The subject of this thesis is the study of the Laser Induced Forward Transfer (LIFT) technique with femtosecond duration pulses. In principle, femtosecond-LIFT should offer a number of advantages over traditional nanosecond-LIFT in terms of achievable resolution and transferring…
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This thesis investigates two variations of the conventional pulsed laser deposition (PLD) technique. The first technique is femtosecond PLD, whereby the laser used to ablate the target has a significantly higher peak intensity and shorter pulse duration as compared to convention…
The need for a solid state broadband modulator that is efficient and compact, to replace the functionality of mechanical choppers used to modulate pyroelectric detector signals, has existed for some time. Systems where mechanical solutions are undesirable, especially when there …
This thesis focuses on the potential of compound-glass, highly nonlinear, small-core fibres for use in nonlinear applications. Both fibres with a conventional step-index design and small-core holey fibres are considered. While the former technology is more mature, the latter rep…
The Optical Fibre Nanowire (OFN) is a potential building block in future micro- and nano-photonic device since it offers a number of unique optical and mechanical properties. In this thesis, the background and fundamental features of nanowires are introduced; the theory, design …
Wireless Sensor Networks (WSN) represent a relatively modern concept which has captured the interest of many in the research community. Coupled with appropriate hardware, they offer great flexibility in terms of their applicability to solving real world problems. This can be see…
As high-k dielectrics are introduced into commercial Si CMOS (Complimentary Metal Oxide Semiconductor) microelectronics, the 40 year channel/dielectric partnership of Si/SiO2 is ended and the door opened for silicon to be replaced as the active channel material in MOSFETs (Metal…
Spatial impression in both concert halls and reproduced sound has been identified as an important attribute of the listening experience. In this study, the synthesis and objective measurement of spatial impression in reproduced sound is examined. A novel, multichannel spatializi…
As high-temperature superconductor technology approaches commercial applications, for example superconducting magnetic energy storage, superconducting fault current limiters, and superconducting rotary machines for marine propulsion, it is timely to consider the possibility of i…
Granular materials are important for many different disciplines, e.g. geomechanics, civil engineering and chemical engineering. Many approaches have been used to model their behaviour, but one of the best and most important is the Discrete Element Method (DEM). The DEM was first…
Ocean acoustic tomography (OAT) is a method for mapping the physical characteristics of the world’s oceans. This technique enables the properties of a region of ocean – its temperatures, salinities, densities, and current speeds – to be inferred by measuring the propagation time…
This thesis focuses on multimodal interactions for the design of a learning environment. The process of designing such systems involves studying the benefits of multimodal interactions in learning. Therefore, it analyses the structure of the interactive space between the learner…
The Class E power amplifier has very high drain efficiency under quasi-static conditions, and is a good candidate for Envelope Elimination and Restoration (EER) or other polar techniques. Unfortunately it has an unusual carrier frequency response, for which no analytic expressio…
Both the experimental and the modelling techniques have been investigated and used to investigate factors that influence the formation, quality and reliability of electronic packaging interconnections formed using solder alloys and anisotropic conductive films (ACFs). The wettin…
Most of the analysis techniques available for planning and operation of multiphase power systems are based upon the assumption that the network operates under perfectly balanced conditions. The advantage of this assumption from the modelling view point is that only one phase of …
This thesis describes the development of novel microstructured optical fibres (MOFs), namely holey optical fibres (HFs), based on a commercial highly nonlinear non-silica glass: By taking the advantages of the zero dispersion of the HFs at 1 μm and 1.55 μm, the SC studies are ca…
The increasing demand for greater storage densities poses constant challengesfor the magnetic recording industry. The move to perpendicularrecording occurred recently as this provides one·way of increasing thestorage density. For further advance in the techriology it is impor…
In this work we present an analysis of gas sensors based on correlation spectroscopy with a Fabry-Perot interferometer (FPI). In this technique the spectral FPI transmission fringe pattern is matched with ro-vibrational absorption lines. To produce the cross correlation principl…
In this thesis I investigate aspects of dispersion controlled high nonlinearity all silica holey fibre, including design, fabrication, sample applications, and modelling. The latest work has been focussed on controlled structural variation of holey fibres along their length to o…