Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 28 for “"Transparent materials"”.
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Femtosecond laser writing in transparent materials
… new phenomenon in ultrafast laser processing of transparent optical materials, in particular silica glass, manifested as a change in material modification by reversing the writing direction, is observed. The effect resembles writing with a quill pen and is interpreted in terms of new physical …
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Damages in Transparent Materials by Ultrashort Laser Pulse
… up a wide range of exciting applications from transparent material processing such as waveguide fabrication to bio applications such as cell ablation. The fundamental aspects of ultrashort pulse material interaction are still remaining an active research topic. Here, we focus on the …
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Study of inorganic transparent materials with near-infrared absorbing properties
… from the studies, three promising systems for transparent near-infrared absorbing pigment applications were isolated: (Zn,Cu)2P2O7, (Zn,Fe)3(PO4)2 and (Mg,Cu)2Si2O6 solid solutions
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Optical contrast between transparent materials through external modulation of the Faraday effect
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1998.
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Femtosecond laser micro-machining and consequent self-assembled nano-structures in transparent materials
… laser micro-machining within the bulk of transparent materials. Thanks to its unique properties, the femtosecond laser writing technique offers the potential for realizing three-dimensional multi-component photonic devices, fabricated in a single step and in a variety of transparent …
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Low coherence speckle interferometry (LCSI) for the characterisation of adhesive bonded joints
… of the behaviour of interfaces in transparent and semi-transparent materials. In this work theoretical background and basic principles of LCSI are described. The setup and the measurement algorithms are optimised. The contrast of the interference signal depends on the configuration …
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Governor's Island : designing the present through the past
… architecture which reveals the island's memory: transparent materials and a siting which relates to New York and military architecture. At these different scales, the past will be used to derive a new place from an old place.
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Lūžio rodiklio modifikavimas stikluose ir kristaluose veikiant ultratrumpaisiais lazerio impulsais /
The study on refractive index modification of transparent materials with ultrashort laser pulses is presented in this dissertation. Based on experimental data it was demonstrated, that using ultrashort pulses, generated with Yb:KGW laser system, it is possible to produce modified refractive index …
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Towards Direct Writing Of 3-d Photonic Circuits Using Ultrafast Lasers
… routes for fabrication of optical waveguides in transparent materials. In this thesis, the advantages and limitations of this technique are explored. Two extended-cavity ultrafast lasers were built and characterized as the laser sources for this study, with improved performance over existing …
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LumiModeling: A Gaussian Splatting-Based Tool for Recreating Dynamic Material and Lighting Interaction in Architecture
… particularly in rendering reflective and transparent materials. This work extends existing GS capabilities by implementing a relightable pipeline based on the existing model Relightable3DGaussian (Gao et al., 2023), in which each Gaussian point is augmented with physical parameters, …
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Structural colour in marine organisms: From nature to applications
… arising from the interaction of light with transparent materials featuring lengths comparable to visible wavelengths, is a fascinating phenomenon responsible for the appearance of many living organisms. Over the past few decades, such mechanism has been proposed to develop alternatives to …
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Analysis of rocks and minerals by attenuated total reflection with atlas
… methods. It is applicable for both opaque and transparent materials of thick or thin films. It is often requires no sample preparation.</p><p>This study of ATR of minerals involves the development of an atlas of mineral powder spectra and of mineral slab spectra, the comparison of the two sets …
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Learning to Segment Images Into Material and Object Classes
… material and object categories. With regards to materials we consider the difficult task of segmenting objects made of transparent materials such as glass. To do this we consider information in the form binary features. Unlike more traditional unary features which consider information contained …
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Characterization and optimization of photonic devices fabricated using femtosecond laser micro-matching
… in the area of femtosecond micromachining of transparent materials. It promises to be a powerful technique for rapid fabrication of photonic devices in three dimensional geometries. Our group has fabricated and investigated an array of two dimensional and novel three dimensional photonic …
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Bangolaidžių integravimas į lydytą kvarcą panaudojant femtosekundinius šviesos impulsus /
Nowadays ultrafast laser micromachining of transparent dielectrics, such as fused silica, is becoming one of the most promising and intriguing areas of photonics. One of the key factors owing to this, is the unique property of this type of radiation to induce refractive index changes, when focused …
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Forster Resonance Energy Transfer in materials used in Luminescent Solar Concentrators
… LSCs with solar cells. They are made up of transparent materials like glass or poly-methyl methacrylate mixed with a dye. The dye molecule absorbs incident radiation and emits fluorescence. Total internal reflection of the emitted fluorescence, within the transparent material is guided to …
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Computational control of laser systems for micro-machining
… geometry, laser-microfabricated structures in transparent materials have applications in telecommunications, microfluidics, micro-sensors, data storage, glass cutting and decorative marking applications. The relations of Nd:YV04 and C02 laser system parameter settings to the dimensions and …
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Optical low coherence reflectometery for morphological characterization of static and dynamic systems
… the 1.3 micron source beam.Unlike in the case of transparent materials, in nonuniform and scattering matrices light undergoes numerous scattering events. During each of these events, wave packets of light may change their direction of propagation as well as their phase properties. OLCR is designed …
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Characterization of residual stresses in birefringent materials applied to multicrystalline silicon wafers
Birefringence has been used to study transparent materials since 1815, and is based on the decomposition of a polarized ray of light into two distinct rays when passing through an optically anisotropic material. This thesis uses this phenomenon in a study of phase retardation in crystalline …
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