present unique opportunities for realizing optical and optoelectronic devices of extended length. Importantly, these methods allow f

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25

Rivière, David. "Ecoulements thermogravitaires et thermocapillaires induits par chauffage laser dans des couches liquides." Thesis, Bordeaux, 2016. http://www.theses.fr/2016BORD0341/document.

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Ce travail de thèse est consacré à l’étude des écoulements thermogravitaires et thermocapillaires induits par chauffage laser dans des couches liquides. Le chauffage d’un système à deux liquides donne naissance à deux effets thermiques. Le premier est dû à la variation de la masse volumique avec la température et le second à la variation de la tension interfaciale avec la température. Nous avons dans un premier temps étudié ces deux contributions séparément. En confrontant expériences, théorie et simulations numériques nous avons démontré que la morphologie des écoulements thermogravitaires dé

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26

Bolis, Serena. "Spatial optical solitons and optical gain in liquid crystal devices." Doctoral thesis, Universite Libre de Bruxelles, 2018. https://dipot.ulb.ac.be/dspace/bitstream/2013/268937/5/contratSB.pdf.

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In this work, we study the nonlinear propagation of light in liquid crystals (LCs) and the optical gain provided by LCs when they are polymer- or dye-doped.We will focus on nematic LCs, which are characterized by a mean orientation (also called director) of the elongated molecules and by a subsequent birefringence. After a general introduction on LCs, we focus on the nonlinear propagation of light in nematic LCs, and in particular the soliton-like propagation (nematicon). Indeed, if the light injected in the cell is intense enough, it can create a waveguide that counteracts the diffraction of

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27

Cochran, Ginevra E. "New Computational and Experimental Approaches for Studying Ion Acceleration and the Intense Laser-Plasma Interaction." The Ohio State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=osu1534432188474908.

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28

Guarguaglini, Marco. "Laser-driven shock compression of liquid mixtures and silica up to extreme thermodynamic conditions of interest for planetary interior models." Thesis, Université Paris-Saclay (ComUE), 2019. http://www.theses.fr/2019SACLX075/document.

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L’étude du comportement des composantes des intérieurs planétaires dans des conditions extrêmes de pression (megabar) et température (milliers de Kelvin) est essentielle afin de construire des modèles fiables décrivant l’évolution et la structure des planètes. Dans ce travail, nous avons étudié plusieurs composantes par compression par choc laser sur les installations LULI2000 (France) et GEKKO XII (Japon).Nous avons employé des chocs décroissants pour étudier des conditions de haute-pression / haute-température. Afin d’accéder à des conditions de température modérée, nous avons utilisé des te

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29

Petit, Julien. "Déformations et instabilités d’interfaces liquides pilotées par la diffusion d’une onde laser en milieux turbides." Thesis, Bordeaux 1, 2011. http://www.theses.fr/2011BOR14454/document.

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Ce travail de thèse est consacré à l’étude des déformations d’interfaces liquides par l’action d’une onde laser continue. Nous démontrons que la diffusion élastique d'une onde laser dans un milieu turbide induit une force diffusive en volume qui donne naissance à des écoulements permanents au sein du fluide. Les contraintes visqueuses associées à ces écoulements, à l’approche d’une interface liquide molle, peuvent engendrer la déformation de celle-ci jusqu’à la déstabiliser et former un jet. Dans ce manuscrit, nous présentons une étude expérimentale de ce nouveau couplage lumière-fluide complé

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30

El-Rabii, Hazem. "Etude à l'allumage par laser de mélanges en phases liquides dispersées et gazeuses." Châtenay-Malabry, Ecole centrale de Paris, 2004. http://www.theses.fr/2004ECAP0959.

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L'étude de l'allumage d'un mélange gazeux combustible/comburant est d'un intérêt fondamental et d'une importance cruciale dans les moteurs à combustion interne et dans les turbines à gaz. Une nouvelle méthode d'allumage, récemment utilisée, consiste à créer une étincelle par focalisation d'un faisceau laser. 'Objectif du présent travail est d'effectuer une étude paramétrique de ce mode d'allumage pour des mélanges en phases liquides dispersées et gazeuses, ainsi que d'apporter une contribution à la compréhension des phénomènes physiques liés au claquage optique, aussi bien dans l'air que dans

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31

PELENC, DENIS. "Elaboration par epitaxie en phase liquide et caracterisation de couches monocristallines de yag dope : realisation de lasers guide d'onde neodyme et ytterbium a faibles seuils." Grenoble 1, 1993. http://www.theses.fr/1993GRE10171.

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Dans le cadre des recherches sur des dispositifs laser compacts pouvant etre pompes par diodes, ce memoire decrit le developpement d'une nouvelle technique d'elaboration de lasers guides d'onde, l'epitaxie en phase liquide. Cette technique a ete appliquee a la croissance de couches minces monocristallines de yag dope neodyme et ytterbium sur des substrats de yag non dope. Afin d'obtenir des guides de bonne qualite, nous avons defini les conditions de croissance des couches et montre l'interet de la croissance d'une surcouche de confinement. Deux co-dopages ont ete etudies en supplement a l'ion

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32

Diouf, Mouhamed. "Synthèse de nanoparticules par ablation laser en liquide et étude de leurs propriétés optiques." Phd thesis, Université Claude Bernard - Lyon I, 2012. http://tel.archives-ouvertes.fr/tel-00850690.

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De nombreux domaines, tels que le biomédical, la micro-fluidique ou l'optique quantique, sont demandeurs de nanoparticules présentant des propriétés optiques spécifiques. L'ablation laser en liquide, PLAL (Pulsed Laser Ablation induced in Liquid) est une méthode de synthèse permettant d'élaborer rapidement des nanoparticules dans une large gamme de matériaux, et donc de tester la conservation ou la modification des propriétés optiques originales identifiées dans certains matériaux lorsque l'on passe aux tailles nanométriques (scintillation, thermoluminescence, photo-stimulation, haut rendement

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33

Fourmaux, Sylvain. "Etude de la transition de phase ultrarapide solide/liquide d'un semiconducteur par diffraction X femtoseconde." Palaiseau, Ecole polytechnique, 2002. http://www.theses.fr/2002EPXX0017.

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34

Kosalathip, Voravit. "Synthèse et caractérisation microstructurale de poudres nanométriques à base de Bi2Te3 et Sb2Te3 : contribution à l'état de l'art des nanocomposites thermoélectriques." Thesis, Vandoeuvre-les-Nancy, INPL, 2008. http://www.theses.fr/2008INPL033N/document.

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L’étude de matériaux thermoélectriques nanocomposites et nanostructurés est en plein essor suite à l’intérêt de multiplier le nombre d’interfaces et de diminuer la taille des objets pour améliorer les performances. Nous avons mis au point une nouvelle méthode de préparation de nanopoudres thermoélectriques de type n (Bi0.95Sb0.05)2(Te0.95Se0.05)3 et de type p (Bi0.2Sb0.8)2Te3, à partir de la fracturation laser en milieu aqueux de poudres de taille micrométrique. La cellule de préparation développée permet d’obtenir par jour environ 200 mg de poudres nanométriques cristallisés présentant la str

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35

Sharpe, Donal J. "Laser light scattering from liquid surfaces." Thesis, Queen's University Belfast, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.282336.

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36

Morgan, Rhys Gareth. "Studies of liquid-liquid two-phase flows using laser-based methods." Thesis, Imperial College London, 2012. http://hdl.handle.net/10044/1/10145.

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The research described in this thesis has been focused on the detailed investigation of horizontal co-current liquid-liquid two-phase flows. The experiments were carried out in channels of square and circular cross section and involved the use of two immiscible liquids of matched refractive index; namely an oil (Exxol™D80) and a 81.7 wt% glycerol-water solution. The experiments were carried out in a refurbished liquid-liquid flow facility (TOWER) and the focus was on examining the flows using high-speed laser-based visualisation methods which allowed both qualitative evaluation of the nature o

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37

Petitjean, Yoann. "Modélisation dynamique et caractérisation de lasers à cascade quantique Térahertz refroidis à l'hélium liquide." Toulouse, ISAE, 2010. http://www.theses.fr/2010ESAE0020.

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La région du spectre électromagnétique comprise entre 300 GHz et 10 THz a longtemps été surnommée « gap Térahertz ». En effet, les sources et détecteurs dans cette gamme de fréquences étaient éparses, peu performants, coûteux et/ou encombrants jusqu'à l’invention du laser à cascade quantique (QCL pour Quantum Cascade laser). De nombreuses équipes de recherche se concentrent sur l’amélioration des performances des QCLs, notamment l'augmentation de la température de fonctionnement maximale car cette source ouvre la voie vers de nouvelles applications comme les oscillateurs locaux à très haute fr

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38

Ali, Muhammad. "Etude d'un nouveau dispositif de bioimpression par laser." Thesis, Bordeaux, 2014. http://www.theses.fr/2014BORD0070/document.

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Les technologies laser sont largement utilisées dans le contexte de l'impression 3D de matériaux de toute taille ainsique pour la bioimpression des constituants de tissue biologiques. Dans ce contexte, la bioimpression par laser (LAB), basée sur le procédé LIFT, a émergé comme une technique permettant de s'affranchir des inconvénients des technologies d'impression à jet d'encre(par exemple le colmatage). La bioimpression par Laser est une technique d'écriture directe de matériaux sous forme solide ou liquide dotée d'une haute résolution spatiale. La technique permet ainsi le transfert précis d

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39

Boisnard, Benjamin. "Conception et réalisation d'une source VCSEL accordable pour un microsystème d'analyse de la peau par tomographie par cohérence optique (OCT)." Thesis, Toulouse 3, 2019. http://www.theses.fr/2019TOU30271.

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Ces travaux de thèse portent sur la conception, la réalisation et la caractérisation de diodes VCSELs (Vertical-Cavity Surface-Emitting Lasers) accordables spectralement et intégrables dans un système miniaturisation d'analyse SS-OCT (Tomographie par Cohérence Optique à balayage de source) pour la détection précoce des pathologies de la peau. L'approche originale que nous avons explorée pour réaliser la source VCSEL accordable à 850nm réside dans l'exploitation de cristaux liquides (CLs) nématiques intracavité. Ceci permet d'en envisager une meilleure stabilité mécanique et une tension de comm

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40

Newsome, Christopher James. "Liquid crystal alignment on excimer laser irradiated polyimide." Thesis, University of Hull, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.310307.

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41

Harris, Peter Ronald. "Laser desorption from a room temperature ionic liquid." W&M ScholarWorks, 2009. https://scholarworks.wm.edu/etd/1539623542.

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We report laser desorption from a Room Temperature Ionic Liquid (RTIL) as a novel source for time of flight mass spectrometry. We use the 2nd harmonic of an Nd:YAG laser to deposit intensities of 1-50 MW/cm2 via backside illumination onto our RTIL desorption sample. A microstructured metal grid situated on top of a glass microscope slide coated with RTIL serves as our desorption sample. The RTIL we use, 1-Butyl, 3-Methylimidazolium Hexafluorophosphate, remains liquid at pressures below 10-8 torr. The use of liquid desorption sample allows for improved surface conditions, homogeneity and sample

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42

Aanensen, Nina Sasaki. "Nonlinear Laser-induced Deformations and Forces at Liquid-Liquid Interfaces near the critical Point." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for fysikk, 2011. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-14264.

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The theory of laser-induced liquid-liquid interface deformation has been presented and used to derive a differential equation describing the shape of the deformation. The differential equation has been investigated and solved numerically, and the results have been compared to the experimental results of the Bordeaux group. A model describing the maximum depth of the deformation based on the theory of a sphere in an electric field has also been investigated.The deformations from the numerical solutions of the differential equation are too wide compared to the experimental results. The shoulder-

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43

Harrison, Neil J. "Laser induced birefringence in pure liquids." Thesis, University of Reading, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.305404.

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44

McLaren-Jones, Jennifer Sian Elizabeth. "Band edge lasing in chiral nematic liquid crystals." Thesis, University of Cambridge, 2019. https://www.repository.cam.ac.uk/handle/1810/288382.

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For the last 20 years, there has been considerable interest in chiral nematic liquid crystal band edge lasers. The birefringent molecules of chiral nematic liquid crystals form a periodic helical structure, which results in a photonic bandgap for circularly polarised light with the same sense of rotation as the helix. A large increase in effective gain is seen for a fluorescent gain medium within the liquid crystal at the band edges, resulting in lasing. Applications of liquid crystal lasers could include miniature medical diagnostic tools, large-area holographic laser displays, and environmen

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Popovic, D. M., A. A. Zekic, M. Trtica, and J. Stasic. "Picosecond Laser Ablation of Silicon Single Crystal in a Liquid Environment." Thesis, Sumy State University, 2012. http://essuir.sumdu.edu.ua/handle/123456789/34927.

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The picosecond Nd:YAG laser at wavelengths of 1064 nm was used to produced the silicon-based nanoparticles in de-ionized water. The main goal of our work presented here was enlight the role of thermal effects on the process of laser ablation of solid target in liquid. To accieve this goal the additional heating of the target surface by continuous laser was applied during the experiment. The shift of nanoparticles size distribution caused by applying of additional continuous laser was reported in this work. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/

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Faye, Cheikh Benoit. "Détection des polluants métalliques particulaires dans les liquides par la spectroscopie de plasma induit par laser." Thesis, Lyon 1, 2014. http://www.theses.fr/2014LYO10099/document.

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La pollution des eaux est une préoccupation majeure relayée par la Communauté Européenne. Cette problématique s'accentue avec les particules métalliques et l'émergence de produits nanostructurés tels les Nano-objets, leurs Agrégats et leurs Agglomérats (NOAA). Ces NOAA constituent un cas particulier de polluants du fait de leurs propriétés physicochimiques. La surveillance et le contrôle de ces polluants dans les eaux, nécessite le développement d'instruments de mesure aptes à répondre à ce fléau environnemental. Dans ce contexte, la technique de spectroscopie de plasma induit par laser ou Las

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Price, Christopher. "High-intensity laser interactions with optically levitated liquid microdroplets." Thesis, Imperial College London, 2014. http://hdl.handle.net/10044/1/25282.

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The interaction of sub-picosecond pulses of high intensity laser light with micron, and sub-micron scale objects is currently highly topical. These targets are in a size regime that is intermediate between atomic cluster targets ( ~100 Angstrom) and macro- scopic solids which, unlike microtargets, have been the subject of many studies over recent years. Mass-limited objects can couple very strongly to an intense laser field due to transient plasma resonances or Mie scattering processes and absorb substan- tial amounts of laser energy. These targets off er a unique geometry and size that can po

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Lu, Tong. "Laser-based Rapid Prototyping Techniques for Liquid Metal Circuits." Research Showcase @ CMU, 2016. http://repository.cmu.edu/dissertations/760.

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Stretchable electronics has been a rapidly developing technology which allows devices to be deformed dramatically. Compared with conventional technologies, with which devices are made of rigid materials, stretchable electronics enables devices to be stretched, twisted, and bent robustly. Such features contribute to a greater functionality and make the devices suitable for applications such as wearable devices that need to adapt to complicated geometries. Additionally, compared to conventional electronics, a wearable device that consists of stretchable electronics is safer for users. The existi

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Lu, Tian. "Nanomaterials For Liquid Chromatography and Laser Desorption/Ionization MassSpectrometry." The Ohio State University, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=osu1376981440.

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Said, Jamal. "Réalisation de sources laser accordables pompées par flashs avec un milieu actif liquide ou solide (Titane-saphir)." Dijon, 1991. http://www.theses.fr/1991DIJOS042.

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Nous avons développé, au laboratoire SMIL, différents circuits d'une alimentation électrique conçue pour des décharges rapides dans les lampes flashs. Ces impulsions durent 1,5 à 3 microsecondes avec des cadences de tir pouvant atteindre 30 Hz. Ensuite, un laser à colorant pompé par flashs a été réalisé. Ce laser a servi d'amplificateur par l'injection d'un faisceau issu d'un laser à krypton monomode dans une cavité plane en anneau. Cette cavité, formée de quatre miroirs plans, a permis d'obtenir des impulsions lasers de bonne qualité spectrale et d'une puissance crête de plus de 40 kw. Par la

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