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Rozprawy doktorskie na temat „Optical field manipulation”

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Data publikacji: 9 listopada 2024

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1

Ganic, Djenan, and dga@rovsing dk. "Far-field and near-field optical trapping." Swinburne University of Technology. Centre for Micro-Photonics, 2005. http://adt.lib.swin.edu.au./public/adt-VSWT20051130.135436.

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Optical trapping techniques have become an important and irreplaceable tool in many research disciplines for reaching non-invasively into the microscopic world and to manipulate, cut, assemble and transform micro-objects with nanometer precision and sub-micrometer resolution. Further advances in optical trapping techniques promise to bridge the gap and bring together the macroscopic world and experimental techniques and applications of Microsystems in areas of physics, chemistry and biology. In order to understand the optical trapping process and to improve and tailor experimental techniques
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Ganic, Djenan. "Far-field and near-field optical trapping." Australasian Digital Thesis Program, 2005. http://adt.lib.swin.edu.au/public/adt-VSWT20051130.135436.

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Thesis (PhD) - Swinburne University of Technology, Faculty of Engineering and Industrial Sciences, Centre for Micro-Photonics, 2005.<br>A thesis submitted for the degree of Doctor of Philosophy, Centre for Micro-Photonics, Faculty of Engineering and Industrial Sciences, 2005. Typescript. Includes bibliographical references (p. 164-177). Also available on cd-rom.
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Morrish, Dru, and DruMorrish@gmail com. "Morphology dependent resonance of a microscope and its application in near-field scanning optical microscopy." Swinburne University of Technology. Centre for Micro-Photonics, 2005. http://adt.lib.swin.edu.au./public/adt-VSWT20051124.121838.

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In recent times, near-field optical microscopy has received increasing attention for its ability to obtain high-resolution images beyond the diffraction limit. Near-field optical microscopy is achieved via the positioning and manipulation of a probe on a scale less than the wavelength of the incident light. Despite many variations in the mechanical design of near-field optical microscopes almost all rely on direct mechanical access of a cantilever or a derivative form to probe the sample. This constricts the study to surface examinations in simple sample environments. Distance regulation betw
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Renaut, Claude. "Nanopinces optiques sur puce pour la manipulation de particules diélectriques." Thesis, Dijon, 2014. http://www.theses.fr/2014DIJOS010/document.

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Les nanocavités optiques sur puces sont devenues aujourd'hui des objets de base pour le piégeage et la manipulation d'objets colloïdaux. Nous étudions dans cette thèse des nanocavités comme briques de bases du piégeage et de la manipulation par forces optiques. La preuve de concept du piégeage de microsphères diélectriques apparaît comme le point de départ de l'élaboration d'un laboratoire sur puce. Dans le premier chapitre nous parcourons la bibliographie de l'utilisation des forces optiques en espace libre et en milieu confiné pour le piégeage de particules. Le second chapitre présente les d
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Yang, Xingyu. "Manipulating the inverse Faraday effect at the nanoscale." Electronic Thesis or Diss., Sorbonne université, 2024. http://www.theses.fr/2024SORUS219.

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Le magnétisme induit par la lumière décrit l'effet par lequel un matériau est magnétisé par une impulsion optique. Dans les matériaux transparents, la magnétisation induite optiquement peut être réalisée directement par la lumière polarisée circulairement. Parfois, dans les matériaux métalliques, ce type de magnétisation existe également en raison du trajet solénoïdal microscopique des électrons entraînés par la lumière polarisée circulairement. Dans certains cas, la lumière crée des courants de dérive continus circulants macroscopiques, qui induisent également une magnétisation continue dans
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6

Fulton, Ray. "Atomic and molecular manipulation in pulsed optical fields." Thesis, Heriot-Watt University, 2006. http://hdl.handle.net/10399/125.

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7

Pritchard, Matthew J. "Manipulation of ultracold atoms using magnetic and optical fields." Thesis, Durham University, 2006. http://etheses.dur.ac.uk/2373/.

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The loading and guiding of a launched cloud of cold atoms with the optical dipole force are theoretically and numerically modelled. A far-off resonance trap can be realised using a high power Gaussian mode laser, red-detuned with respect to the principal atomic resonance (Rb 5s-5p). The optimum strategy for loading typically 30% of the atoms from a Magneto optical trap and guiding them vertically through 22 cm is discussed. During the transport the radial size of the cloud is confined to a few hundred microns, whereas the unconfined axial size grows to be approximately 1 cm. It is proposed tha
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8

Lowney, Joseph Daniel. "Manipulating and Probing Angular Momentum and Quantized Circulation in Optical Fields and Matter Waves." Diss., The University of Arizona, 2016. http://hdl.handle.net/10150/612898.

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Methods to generate, manipulate, and measure optical and atomic fields with global or local angular momentum have a wide range of applications in both fundamental physics research and technology development. In optics, the engineering of angular momentum states of light can aid studies of orbital angular momentum (OAM) exchange between light and matter. The engineering of optical angular momentum states can also be used to increase the bandwidth of optical communications or serve as a means to distribute quantum keys, for example. Similar capabilities in Bose-Einstein condensates are being inv
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9

Sergides, M. "Optical manipulation of micro- and nano-particles using evanescent fields." Thesis, University College London (University of London), 2013. http://discovery.ucl.ac.uk/1410938/.

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We present a study of the manipulation of micro-particles and the formation of optically bound structures of particles in evanescent wave traps. Two trapping geometries are considered: the first is a surface trap where the evanescent field above a glass prism is formed by the interference of a number of laser beams incident on the prism-water interface; the second uses the evanescent field surrounding a bi-conical tapered optical fibre that has been stretched to produce a waist of sub-micron diameter. In the surface trap we have observed the formation of optically bound one- and two-dimensiona
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10

Braun, Marco. "Optically Controlled Manipulation of Single Nano-Objects by Thermal Fields." Doctoral thesis, Universitätsbibliothek Leipzig, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-206342.

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This dissertation presents and explores a technique to confine and manipulate single and multiple nano-objects in solution by exploiting the thermophoretic interactions with local temperature gradients. The method named thermophoretic trap uses an all-optically controlled heating via plasmonic absorption by a gold nano-structure designed for this purpose. The dissipation of absorbed laser light to thermal energy generates a localized temperature field. The spatial localization of the heat source thereby leads to strong temperature gradients that are used to drive a particle or molecule into a
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11

Cooper, Merlin Frederick Wilmot. "Measurement and manipulation of quantum states of travelling light fields." Thesis, University of Oxford, 2014. http://ora.ox.ac.uk/objects/uuid:79164748-ebb3-48e2-b4d4-1a4766d29217.

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This thesis is concerned with the generation of non-classical quantum states of light, the photon-level manipulation of quantum states and the accurate tomography of both quantum states and quantum processes. In optics, quantum information can be encoded and processed in both discrete and continuous variables. Hybrid approaches combining for example homodyne detection with conditional state preparation and manipulation are gaining increasing prominence. The development and characterization of a time-domain balanced homodyne detector (BHD) is presented. The detector has a bandwidth of 80 MHz, a
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12

Braun, Marco [Verfasser], Dieter [Gutachter] Braun, and Frank [Gutachter] Cichos. "Optically Controlled Manipulation of Single Nano-Objects by Thermal Fields / Marco Braun ; Gutachter: Dieter Braun, Frank Cichos." Leipzig : Universitätsbibliothek Leipzig, 2016. http://d-nb.info/1240482795/34.

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13

Brissinger, Damien. "Etude et manipulation de modes résonnants en champ proche optique." Phd thesis, Université de Bourgogne, 2010. http://tel.archives-ouvertes.fr/tel-00688008.

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Avec l'évolution rapide des techniques de nanofabrication et les besoins croissants d'intégration et d'utilisation à moindre cout énergétique, l'étude et la manipulation de résonances électromagnétiques d'objets de faibles dimensions représentent des enjeux cruciaux. Un des objectifs de ce travail de thèse a donc été d'approfondir nos connaissances de l'interaction entre le champ électromagnétique et la matière. Dans ce but la réalisation conjointe d'expériences en champ proche optique et le développement numérique de modèles associés nous ont permis d'étudier différentes résonances électromag
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14

Chiang, Wei-Yi, and 江威逸. "Nanoscale Material Dynamics and Manipulation under Confined Optical Field." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/betau8.

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15

Bayerle, Alex. "Coincident time-shared single molecule imaging, manipulation and bright-field microscopy." Thesis, 2011. http://hdl.handle.net/2152/ETD-UT-2011-12-4861.

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An apparatus that combines single molecule fluorescence, optical trapping and bright-field microscopy is presented. Given the spread over orders of magnitude of the light intensities for the different techniques, special considerations in choosing the spectral regions for each were taken. Moreover, imaging single molecules in a background of intense light from the infra red laser used for the optical trap has been shown to result in enhanced photo-bleaching due to two-photon processes. A scheme for fast time-sharing was implemented in which the fluorescence excitation light and the trap light
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16

Lin, Pin-Tso, and 林品佐. "Design of near-field optical tweezers for manipulating micro- and nanoparticles in chip system." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/32319715314645514607.

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博士<br>國立交通大學<br>光電工程研究所<br>103<br>Optical force enables the contactless and nondestructive manipulation of tiny fragile objects which is unachievable by any mechanical tweezers. Recent research on integrated optical trapping using the forces induced by evanescent fields has opened up new opportunities for the manipulation in lab-on-a-chip systems. Due to the highly localized field distribution in near field region, particles of sub-micrometer and even nanometer size can be manipulated with precision higher than most conventional tools. However the evanescent field is always weak and therefore
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17

"Manipulation of electromagnetic fields with plasmonic nanostructures: Nonlinear frequency mixing, optical manipulation, enhancement and suppression of photocurrent in a silicon photodiode, and surface-enhanced spectroscopy." Thesis, 2010. http://hdl.handle.net/1911/61994.

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Metallic nanostructures are one of the most versatile tools available for manipulating light at the nanoscale. These nanostructures support surface plasmons, which are collective excitations of the conduction electrons that can exist as propagating waves at a metallic interface or as localized excitations of a nanoparticle or nanostructure. Plasmonic structures can efficiently couple energy from freely propagating electromagnetic waves to localized electromagnetic fields and vice-versa, essentially acting as an optical antenna. As a result, the intensity of the local fields around and inside t
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18

Ng, Ming Yaw, and 吳民耀. "Manipulating surface plasmon of metallic nanoparticles and applications on near-field optical disk and fiber-optic biosensor." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/47008880597171265255.

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博士<br>國立臺灣師範大學<br>物理學系<br>95<br>High local-field enhancement appears in the vicinity of the surface of metallic nanostructures due to surface plasmon excitation and therefore electromagnetic fields can be confined and controlled in nanoscale region. The controllable and tunable surface plasmon of metallic nanoparticles is studied analytically and numerically using Mie scattering theory and finite-difference time-domain method, respectively. For a single coated metallic nanoparticle, the surface plasmon excitation can be controlled by changing permittivity of the coated material, and furthermor
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