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.
Results
Showing 1 to 20 of 21 for “"non linear optics"”.
-
Probing electrochemical functionality on the nanoscale via current detection approaches
… lithium niobate, which has applications in non-linear optics and wave-guiding technologies.
-
An investigation of optical properties in active and passive nanophotonic devices
… (SOI) nano waveguides. Systematic research of non-linear optics in silicon is conducted, which paves the way for numerical simulation and further guides the design of SOI chips. Besides, corresponding fibre-to-chip coupling solutions are also proposed based on numerical simulation. The designed …
-
Novel Carbazole Based Methacrylates, Acrylates, and Dimethacrylates to Produce High Refractive Index Polymers
… applications in dentistry, microelectronics, and optics, including optical eye wear, fiber optics, and non-linear optics, such as holography. Carbazole based polymers have demonstrated good optical, photo-refractive, and charge-transporting properties, combined with ease of processing. The …
-
Nano-engineering of Atomically Thin Novel 2D Materials and Their Heterostructures
… moire heterostructures. This results in enhanced non-linear light matter interactions and magnetic properties. Then the dissertation focuses on using advanced nitrogen vacancy (NV) magnetometer to characterize 2D magnets, followed by analysis of light matter interaction in novel hybrid …
-
Nano-engineering of Atomically Thin Novel 2D Materials and Their Heterostructures
… moire heterostructures. This results in enhanced non-linear light matter interactions and magnetic properties. Then the dissertation focuses on using advanced nitrogen vacancy (NV) magnetometer to characterize 2D magnets, followed by analysis of light matter interaction in novel hybrid …
-
Synthesis and photo-response study on GaSe and InSe atomic layers
… in the area of photo-sensing, photo-voltage, non-linear optics, etc. The atomically layered GaSe and InSe may exhibit unique optical and electrical properties. In this study, GaSe single atomically layered crystal was grown by vapor phase transport method, InSe atomically layered flakes were …
-
Strong-field physics with ultrafast optical resonators
… In this strong-field regime, conventional non-linear optics gives way to novel phenomena such as the production of attosecond bursts of electrons and photons. Strong laser fields are generally achieved with amplified, ultrafast laser pulses. In this thesis we explore phenomena unique to …
-
Degradation studies on different pigments and binders: new approaches to diagnostics in cultural heritage
… case of San Giovanni white with the help of a non-invasive technique (Raman spectroscopy), and the characterization of the degradation path and individuation of the respective alteration products in the case of Red vermilion and Cd-pigments, always favouring the choice of a non-destructive …
-
Synthesis, non-linear optical and electrochemical properties of novel organoimido polyoxometalate derivatives
… chromophores for use in second-order non-linear optics (NLO): organoimido polyoxometalates (POMs). It presents the first experimental measurements of 2nd order NLO (frequency doubling) coefficients (β) (by hyper-Rayleigh scattering, HRS) and the first spectroelectrochemical …
-
Synthesis of mixes ligand metal-organic frameworks for sorption studies
… storage and separation, luminescence, catalysis, non-linear optics as well as magnetism. The first part of this study describes the synthesis and characterisation of five pyridyl N-donor diimide ligands namely; N,N-bis(pyridin-3-ylmethyl)naphthalene diimide (L1), N,N-bis(pyridin-4-ylmethyl) …
-
Development of porous metal-organic frameworks for gas adsorption applications
… in gas storage, separations, catalysis, sensors, non-linear optics, displays and electroluminescent devices. They are synthesized in a "building-block" approach by self-assembly of metal or metal-oxide vertices interconnected by rigid linker molecules. The highly ordered nature of MOF materials …
-
Molecular Engineering of Dipolar and Octupolar Non-Linear Optical Materials for Next-Generation Telecommunications
… their fast optical response times, and superior non-linear optical susceptibilities, relative to their traditional inorganic counterparts. While dipolar molecules dominate the field of organic non-linear optical (NLO) materials, octupolar molecules have the potential to produce far greater NLO …
-
SYNTHESIS OF POLYMER STRUCTURES FOR INCREASING ENERGY CONVERSION IN SOLAR CELLS
… to industry. Based on geometric and wave optics, two simple-integrated and scalable techniques to improve the energy conversion of solar cells are developed. The first method is to make a v-groove structure on the encapsulant, which is able to guide light to the absorption surface, rather …
-
Probing Random Media With Singular Waves
… occurred. Many applications in various areas of linear and non-linear optics have been based on studying effects related to angular momentum and optical vortices. This dissertation examines the use of such wave singularities for studying the light propagation in highly inhomogeneous media and the …
-
NEW ORGANOMETALLIC COMPLEXES WITH PHOTOLUMINESCENT AND NON LINEAR OPTICAL PROPERTIES
… of attention as chromophores for second-order nonlinear optical (NLO) applications, because they may offer a great diversity of tunable electronic properties by virtue of the metal centre. We have investigated the NLO response of new push-pull anellataed hemicyanine ligands and their related …
-
Towards optical quantum communication in space
"To build a global quantum communication network, low-transmission, fiber-based communication channels can be supplemented by using a free-space channel between a satellite and a ground station on Earth. To this end, we have developed a system that generates hyperentangled photonic ""ququarts'' and …
-
Synthese von TiO2-Nanopartikeln und Carbazol-Farbstoffderivaten für optische Anwendungen in anorganisch-organischen Hybridpolymeren
… als Photosensibilisatoren > Optisch nichtlineare Chromophore > Struktur-Eigenschafts-Beziehungen in hybriden Materialien > Photoleitung > Optische Nichtlinearität
-
Frequency-resolved ultrafast dynamics of phonon polariton wavepackets in the ferroelectric crystals LiNbO₃ and LiTaO₃
… enables to study the selective excitation of phonon polaritons. These quasi-particles arise from the coupling of electro-magnetic waves and transverse optical lattice modes, the so-called phonons. The phonon polaritons were investigated in the optically non-linear, ferroelectric crystals LiNbO₃ …
-
Phase-Matching Optimization of Laser High-Order Harmonics Generated in a Gas Cell
Ten-millijoule, thirty-five femtosecond, 800 nm (~40 nm bandwidth) laser pulses are used to study high-order harmonic generation in helium- and neon-filled gas cells of various lengths. Harmonic orders in the range of 50 to 100 are investigated. A semi-infinite cell geometry produces brighter …
-
Quantum Chemical Studies for the Engineering of Metal Organic Materials
… we study the gas adsorption, color change, and non-linear optical properties of MOMs. These properties can be predicted using theoretical methods, and the results may provide experimentalists with guidance for rational design and engineering of novel MOMs. The theory levels used include …
Page 1 of 2