Log in

Relevant bibliographies by topics / Diffraction electronics / Dissertations / Theses

To see the other types of publications on this topic, follow the link: Diffraction electronics.

Dissertations / Theses on the topic 'Diffraction electronics'

Author: Grafiati

Published: 28 May 2022

Last updated: 31 July 2025

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 dissertations / theses for your research on the topic 'Diffraction electronics.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse dissertations / theses on a wide variety of disciplines and organise your bibliography correctly.

1

Jafari, Amir. "Distributed etched diffraction grating demultiplexer." Thesis, McGill University, 2012. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=107746.

Full text

Abstract:

This doctoral thesis studies the concept of a distributed etched diffraction grating (DEDG) and presents a methodology to engineer the spectral response of the device. The design which incorporates a distributed Bragg reflector (DBR) at the facets of a conventional etched diffraction grating demultiplexer promises for a superior performance in multiple aspects. Where in a conventional etched diffraction grating, smooth vertical deep etched walls are required in order to realize a low insertion loss device; in the DEDG such requirement is significantly mitigated. Deep etched walls are replaced

APA, Harvard, Vancouver, ISO, and other styles

2

Mills, Benjamin. "Focussing and diffraction using a high harmonic source." Thesis, University of Southampton, 2009. https://eprints.soton.ac.uk/340844/.

Full text

Abstract:

High Harmonic Generation is a highly nonlinear process that can be used to generate a high flux, low divergence, coherent beam in the extreme ultraviolet (XUV) wavelength range. It is proposed that this radiation source could be implemented for microscopy using coherent diffractive imaging, with potential measurements including the shape characterisation of single proteins and other biological samples. This thesis documents the development of the diffraction beam line at the University of Southampton, and presents experimental results that show progress towards this goal. A spherical multilaye

APA, Harvard, Vancouver, ISO, and other styles

3

Wang, Songzhe. "Etched diffraction grating demultiplexer with distributed Bragg reflector facets on Silicon-on-insulator." Thesis, McGill University, 2014. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=123076.

Full text

Abstract:

Multiplexers and demultiplexers are essential components of a wavelength division multiplexing (WDM) system which allows for the multiplication of data transmission capacity based on existing telecom infrastructure. In this master thesis, a distributed etched diffraction grating (DEDG), which finds its application as the wavelength demultiplexer, is studied. The device is designed and built based on the platform of silicon on insulator (SOI). A center-fled reflective grating configuration is used for the design of the layout. Distributed Bragg grating reflectors are incorporated at the back of

APA, Harvard, Vancouver, ISO, and other styles

4

Goedecke, Walter 1954. "Field studies and scale modeling using cross-borehole electromagnetic diffraction probing." Thesis, The University of Arizona, 1990. http://hdl.handle.net/10150/278261.

Full text

Abstract:

The scope of these studies encompasses both field site testing and scale modeling. The purpose was to better understand the complexities of electromagnetic diffraction geotomography, or the imaging of ground between boreholes using electromagnetic waves. Two field sites and a scale model tank were investigated. One field site, the San Xavier Mine facility, is located in metamorphosed paleozoic limestone. This site proved a challenge in that the medium was fairly inhomogeneous and resulted in server wave scattering. Inter-borehole transmission allowed only 15 MHz to penetrate for an adequate si

APA, Harvard, Vancouver, ISO, and other styles

5

Alleyne, Colin J. "Determination of off-axis diffraction efficiency for fresnel microlenses using rigorous coupled wave analysis." Thesis, McGill University, 2003. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=79994.

Full text

Abstract:

Miniature diffractive lenses are an integral part of many modern optical systems; from optical disc pick-up heads to optical interconnects. Large feature size diffractive lenses are easily modeled using simple scalar diffraction theory. However, as the feature size of diffractive lenses becomes smaller the theoretical modeling of the systems becomes more complex; a rigorous diffractive theory becomes necessary. This thesis will determine the difference in analyzing a diffractive minilens with either a scalar or rigorous diffraction theory for a free-space optical interconnect with fast

APA, Harvard, Vancouver, ISO, and other styles

6

Weld, Andrew Mark. "Optical diffraction-based silicon sensors for the detection of DNA sequences." Thesis, University of Southampton, 2007. https://eprints.soton.ac.uk/47762/.

Full text

Abstract:

This thesis describes the design, fabrication and characterisation of diffraction-based sensors on silicon (100) substrates for the detection of complementary DNA sequences using colloidal gold labels. In-depth analysis of variations of DNA sequence within the human genome and association with diseases is expected to lead to personalised medical treatment. There is a great need for DNA analysis technologies and for techniques to determine whether sequence variations occur on the same chromosomal strand with applications in disease screening and diagnosis. Novel two-dimensional diffraction stru

APA, Harvard, Vancouver, ISO, and other styles

7

Parsons, Aaron D. "Coherent diffraction imaging using a high harmonic source at 40 eV." Thesis, University of Southampton, 2014. https://eprints.soton.ac.uk/370609/.

Full text

Abstract:

This thesis presents the current status of coherent diffractive imaging and ptychography using the high harmonic at the University of Southampton. The full system used to generate the 40 eV radiation and collect the far-field speckle patterns is outlined and critical criteria discussed. The algorithms used to re-phase the data are outlined and some simple 1-dimensional examples are given. The question of how to appropriately state the resolution of a coherent diffraction system is addressed and the concluding results are applied to the work in the experimental chapters, of which this thesis co

APA, Harvard, Vancouver, ISO, and other styles

8

Swaminathan, S. "Characterisation of III-V quaternary multilayer semiconductor device materials by X-ray diffraction." Thesis, University of Warwick, 1985. http://wrap.warwick.ac.uk/110577/.

Full text

Abstract:

Optoelectronic devices find extensive use in optical fibre communication systems as infrared sources, in view of a relatively low attenuation of the optical fibres for such sources in the spectral range 1.0 - 1.4 pm. In the study of optoelectronic device materials, minute variations in the lattice parameter of different layers cause lattice strain, which, along with other factors namely thermal gradients, a high density of recombining carriers in the active layer promote the motion, multiplication and growth of defects into network clusters. In this thesis a double crystal plane wave synchrotr

APA, Harvard, Vancouver, ISO, and other styles

9

Lee, Ken Koon-Hung. "Three-dimensional N x N passive optical star coupler based on the exact eigenmode coupling and diffraction theory." Thesis, University of Ottawa (Canada), 1992. http://hdl.handle.net/10393/7609.

Full text

Abstract:

A technique for a 3-Dimensional passive N x N optical star coupler is described. 3-Dimensional antiresonant reflecting optical waveguides (ARROW) are analyzed and utilised as the input and output waveguides of the N x N coupler. The effective Index Method will be employed to replace the 3-Dimensional ARROW waveguide by an equivalent slab waveguide with its refractive index profile determined by the geometrical shape of the ARROW Waveguide. In the slab waveguide analysis, the input waveguides are coupled to their neighbours. The interaction of the waveguides is described in terms of the normal

APA, Harvard, Vancouver, ISO, and other styles

10

Alcocer, P. R. C. "An alternative system for ECG analysis by the use of optical diffraction patterns : part I, electronics." Thesis, University of Sussex, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.385991.

Full text

APA, Harvard, Vancouver, ISO, and other styles

11

Mills, John David. "An investigation of phase-mask diffraction patterns and fibre Bragg gratings with scanning near-field optical microscopy." Thesis, University of Southampton, 2001. https://eprints.soton.ac.uk/15492/.

Full text

Abstract:

In recent years, near-field microscopy has been utilized for assessing the properties of optical wave-guides at an increasing rate. Here, a Scanning Near-field Optical Microscope (SNOM) has been designed and constructed in order to expand this work into an analysis of the optical and structural properties of fibre Bragg gratings, which are used throughout the optical fibre telecommunications network. By imaging the evanescent fields of Bragg gratings, a characterization technique has been developed which has enabled the acquisition of sub-wavelength information about the optical field distribu

APA, Harvard, Vancouver, ISO, and other styles

12

Tait, Jan. "An electro-optic measurement system for electric fields near RF and microwave radiators and scatterers." Thesis, Stellenbosch : Stellenbosch University, 2000. http://hdl.handle.net/10019.1/51596.

Full text

Abstract:

Thesis (MScEng)--University of Stellenbosch, 2000.<br>ENGLISH ABSTRACT: An electro-optic sensor system was developed which uses the modulated scatterer technique [1] to measure the fine structure-amplitude and phase-of electric fields with the minimum of perturbation. The theory for the technique is discussed in detail, with the Lorentz Reciprocity theorem as foundation. The system is also treated as a general two port and solved in terms of the impedances present. This comprises self impedances and mutual impedances. The signals scattered by the dipole scatterer are modeled as amplitu

APA, Harvard, Vancouver, ISO, and other styles

13

Рубан, Анатолій Іванович, Анатолий Иванович Рубан, Anatolii Ivanovych Ruban, Ольга Володимирівна Прокопчук, Ольга Владимировна Прокопчук та Olha Volodymyrivna Prokopchuk. "Аналіз режимів збудження просторових гармонік дифракційно-черенковського випромінювання в середовищі з різною діелектричною проникністю". Thesis, Сумський державний університет, 2016. http://essuir.sumdu.edu.ua/handle/123456789/45824.

Full text

Abstract:

Ефективним засобом розв'язання задач дифракційної електроніки є метод експериментального моделювання, при якому випромінювання електронної хвилі струму просторового заряду електронного потока (ЕП) моделюється випромінюванням поверхневої хвилі планарного діелектричного хвилеводу (ДХ), розташованого поблизу дифракційної решітки.

APA, Harvard, Vancouver, ISO, and other styles

14

Lertwiriyaprapa, Titipong. "An approximate UTD development for the radiation by antennas near or on thin material coated metallic wedges." Columbus, Ohio : Ohio State University, 2007. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1196281470.

Full text

APA, Harvard, Vancouver, ISO, and other styles

15

Bargain, François. "Structure semi-cristalline et propriétés d'usage de films de copolymères fluorés électro-actifs : influence de la composition et de la mise en forme." Thesis, Paris Sciences et Lettres (ComUE), 2017. http://www.theses.fr/2017PSLET007.

Full text

Abstract:

Le lien entre la structure semi-cristalline et les propriétés d’usage (mécaniques, diélectriques et électro-actives) de films de copolymères fluorés électro-actifs développés pour des applications en électronique organique imprimée a été étudié. Les matériaux investigués sont des copolymères poly(VDF-co-TrFE) et des terpolymères poly(VDF-ter-TrFE-ter-CTFE) à base de fluorure de vinylidène (VDF), trifluoroéthylène (TrFE) et chlorotrifluoroéthylène (CTFE).Les films de polymères obtenus par évaporation du solvant sont étudiés par diffraction des rayons X (SAXS-WAXS), DSC, FTIR, DMA, spectroscopie

APA, Harvard, Vancouver, ISO, and other styles

16

Bargain, François. "Structure semi-cristalline et propriétés d'usage de films de copolymères fluorés électro-actifs : influence de la composition et de la mise en forme." Electronic Thesis or Diss., Paris Sciences et Lettres (ComUE), 2017. http://www.theses.fr/2017PSLET007.

Full text

Abstract:

Le lien entre la structure semi-cristalline et les propriétés d’usage (mécaniques, diélectriques et électro-actives) de films de copolymères fluorés électro-actifs développés pour des applications en électronique organique imprimée a été étudié. Les matériaux investigués sont des copolymères poly(VDF-co-TrFE) et des terpolymères poly(VDF-ter-TrFE-ter-CTFE) à base de fluorure de vinylidène (VDF), trifluoroéthylène (TrFE) et chlorotrifluoroéthylène (CTFE).Les films de polymères obtenus par évaporation du solvant sont étudiés par diffraction des rayons X (SAXS-WAXS), DSC, FTIR, DMA, spectroscopie

APA, Harvard, Vancouver, ISO, and other styles

17

Zhang, Shuo. "Analysis of Phase Transitions and Crystal Structures of Novel Benzothiophene Derivatives." University of Akron / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=akron1449831649.

Full text

APA, Harvard, Vancouver, ISO, and other styles

18

Narrainen, Jessen. "Perforance evaluation of vehicle radiofrequency communication systems : contribution to the modelling approach." Thesis, Rennes, INSA, 2017. http://www.theses.fr/2017ISAR0007/document.

Full text

Abstract:

Le cadre général de cette thèse porte sur les communications véhicule à véhicule (V2V). L'objectif principal de ce type de communication est d'améliorer la sécurité routière et d'optimiser la fluidité du trafic. Les performances de systèmes de communication embarqués dépendent principalement de la configuration des antennes, du type de récepteurs utilisés (modem) et du canal de propagation. Le sujet de la thèse se concentre précisément sur l'élaboration d'un outil de simulation robuste et fiable pour optimiser les choix technologiques d'antennes et leurs implantations à bord. Il permettra de l

APA, Harvard, Vancouver, ISO, and other styles

19

Brundrett, David L. "Analysis, design, and applications of subwavelength diffraction gratings." Diss., Georgia Institute of Technology, 1997. http://hdl.handle.net/1853/15370.

Full text

APA, Harvard, Vancouver, ISO, and other styles

20

Dogbe, John Kofi. "Comparing cluster and slab model geometries from density functional theory calculations of si(100)-2x1 surfaces using low-energy electron diffraction." abstract and full text PDF (free order & download UNR users only), 2007. http://0-gateway.proquest.com.innopac.library.unr.edu/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3258835.

Full text

APA, Harvard, Vancouver, ISO, and other styles

21

Cussen, Edmund John. "The electronic properties of mixed metal oxides." Thesis, University of Oxford, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.301436.

Full text

APA, Harvard, Vancouver, ISO, and other styles

22

Fievre, Ange Marie P. "Uniquely Identifiable Tamper-Evident Device Using Coupling between Subwavelength Gratings." FIU Digital Commons, 2015. http://digitalcommons.fiu.edu/etd/1762.

Full text

Abstract:

Reliability and sensitive information protection are critical aspects of integrated circuits. A novel technique using near-field evanescent wave coupling from two subwavelength gratings (SWGs), with the input laser source delivered through an optical fiber is presented for tamper evidence of electronic components. The first grating of the pair of coupled subwavelength gratings (CSWGs) was milled directly on the output facet of the silica fiber using focused ion beam (FIB) etching. The second grating was patterned using e-beam lithography and etched into a glass substrate using reactive ion etc

APA, Harvard, Vancouver, ISO, and other styles

23

Chen, Yixin. "Electron diffraction analysis of amorphous Ge2Sb2Te5." Thesis, University of Oxford, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.669987.

Full text

APA, Harvard, Vancouver, ISO, and other styles

24

Krecinic, Faruk [Verfasser]. "Ultrafast electron diffraction and imaging using ionized electrons / Faruk Krecinic." Berlin : Freie Universität Berlin, 2017. http://d-nb.info/1142155447/34.

Full text

APA, Harvard, Vancouver, ISO, and other styles

25

Burnham, Shawn David. "Improved understanding and control of Mg-doped GaN by plasma assisted molecular beam epitaxy." Diss., Available online, Georgia Institute of Technology, 2007, 2007. http://etd.gatech.edu/theses/available/etd-06122007-133821/.

Full text

Abstract:

Thesis (Ph. D.)--Electrical and Computer Engineering, Georgia Institute of Technology, 2008.<br>Doolittle, W. Alan, Committee Chair ; Ferguson, Ian T., Committee Member ; Cressler, John D., Committee Member ; Dorsey, John F., Committee Member ; Carter, W. Brent, Committee Member.

APA, Harvard, Vancouver, ISO, and other styles

26

Plana, Ruiz Sergi. "Development & Implementation of an Electron Diffraction Approach for Crystal Structure Analysis." Doctoral thesis, Universitat de Barcelona, 2021. http://hdl.handle.net/10803/670887.

Full text

Abstract:

The application of electron diffraction to crystallographically characterize all kinds of materials has experienced new developments that have attracted some attention in recent years. A large number of structural analyses from different compounds have been already carried out with the help of 3D electron diffraction data that were not possible with the available X-ray methods. The use of a transmission electron microscope as an electron nano-diffractometer has proved to be advantageous when diffraction data from single nanocrystals are required, for instance in phase mixtures. In this way, th

APA, Harvard, Vancouver, ISO, and other styles

27

Skrypnychuk, Vasyl. "Vertical charge transport in conjugated polymers." Doctoral thesis, Umeå universitet, Institutionen för fysik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-133180.

Full text

Abstract:

Conjugated polymers are novel organic electronic materials highly important for organic photovoltaic applications. Charge transport is one of the key properties which defines the performance of conjugated polymers in electronic devices. This work aims to explore the charge transport anisotropy in thin films of P3HT, one of the most common conjugated polymers. Using X-ray diffraction techniques and charge transport measurements, the relation between vertical charge transport through thin P3HT films and structure of the films was established. It was shown that particular orientations of crystall

APA, Harvard, Vancouver, ISO, and other styles

28

Menzel, Andreas. "Step dynamics measurements with time-resolved low energy electron diffraction." Diss., Georgia Institute of Technology, 2002. http://hdl.handle.net/1853/27870.

Full text

APA, Harvard, Vancouver, ISO, and other styles

29

Taslimi, Shahrzad. "Fabrication of diffractive optical elements by electron beam lithography." Thesis, McGill University, 2011. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=96963.

Full text

Abstract:

Diffractive optical elements (DOEs) are an important component in the success of optical Microsystems. Electron beam lithography is a key part of fabricating these elements with submicron feature dimensions. This thesis presents work done on the development of a process for the fabrication of multilevel diffractive optics in glass substrates using this method. This project investigates various challenges involved in the process, addresses possible problems that may arise and proposes and investigates solutions to resolve them. Sources of possible error in the creation and transfer of the patte

APA, Harvard, Vancouver, ISO, and other styles

30

Blanchard, Lyons Denise Marie 1967. "A diffractive optic image spectrometer (DOIS)." Diss., The University of Arizona, 1997. http://hdl.handle.net/10150/289688.

Full text

Abstract:

The diffractive optic imaging spectrometer, DOIS, is a high resolution, compact, economical, rugged, programmable, multi-spectral imager. The design implements a conventional CCD camera and emerging diffractive optical element (DOE) technology in an elegant configuration, adding spectroscopy capabilities to current imaging systems. One limitation of DOEs, also known as zone plate lenses, is abundant chromatic aberration. DOIS exploits this typically unwanted effect, utilizing a DOE to perform the imaging and provide the dispersion necessary to separate a multi-spectral target into separate spe

APA, Harvard, Vancouver, ISO, and other styles

31

Ho, Wing-kin. "The (3x3) reconstruction of SIC(0001) : a low energy electron diffraction study /." Hong Kong : University of Hong Kong, 1998. http://sunzi.lib.hku.hk/hkuto/record.jsp?B19737105.

Full text

APA, Harvard, Vancouver, ISO, and other styles

32

King, Graham Missell. "Structural, Magnetic, and Electronic Studies of Complex Perovskites." The Ohio State University, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=osu1262114272.

Full text

APA, Harvard, Vancouver, ISO, and other styles

33

Topley, Robert. "Erasable diffractive grating couplers in silicon on insulator." Thesis, University of Southampton, 2014. https://eprints.soton.ac.uk/371751/.

Full text

Abstract:

This doctoral project investigates the design, fabrication and characterisation of germanium implanted grating couplers in silicon on insulator and their subsequent removal by laser annealing. The application for these devices is dominantly seen to be in wafer scale testing for optical integrated circuits, though the planar surface may offer benefits in other areas such as 3 dimensional optical circuits. Wafer scale testing is critical to reducing production costs and increasing production yield. In this thesis a method that allows testing of individual optical components within a complex opti

APA, Harvard, Vancouver, ISO, and other styles

34

Burgess, William George. "Charge density determination in semiconductors and other materials by electron diffraction." Thesis, University of Cambridge, 1995. https://www.repository.cam.ac.uk/handle/1810/275257.

Full text

APA, Harvard, Vancouver, ISO, and other styles

35

Gelbart, Asher. "Design and fabrication of a diffractive bar code scanner." Thesis, The University of Arizona, 2000. http://hdl.handle.net/10150/291356.

Full text

Abstract:

A novel bar code scanner that uses plane diffraction gratings on a flat rotating disk as the means of flying-spot laser scanning is designed and implemented. The design incorporates diffraction gratings that provide large angles of diffraction so that the lines generated in the bar code target region have sufficiently large radii for scanning most bar codes. The rotational symmetry exhibited by diffraction from plane gratings with incidence perpendicular to the grating surface is advantageous for the scanner system. The feasibility of the design is demonstrated by a prototype scanner consistin

APA, Harvard, Vancouver, ISO, and other styles

36

Sumit, Mohanty. "Fabrication and tracking of Artificial Bacterial Flagella using stereo holographic diffraction." Thesis, KTH, Skolan för elektro- och systemteknik (EES), 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-200937.

Full text

Abstract:

The emerging eld of mobile microrobotics has been suggestive of a plethora ofapplications, from intelligent micromanipulation to diversifying the prospects ofminimally invasive surgeries. Several designs of microrobots have been proposedand are being notoriously studied to enhance the knowledge of their behaviorin dierent environments to cater such applications. At present, control andsurveillance of these microrobots have been aided by the convergence of varioustechnologies like magnetic actuation, microscopy and computer vision. Thequintessential knowledge of their maneuverability could prov

APA, Harvard, Vancouver, ISO, and other styles

37

CORNIER-QUIQUANDON, MARIANNNE. "Theorie dynamique de la diffraction des electrons rapides par les cristaux et quasicristaux." Paris 6, 1988. http://www.theses.fr/1988PA066167.

Full text

Abstract:

Description de la diffraction des electrons par les solides ordonnes a longue distance. Le formalisme necessite d'exprimer l'hamiltonien de diffraction sur une base discrete d'ondes planes. Le spectre des etats propres de l'hamiltonien de diffraction est dense non uniforme. Les calculs dynamiques peuvent donc etre effectues en echantillonant le spectre par valeurs discretes. Application de la methode a la simulation des images de microscopie electronique en haute resolution sur une phase icosaedrique en utilisant la description 6d de la structure. Interpretation des resultats experimentaux par

APA, Harvard, Vancouver, ISO, and other styles

38

何永健 and Wing-kin Ho. "The (3x3) reconstruction of SIC(0001): a low energy electron diffraction study." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1998. http://hub.hku.hk/bib/B31215300.

Full text

APA, Harvard, Vancouver, ISO, and other styles

39

Mok, Cheuk-wai. "Comparing electron and positron scattering factors for applications in diffraction and holography /." Hong Kong : University of Hong Kong, 1997. http://sunzi.lib.hku.hk/hkuto/record.jsp?B18716337.

Full text

APA, Harvard, Vancouver, ISO, and other styles

40

Penny, George B. S. "High-pressure synthesis of electronic materials." Thesis, University of Edinburgh, 2010. http://hdl.handle.net/1842/4161.

Full text

Abstract:

High-pressure techniques have become increasingly important in the synthesis of ceramic and metallic solids allowing the discovery of new materials with interesting properties. In this research dense solid oxides have been synthesised at high pressures, and structural investigations have been conducted using x-ray and neutron diffraction. The perovskite LaPdO3 has been synthesised at pressures of 6{10GPa. Neutron diffraction studies have been carried out from 7{260K to investigate any structural distortions, particularly related to the possibility of charge order at low temperatures. No reduct

APA, Harvard, Vancouver, ISO, and other styles

41

Kaufmann, Martin. "Electron Diffraction Studies of Unsupported Antimony Clusters." Thesis, University of Canterbury. Physics and Astronomy, 2006. http://hdl.handle.net/10092/1269.

Full text

Abstract:

This thesis contains two main parts: the first part focusses on an electron diffraction study on unsupported antimony (Sb) clusters, while in the second part the design and development of a time-of-flight mass spectrometer (TOFMS) is discussed. Electron diffraction is an ideal tool to study the structure of clusters entrained in a beam. The main advantage of this technique is the ability to study the clusters in situ and in an interaction-free environment. It is therefore not necessary to remove the particles from the vacuum system which would lead to oxidation. Since the particles do not

APA, Harvard, Vancouver, ISO, and other styles

42

Genetu, Teggen Linda. "Material identification using X-ray diffraction." Thesis, Mittuniversitetet, Institutionen för elektronikkonstruktion, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:miun:diva-37122.

Full text

Abstract:

This study reviews the theoretical and experimental aspects of the X-ray diffraction (XRD) technique and evaluates its use in identifying toxic elements or compounds in waste that has been incinerated. Many industries incinerate materials that contain large significant amounts of toxic elements, and these elements should be identified and re-moved to reduce environmental pollution. The aim of this project is to identify the elemental content of an incinerated ash sample, and to recommend a proper identification method when using XRD. Here, we test two ash samples (raw ash without any treatment

APA, Harvard, Vancouver, ISO, and other styles

43

Siddiqui, Muhammad Saad, and Tahseen Iqbal. "Development of PDI plates for Industrial Applications." Thesis, Högskolan i Halmstad, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-13913.

Full text

Abstract:

The aim of this Master’s Degree thesis project is to design and develop point diffraction interferometer plates. In this project the PDI plates are re-designed, changing the design which was used in previous projects in Halmstad University. The transparency of PDI plates can be controlled by coating them with NiCr film. Firstly, four plates with coating of different thickness of NiCr were developed. The relationship between transmittance and the thickness of NiCr was established by testing these plates for transmittance and reflectance with the help of a laser and an optical power meter. The a

APA, Harvard, Vancouver, ISO, and other styles

44

Karhade, Omkar. "Scanning micro interferometer with tunable diffraction grating for low noise parallel operation." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2009. http://hdl.handle.net/1853/28142.

Full text

Abstract:

Thesis (M. S.)--Mechanical Engineering, Georgia Institute of Technology, 2009.<br>Committee Chair: Degertekin, Levent; Committee Co-Chair: Kurfess, Thomas; Committee Member: Adibi, Ali; Committee Member: Danyluk, Steven; Committee Member: Hesketh, Peter.

APA, Harvard, Vancouver, ISO, and other styles

45

St, Quintin Andra. "Electron beam lithography of a diffractive element for surface plasmon resonance sensing." Thesis, McGill University, 2013. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=114573.

Full text

Abstract:

Surface plasmon resonance (SPR) sensing is seen as a viable option for developing biological sensors that provide portable, real-time, integrated detection systems. Certain implementations of this sensing technique have already been commercialized, but there is a continued trend to provide systems that are ever-more compact and integrated. In accordance with this trend, previous work has designed a multi-channel SPR device which relies on diffractive lenses to couple light to and from its sensing spots. This thesis presents the development of a fabrication process for these lenses using electr

APA, Harvard, Vancouver, ISO, and other styles

46

Rohwer, Andrea Berenike. "Introducing organic molecular crystals into ultrafast electron diffraction." Thesis, Stellenbosch : Stellenbosch University, 2014. http://hdl.handle.net/10019.1/95819.

Full text

Abstract:

Thesis (MSc)--Stellenbosch University, 2014.<br>ENGLISH ABSTRACT: Organic molecular salts have a wide range of physical properties which can be chemically tailored by minor variations of their substituents. These characteristics include high degrees of anisotropy, electrical conductivity ranging from superconducting to insulating, and structural changes in the crystal lattice during first order phase transitions brought about by minimal changes in temperature, effective pressure, and in some cases even light. Hence, these materials are particularly interesting for the development of molec

APA, Harvard, Vancouver, ISO, and other styles

47

Hu, Hsiu-Lien. "Quantum transport of energetic electrons in ballistic nanostructures." Virtual Press, 2000. http://liblink.bsu.edu/uhtbin/catkey/1178341.

Full text

Abstract:

The various electronic phenomena of electrons in the quasi-one-dimensional semiconducotor heterostructures have been largely investigated in the past research, due to its importance both on the theoretical understanding and the design of nanodevices. In particular, most research is currently based on the GaAs-AIGaAs material system with a 2-DEG interface. From the study of Hua Wu, following the Bohm's interpretation of quantum mechanics, energetic electrons approximately approach the classical behavior. The goal of this theoretical study is to investigate how the flow of energetic electrons ma

APA, Harvard, Vancouver, ISO, and other styles

48

Suleiman, Aminat Oyiza. "Structural dynamics of 1T-TiSe2 using femtosecond electron diffraction." Thesis, Stellenbosch : Stellenbosch University, 2014. http://hdl.handle.net/10019.1/95990.

Full text

Abstract:

Thesis (MSc)--Stellenbosch University, 2014.<br>ENGLISH ABSTRACT: Trilayered transition metal dichalcogenides such as our sample (1T-TiSe2) have been studied for many years as systems with strong electron-electron and electron-phonon correlations. The main attraction to this family of compound is its potential to exhibit ground state phenomena known as charge density waves whose detailed physical origin has been controversially determined. In this study, we have used an ultrafast femtosecond laser based on a pump-probe technique, namely ultrafast electron diffraction, to investigate thes

APA, Harvard, Vancouver, ISO, and other styles

49

Chatelain, Robert P. 1982. "RF compression of electron bunches applied to ultrafast electron diffraction." Thesis, McGill University, 2008. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=111943.

Full text

Abstract:

The dynamics of atomic scale structures during structural change can be studied by Ultrafast Electron Diffraction (UED). The time resolution needed to reveal the fastest dynamics is 100 fs. Sub-angstrom structural resolution becomes possible with 1-1000 pC of charge necessary for diffraction pattern analysis during subtle structural changes. This combination of requirements cannot currently be realized due to the space-charge temporal broadening inherent to bunches of electrons of high fluence and short temporal duration. Simulations show that the incorporation of a specially designed Radio-Fr

APA, Harvard, Vancouver, ISO, and other styles

50

Jones, Daniel M. "A convergent beam electron diffraction study of some rare-earth perovskite oxides /." Connect to this title, 2007. http://theses.library.uwa.edu.au/adt-WU2008.0057.

Full text

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!