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 49 for “"plasmonic nanostructures"”.
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Non-traditional catalysis by plasmonic nanostructures
… transformations. These systems include classical plasmonic noble metal nanoparticles and redox-active metal oxides with intriguing electronic properties, and these materials have been widely investigated for both thermocatalytic and photocatalytic applications, including CO2 reduction and …
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Transient Optical Picocavities Within Coupled Plasmonic Nanostructures
Plasmonic nanocavities, such as a nanometre scale gap between a gold nanoparticle and gold mirror (NPoM), confine light beyond the free space diffraction limit. While these enhanced field intensities allow resolvable measurements of vibrational scattering from only a few hundred molecules, ensemble …
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Complex Plasmonic Nanostructures: Symmetry Breaking and Coupled Systems
Metallic nanostructures support resonant oscillations of their conduction band electrons called localized surface plasmon resonances. Plasmons couple efficiently to light and have enabled a new class of technology for the manipulation of light at the nanoscale. Nanostructures that support plasmon …
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Refractory oxides based multilayered core@shell plasmonic nanostructures
Plasmonic devices have received a great deal of attention in the past decades due to their ability to concentrate electromagnetic radiations to sub-diffraction limited spots of the order of a few nanometers while enhancing the field intensity by a few orders of magnitudes. These remarkable …
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Self-assembled Plasmonic Nanostructures for Thin Film Photovoltaics
… the optical properties of self-assembled silver nanostructures fabricated on soda-lime glass by a solid-state dewetting (SSD) process, which consist in thermallyinduced morphology transformation from a thin lm to an array of islands or nanoparticles is reported. It is shown that four distinct …
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On the nature of SERS from plasmonic nanostructures
… QD SERS and identifies enhancement due to the plasmonic nanostructure. A gentle mechano-chemical process (carbon dioxide snow jet) is used to rearrange adsorbed organic thiol monolayers on a gold plasmonic nanostructure. The necessity of nanoscale roughness to the large SERS enhancement on …
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Plasmonic nanostructures and metamaterials for nanoscale light-matter interaction
… phenamena at nanoscale in the presence of plasmonic nanostructures and metamaterials. Using the principles of nano-optics, a range of plasmonic nanodevices are developped for molecular sensing, nonlinear optics and surface plasmon lasing. This theoretical and experimental investigation is …
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Large area plasmonic nanostructures design, fabrication and characterization by laser
Plasmonics has recently been the subject of intense research efforts, owing to the fact that strong optical interactions can be effectively confined in metallic nanostructures. The intense electromagnetic fields by free electron oscillations at the metal surface provide promising applications, of …
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Novel Plasmonic Nanostructures for Applications in Sensing, Imaging, and Controlled Release
… emphasis on engineering the properties of novel plasmonic nanostructures, especially silver: Ag) and gold: Au) nanostructures with well-defined shapes, for biomedical applications in sensing, imaging and drug delivery. The first part of this work focused on the development of novel dimeric …
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Towards stimuli-responsive functional nanocomposites: smart tunable plasmonic nanostructures Au-VO2
The fascinating optical properties of metallic nanostructures, dominated by collective oscillations of free electrons known as plasmons, open new opportunities for the development of devices fabrication based on noble metal nanoparticle composite materials. This thesis demonstrates a low-cost and …
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OPTICAL PROPERTIES OF 2D TRANSITION METAL DICHALCOGENIDES ENHANCED BY PLASMONIC NANOSTRUCTURES
… and second harmonic generation (SHG) by gold plasmonic nanostructure with sub-20 nm-wide trenches. Additionally, we investigated the physics process of light-to-electron conversion in MoS2 on graphene by transient absorption spectroscopy. These interesting phenomena of PL, SHG and …
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Applications of Cathodoluminescence in Plasmonic Nanostructures and Ultrathin InAs Quantum Layers
… Two specific optical nanomaterials, including plasmonic nanostructures and semiconductor quantum layers, are investigated by the cathodoluminescence (CL) measurement. </p> <p>Surface plasmonic resonance can be generated when high-energy electrons strike the interface between the dielectric …
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Design and characterization of colorimetric plasmonic nanostructures for imaging and sensing
… experiments are undertaken using a colorimetric plasmonic nanocup array substrate with a single extraordinary optical transmission peak in the visible light range. Sensitive colorimetric sensing is demonstrated by detecting transmission peak shift upon the molecular adsorption or the dielectric …
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Engineered Plasmonic Nanostructures for Infrared Spectroscopy, Refractive Index Sensing and Nonlinear Optics
… interaction in metal nanoparticles and nanostructures – has been the topic of intense research activities for many years. Early researchers studied the dependence of plasmon resonance frequency on the size, shape and dielectric environment of the nanoscale system, mainly for sensing …
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Synthesis of Complex Plasmonic Nanostructures for Applications in Surface-Enhanced Raman Spectroscopy and Biomedicine
… to engineer the properties of noble-metal nanostructures for applications in surface-enhanced Raman spectroscopy: SERS) and biomedicine. Many of these potential applications are made possible by the strong localized surface plasmon resonance: LSPR) of noble-metal nanostructures, which is …
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Plasmonic Nanostructures: Optical Nanocircuits, Tunable Charge Transfer Plasmons, and Properties of Fano Resonant Nanoclusters
… focus on exploring new properties of complex plasmonic nanoclusters and applying them in applications of optical nanocircuits, frequency modulation, and surface enhanced Raman scattering. First, this thesis demonstrates the realization of 3D optical nanocircuits using plasmonic dimer antenna …
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Parallel FDTD Electromagnetic Simulation of Dispersive Plasmonic Nanostructures and Opal Photonic Crystals in the Optical Frequency Range
… for the optical frequency range, such as plasmonic devices and photonic crystals, which are used in many areas of engineering. Plasmonic noble metal nanoparticles are used in order to improve the photovoltaic solar cell efficiency for their forward scattering and electromagnetic field …
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Study and development of plasmonic biosensors for biomedical applications
… characterization of photonic crystal (PC) and plasmonic nanostructures, both of which employ the resonantly enhanced near-field effect for biosensing applications. The near-field enhancement around PC surfaces is exploited to increase fluorescence emission from the surface-bound fluorescent …
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LASER SHOCK IMPRINTING OF METALLIC NANOSTRUCTURES AND SHOCK PROCESSING OF LOW-DIMENSIONAL MATERIALS
… top-down technique for fabricating and tuning of plasmonic nanostructures, and processing of one-dimensional semiconductor nanowires and two-dimensional crystals. The technique utilizes a shock pressure generated by laser ablation of sacrificial materials. Compared with conventional technologies, …
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Time-domain Modeling of Light Matter Interactions in Active Plasmonic Metamaterials
… (FDTD)) of light matter interactions in active plasmonic metamaterials. In order to model the dispersion of plasmonic nanostructure in the time-domain, we introduce a generalized dispersive material model built on Padé approximants. The developed 3D FDTD solver is then applied to study several …
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