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Dissertations / Theses on the topic 'Novel devices'

Author: Grafiati

Published: 4 June 2021

Last updated: 11 February 2022

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1

Zhou, Kaichang. "Novel Electrowetting Display Devices." University of Cincinnati / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1248958684.

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2

Reddick, William Michael. "Novel silicon tunnelling devices." Thesis, University of Cambridge, 1997. https://www.repository.cam.ac.uk/handle/1810/251612.

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3

Huminiuc, Teodor. "Novel antiferromagnets for spintronic devices." Thesis, University of York, 2017. http://etheses.whiterose.ac.uk/18864/.

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Spin electronic or spintronic devices which are used in hard disk drive (HDD) read heads are expected to replace the current silicon based transistor technology used in volatile memories. A prime example for the net advantage of employing spin rather than electric charge manipulation is found in the newly developed magnetic random access memory (MRAM) which is proposed as a replacement for the dynamic random access memory (DRAM) based on three terminal metal-oxide-semiconductor (MOS) devices. Besides the decrease of energy consumption by a factor three arising from manipulating electron angula

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4

Emmerson, Gregory Daniel. "Novel direct UV written devices." Thesis, University of Southampton, 2003. https://eprints.soton.ac.uk/42435/.

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This thesis reports a series of developments based on UV writing of novel waveguide structures. The first section is an investigation into the production of Direct UV-written channel waveguides on the perimeter of a cylindrical substrate. Cylindrical waveguides were produced using variants of the Modified Chemical Vapour Deposition (MCVD) and Flame Hydrolysis Deposition for the fabrication of thin films on either surface of the cylinder. Three layer, buried waveguide structures were produced using three techniques, and channel waveguides Directly UV-written into one of the samples. The second

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5

Deng, Zhijie. "Novel optical devices for information processing." Texas A&M University, 2003. http://hdl.handle.net/1969.1/5863.

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Optics has the inherent advantages of parallelism and wide bandwidths in processing information. However, the need to interface with electronics creates a bottleneck that eliminates many of these advantages. The proposed research explores novel optical devices and techniques to overcome some of these bottlenecks. To address parallelism issues we take a specific example of a content-addressable memory that can recognize images. Image recognition is an important task that in principle can be done rapidly using the natural parallelism of optics. However in practice, when presented with incomplete

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6

Kieu, Khanh Quoc. "Novel Devices for Fiber Laser Application." Diss., The University of Arizona, 2007. http://hdl.handle.net/10150/193657.

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In this thesis, several novel devices for fiber laser are proposed and demonstrated. The first type of device is based on modal interference in non-adiabatic fiber tapers. Using such tapers, we demonstrate a simple technique to tune the wavelength of an all-fiber erbium-doped laser. Next, we systematically investigate the use of non-adiabatic fiber tapers for sensing purposes. As a result of this investigation, we have built and characterized several simple and sensitive sensors for highly accurate measurements of strain, temperature, and refractive index.Another class of devices investigated

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7

de, Souza Savita. "Digital watermarking and novel security devices." Thesis, De Montfort University, 2003. http://hdl.handle.net/2086/5847.

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This research is in the field of document security and the investigation of existing security devices. Security documents can be of two types; those that have commercial value, namely currency, articles of value and those that have legal value, namely, passports, identification cards etc. It is of vital importance in today's world, where fraud and counterfeiting are the order of the day, to protect any article or document of aesthetic importance and value. After the tragic events of September 11th 2001, security and the lack of security in every sense of the word is a much talked and researche

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8

Russell, Ben. "Modelling of novel opto-electronic devices." Thesis, University of York, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.444759.

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9

Hsieh, Pei-Shan. "IGBT design, modelling and novel devices." Thesis, University of Cambridge, 2015. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.708993.

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10

Choi, DongWoong. "Novel materials for energy storage devices." Thesis, University College London (University of London), 2018. http://discovery.ucl.ac.uk/10045888/.

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11

Andreakou, Peristera. "Hybrid nanomaterials for novel photonic devices." Thesis, University of Southampton, 2012. https://eprints.soton.ac.uk/347152/.

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This PhD thesis investigates the optical properties of colloidal semiconductor nanocrystals and evaluates concepts regarding the development of novel photonic devices. Spectroscopic studies of the exciton dynamics in colloidal lead sulfide (PbS) quantum dots (QDs) by tuning the temperature are presented. The lowest exciton splitting for a range of PbS QDs sizes is calculated and a transfer of the oscillator strength from dark to bright states as the size increases is demonstrated. Hybrid structures with PbS QDs deposited on silicon substrates were also studied in order to explore whether excit

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12

Smith, Helen. "Novel organic materials for photovoltaic devices." Thesis, University of Glasgow, 2014. http://theses.gla.ac.uk/5859/.

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Organic materials offer key advantages over their inorganic counterparts for photovoltaics due to the ability to easily tune the physical properties and develop cheaper, more flexible, photovoltaic devices. This thesis describes the synthesis and characterisation of a variety of compounds from small-molecule to supramolecular and polymeric systems with the potential to be used in organic electronics. Herein is described an optimised synthetic route for the synthesis of two flavins and the synthesis and characterisation of a novel flavin and fluorene polymer. Also described is the synthesis of

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13

Chen, Feng. "Ferroelectric electron emission induced by high voltage polarization switching." Thesis, University of Oxford, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.275328.

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14

Stevenson, Paul. "Novel plasma sources for the plasma opening switch." Thesis, Loughborough University, 2002. https://dspace.lboro.ac.uk/2134/13632.

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The plasma opening switch (POS) is used in pulsed power systems where a fast opening and very high current switch is required. Plasma is injected into the switch, which carries a large conduction current before it opens in a process that lasts for a few nanoseconds and transfers the current to a parallel-connected load The conduction and opening times of the switch are dependent on the plasma parameters such as distribution, speed, temperature and species, which are all determined by the plasma source. This thesis begins with a description of the POS, with its conduction and opening mechanisms

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15

Holcroft, B. "Novel electronic devices incorporating Langmuir-Blodgett films." Thesis, University of Oxford, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.235171.

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16

Bhuwalka, Krishna K. "Novel tunneling devices for future CMOS technologies." [S.l.] : [s.n.], 2006. http://deposit.ddb.de/cgi-bin/dokserv?idn=980688434.

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17

Persson, Stefan. "Modeling and characterization of novel MOS devices." Doctoral thesis, KTH, Microelectronics and Information Technology, IMIT, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3720.

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<p>Challenges with integrating high-κ gate dielectric,retrograde Si<sub>1-x</sub>Ge<sub>x</sub>channel and silicided contacts in future CMOStechnologies are investigated experimentally and theoreticallyin this thesis. ρMOSFETs with either Si or strained Si<sub>1-x</sub>Gex surface-channel and different high-κgate dielectric are examined. Si<sub>1-x</sub>Gex ρMOSFETs with an Al<sub>2</sub>O<sub>3</sub>/HfAlO<sub>x</sub>/Al<sub>2</sub>O<sub>3</sub>nano-laminate gate dielectric prepared by means ofAtomic Layer Deposition (ALD) exhibit a great-than-30% increasein current drive and peak transconduc

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18

Murray, James Thomas. "Novel devices and techniques in nonlinear optics." Diss., The University of Arizona, 1996. http://hdl.handle.net/10150/187519.

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A novel nonlinear frequency conversion technique based on intracavity stimulated Raman scattering in solid-state media is discussed. Devices have been built which are based on this technique. Standard first-order resonator eigenmode routines as well as paraxial diffraction-propagation, laser gain and nonlinear conversion routines have been integrated into a generalized laser resonator design software package which can accurately model the growth and evolution of the transverse field distribution in arbitrary intra- or extra-cavity nonlinear frequency converted laser sources. This package has b

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19

Richards, Gary J. "Novel organic materials for electroluminescent display devices." Thesis, University of Hull, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.342862.

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20

Jennings, Michael Robert. "Novel Contact Formation for 4H-SiCPower Devices." Thesis, University of Warwick, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.504862.

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SiC is seen as the material of choice for the next generation of power semiconductor devices because of its potential to deliver high power densities whilst maintaining high efficiency levels. The novel contact formation examined in this· thesis is aimed at improving the robustness and ohmicity of contacts to 4H-SiC. Innovative triple and multiple metallisations based on a combination of Al/Ti and Al/Ni layers have been fabricated, which are aimed at reducing the contact resistance and improving the contact morphology to p-type 4H-SiC. The lowest specific contact resistivity obtained was based

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21

Jollivet, Clemence. "Specialty Fiber Lasers and Novel Fiber Devices." Doctoral diss., University of Central Florida, 2014. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/6295.

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At the Dawn of the 21st century, the field of specialty optical fibers experienced a scientific revolution with the introduction of the stack-and-draw technique, a multi-steps and advanced fiber fabrication method, which enabled the creation of well-controlled micro-structured designs. Since then, an extremely wide variety of finely tuned fiber structures have been demonstrated including novel materials and novel designs. As the complexity of the fiber design increased, highly-controlled fabrication processes became critical. To determine the ability of a novel fiber design to deliver light w

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22

Young, Sue Y. "Characterization of novel III-V semiconductor devices." Thesis, Massachusetts Institute of Technology, 2006. http://hdl.handle.net/1721.1/37094.

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Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2006.<br>Includes bibliographical references (p. 68-69).<br>This thesis presents the characterization of tunnel junctions and tunnel-junction-coupled lasers. The reverse-biased leakage current in a tunnel junction can be exploited to tunnel electrons from the valence band of one active region to the conduction band of a second active region. Thus, tunnel-junction-coupled lasers are highly efficient as they allow electrons to stimulate the emission of photons in more than one active re

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23

Pathirana, Gamarachchi Pathiranage Vasantha. "Novel lateral power devices on insulating substrates." Thesis, University of Cambridge, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.613830.

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24

Chai, Zheng. "Characterisation of novel resistive switching memory devices." Thesis, Liverpool John Moores University, 2017. http://researchonline.ljmu.ac.uk/6937/.

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Resistive random access memory (RRAM) is widely considered as a disruptive technology that will revolutionize not only non-volatile data storage, but also potentially digital logic and neuromorphic computing. The resistive switching mechanism is generally conceived as the rupture/restoration of defect-formed conductive filament (CF) or defect profile modulation, for filamentary and non-filamentary devices respectively. However, details of the underlying microscopic behaviour of the resistive switching in RRAM are still largely missing. In this thesis, a defect probing technique based on the ra

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25

Abernethy, Joyce Anne. "Novel devices in periodically poled lithium niobate." Thesis, University of Southampton, 2003. https://eprints.soton.ac.uk/15473/.

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This thesis describes the research carried out to develop several novel periodically poled lithium niobate (PPLN) devices. These devices exploit the ability to invert micro-domains of spontaneous polarisation in ferroelectrics such as lithium niobate. The fabrication of PPLN devices is described and extensive studies into factors influencing the poling quality are presented. In particular a comparison of material properties of unprocessed lithium niobate material from a range of different suppliers is carried out. Several novel PPLN devices are reviewed and two main devices are investigated -

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26

Middendorf, John Raymond. "Novel Devices and Components for THz Systems." Wright State University / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=wright1400252710.

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27

Al-Amer, Itihad Abd Al-Hameed Abd. "A stable doubly-fed machine with novel rotor design." Thesis, Queen's University Belfast, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.335349.

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28

Thong, Yee Keat. "A novel computer interface tool using low cost inertial sensors." Thesis, University of Nottingham, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.246360.

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29

Wong, J. N. H. "Novel techniques for improving the performance of MESFET power amplifiers." Thesis, University of Surrey, 2003. http://epubs.surrey.ac.uk/843448/.

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This thesis describes the research activities that have been investigated for improving the 3rd order intermodulation distortion products (IM3) and power added efficiency (PAE) and bandwidth performance of microwave GaAs MESFET power amplifiers. Two novel circuit techniques, one for improving the 3dB bandwidth performance and the other for improving the IM3 and PAE performance, were proposed and verified through simulation and practical measurements. The technique of including lumped elements matching networks within the package encapsulation (Close-to-Chip lumped element matching) of a 2GHz M

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30

Udrea, Florin. "Novel MOS-gated bipolar device concepts towards a new generation of power semiconductor devices." Thesis, University of Cambridge, 1996. https://www.repository.cam.ac.uk/handle/1810/265438.

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Research in MOS-gated power semiconductor devices with combined bipolarlVIOS action has been motivated by the continuous industrial need for highly efficient devices with reduced power losses and high impedance gate control. The Insulated Gate Bipolar Transistor (IGBT) and the IVIOS Controlled Thyristor (MCT) have been among the first :tvIOS-gated bipolar devices with high blocking capability and reduced on-state power losses. Presently these devices are fabricated using the conventional DIVIOS technology. Recently, a new technology, trench technology, has emerged in the field of low voltage p

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31

Tian, Zhaobing. "Novel optical fiber devices for emerging optical applications." Thesis, McGill University, 2013. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=114472.

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With dramatically increasing internet bandwidth, electrons as information carriers are being continually replaced with photons. This exchange has been fully completed in the long-haul high-speed backbone network, now occurs in short-reach data centers and radio frequency communications, and eventually will reach the chip level. Various emerging optical technologies have been developed during this time; with performance and cost being the two major factors to be considered for these technologies. In this work, we propose and design several novel optical fiber devices to enhance the performance

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32

Texidó, Bartes Robert. "Novel electronic stretchable materials for future medical devices." Doctoral thesis, Universitat Ramon Llull, 2017. http://hdl.handle.net/10803/402945.

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L’electrònica convencional basada en el silici te grans dificultats a l’hora de ser implementada en dispositius electrònics que estiguin en contacte amb les corbes i las plasticitat dels teixits del cos humà. Futures aplicacions mèdiques como la pell electrònica, sistemes de alliberació de fàrmac transdèrmic o nous bio-sensors requereixen de sistemes electrònics capaços de ser doblegats, retorçats o enrotllats en superfícies corbes. Tot i els prometedors resultats mostrats por la investigació en electrònica flexible, no hi ha aplicacions comercials directes dins de l’àrea mèdica. La dependènc

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33

Yang, Rusen. "Oxide nanomaterials synthesis, structure, properties and novel devices /." Diss., Available online, Georgia Institute of Technology, 2007, 2007. http://etd.gatech.edu/theses/available/etd-06212007-161309/.

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Thesis (Ph. D.)--Materials Science and Engineering, Georgia Institute of Technology, 2008.<br>Peter J. Hesketh, Committee Member ; Zhong Lin Wang, Committee Chair ; C.P. Wong, Committee Member ; Robert L. Snyder, Committee Member ; Christopher Summers, Committee Member.

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34

Ohbi, Daljit Singh. "Novel Elastomer Compositions for Medical Drug Delivery Devices." Thesis, University of Bolton, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.494268.

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35

Dougall, Ewan A. "Investigation of oxygen transfer in novel medical devices." Thesis, University of Strathclyde, 2011. http://oleg.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=16796.

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36

Kleemann, Hans. "Organic Electronic Devices - Fundamentals, Applications, and Novel Concepts." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2014. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-105059.

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This work addresses two substantial problems of organic electronic devices: the controllability and adjustability of performance, and the integration using scalable, high resolution patterning techniques for planar thin-film transistors and novel vertical transistor devices. Both problems are of particular importance for the success of transparent and flexible organic electronics in the future. To begin with, the static behavior in molecular doped organic pin-diodes is investigated. This allows to deduce important diode parameters such as the depletion capacitance, the number of active dopan

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37

Penty, Richard Vincent. "Novel optical fibre Kerr devices for signal processing." Thesis, University of Cambridge, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.291606.

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38

Stienen, A. H. A. "Development of novel devices for upper-extremity rehabilitation." Enschede : University of Twente [Host], 2008. http://doc.utwente.nl/60511.

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39

Ring, Josh. "Novel fabrication and testing of light confinement devices." Thesis, University of Manchester, 2016. https://www.research.manchester.ac.uk/portal/en/theses/novel-fabrication-and-testing-of-light-confinement-devices(51572720-0c49-482e-8523-e44ca877117f).html.

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The goal of this project is to study novel nanoscale excitation volumes, sensitive enoughto study individual chromophores and go on to study new and exciting self assemblyapproaches to this problem. Small excitation volumes may be engineered using light con-finement inside apertures in metal films. These apertures enhance fluorescence emissionrates, quantum yields, decrease fluorescence quenching, enable higher signal-to-noiseratios and allow higher concentration single chromophore fluorescence, to be studied byrestricting this excitation volume. Excitation volumes are reported on using the ch

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40

Bushell, Zoe L. "Development of novel infrared photonic materials and devices." Thesis, University of Surrey, 2017. http://epubs.surrey.ac.uk/841718/.

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This thesis investigates a range of novel photonic devices and their constituent semiconductor materials with emission in the infrared (IR) region of the spectrum. These have a variety of potential applications, including in telecoms, sensing and defence systems. Studies focus on aspects of the electronic and photonic band structures, and how these impact upon device performance. Type-II interband cascade lasers and LEDs emitting in the mid-IR region of 3 – 4 μm are characterised using temperature and hydrostatic pressure dependent techniques. The key finding is that the threshold current dens

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41

Klasner, Scott A. "Novel capillary and microfluidic devices for biological analyses." Diss., Manhattan, Kan. : Kansas State University, 2010. http://hdl.handle.net/2097/3747.

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42

Cariello, Michele. "Synthesis of novel organic semiconductors for optoelectronic devices." Thesis, University of Glasgow, 2016. http://theses.gla.ac.uk/7805/.

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This thesis describes the synthesis and characterisation of novel conjugated organic materials with optoelectronic application. The first chapter provides an introduction about organic semiconductors and in particular about their working principle from a physical and chemical point of view. An overview of the most common types of solar cells is provided, including examples of some of the best performing materials. The second chapter describes the synthesis of a new library of flavin derivatives as potential active materials for optoelectronic applications. Flavins are natural redox-active mole

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43

Dong, Liang. "Novel optical fibre devices based on MCVD method." Thesis, University of Southampton, 1992. https://eprints.soton.ac.uk/404723/.

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In this thesis, several new optical fibre devices are described. These devices are based on fibres with special structures or materials, fabricated by the MCVD technique. Light propagation and intermodal coupling in twin-core (TC) fibres are investigated both theoretically and experimentally. A cascaded TC fibre filter is demonstrated and so are TC fibre intermodal couplers using both mechanical gratings and fibre acoustic flexural waves, which can be used as filters, wavelength-division multiplexing (WDM) taps and frequency shifters. Photosensitivity in both transition-metal-doped fibre and c

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44

Gawith, Corin B. E. "Novel active waveguide devices in direct-bonded structures." Thesis, University of Southampton, 2002. https://eprints.soton.ac.uk/15488/.

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This thesis describes a series of experimental studies on the use of direct bonding for optical waveguide fabrication. The direct bonding technique involves contacting two ultra-clean polished surfaces to form an adhesive-free vacuum-tight bond. Optical materials bonded in this way can be formed into waveguide devices, and this work extends direct bonding to include periodically poled materials and a new solid-state ion-exchange process. The first result of this work describes the fabrication of a 5.5-mm-long, 12-µm-thick periodically poled LiNbO3 planar waveguide buried in LiTaO3. Frequency d

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45

Peacock, Anna Claire. "Applications of light propagation in novel photonic devices." Thesis, University of Southampton, 2004. https://eprints.soton.ac.uk/42429/.

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In this thesis, the propagation of light in novel photonic devices has been studied theoretically, numerically and experimentally. In particular, self-similar solutions to the nonlinear Schrödinger equation have been investigated as a means of avoiding distortions associated with high power pulse propagation in optical fibres. The results show that it is the interplay between the nonlinear and dispersive effects that leads to stable formation of the self-similar solutions. By considering generalised nonlinear Schrödinger equations we have extended the previous investigations of linearly chirpe

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46

Balakrishnan, Nilanthy. "Novel approaches to the fabrication of nanoscale devices." Thesis, University of Nottingham, 2015. http://eprints.nottingham.ac.uk/50598/.

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This thesis describes the effects of a post-growth hydrogenation on as-grown samples and device structures based on III-N-V and III-V semiconductor compounds. The spectral response of quantum wells (QWs) or superlattices (SLs) are tuned by the control dissociation of N-H complexes using a focused laser beam (photon assisted dissociation) or by thermal annealing. These approaches could be implemented in other materials and heterostructure devices, and offer the advantage of enabling an accurate control of the spectral response of a device using a layer compound with a single N- concentration. A

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47

Hung, Ting-Hsiang. "Novel High-k Dielectric Enhanced III-Nitride Devices." The Ohio State University, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=osu1437684419.

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48

Kawahara, Jun. "Novel architectures for flexible electrochemical devices and systems." Doctoral thesis, Linköpings universitet, Institutionen för teknik och naturvetenskap, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-91273.

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Electrically conducting polymers were discovered in the late 1970s. This finding generated a whole new research area named organic electronics, an area which has attracted great interest and tremendous achievements, in terms of devices and applications, have been reached by different research groups all over the world. Replacing inorganic materials by their organic counterparts in various kinds of electronic devices provides novel device functionalities as well as new opportunities in device manufacturing. One of the major advantages of utilizing organic materials in electronic devices is the

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49

Jiang, Zhe. "Novel nanowire structures and devices for nanoelectronic bioprobes." Thesis, Harvard University, 2015. http://nrs.harvard.edu/urn-3:HUL.InstRepos:17467307.

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Semiconductor nanowire materials and devices provide unique opportunities in the frontier between nanoelectronics and biology. The bottom-up paradigm enables flexible synthesis and patterning of nanoscale building blocks with novel structures and properties, and nano-to-micro fabrication methods allow the advantages of functional nanowire elements to interface with biological systems in new ways. In this thesis, I will focus on the development of bottom-up nanoscience platforms, which includes rational synthesis and assembly of semiconductor nanowires with new capabilities, as well as design a

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50

Ng, Ka Fai. "Novel low power CAM architecture /." Online version of thesis, 2008. http://hdl.handle.net/1850/7771.

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