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 426 for “"Plasmonic"”.
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Designing plasmonic structures
… thesis. An effective work-flow in designing "plasmonic" structures is detailed. Various applications are then discussed: (1) Enhanced transmission through subwavelength apertures in metal films; (2) long range SP hybrid waveguides for use in the area of micro-electronics; (3) circular …
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Biasing Plasmonic Nanocavities
… nanoparticles deposited on the sample, whose plasmonic coupling with the bottom electrode is modulated by the actuation mechanism. The second method used to construct nanoscale junctions is more appropriate for molecular junctions, and is based on electrical contacting of individual metallic …
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Scalable Plasmonic Nanopixels
Plasmonic colourations are promising for flat panel display applications due to their full-colour gamuts and high spatial resolution. However, it cannot be readily tuned and requires expensive lithographic techniques. In this work, the concept of plasmonic nanopixels is proposed. These are …
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Integrated plasmonic nano-antenna devices
… of opto-electronic devices. An example of a plasmonic device is a nano-antenna. Although nano-antennas are applied in biological sensing, imaging and nano-particle manipulations, they are passive devices that must be driven by an external source. As combining plasmonic nano-antennas with …
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Numerical Modelling of Plasmonic Waveguides
Plasmonics play an essential role now in the area of compact on chip optical systems; this is due to their unique characteristics and the ability of guiding light below the diffraction limit. Moreover, the integration between optical systems and electronic systems can be realised using those …
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Tailoring plasmonic substrates for SERS
… studied, which results in a slight shift in the plasmonic absorption. This was compared with the reduction of a diazonium salt on the surface, which results in a significant increase in plasmonic absorption, attributed to a physical sharpening of the metal structure, and in turn better defined …
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Plasmonic hot carrier-driven electrochemistry
… in photocatalysts, including systems based on plasmonic metal nanoparticles. To take advantage of these materials, a fundamental understanding of how plasmon-induced hot-carriers drive chemical reactions is needed. This work examines how different hot carrier distributions affect …
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Molecular Optoelectronics in Plasmonic Nanocavities
… investigates the integration of molecules with plasmonic nanostructures to develop novel optoelectronic devices and gain deeper insights into nanoscale phenomena. The research focuses on two primary nanostructures: the nanoparticle-on-mirror (NPoM) geometry and monolayer aggregate (MLagg) films. …
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Light Coupling to Plasmonic Nanocavities
… this thesis concerns how light can be coupled to plasmonic nanocavities, increasing its electric field by orders of magnitude. Variations of a popular NanoParticle (NP) on Mirror (NPoM, or patch antenna) structure were used, which localizes visible light in 3 dimensions to an area of contact …
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Simulation methods for plasmonic structures
… surface, also known as surface plasmons. These plasmonic resonances enable an unprecedented control of light by confining the electromagnetic field to regions well beyond the diffraction limit, thereby leading to nearfield enhancements of the incident wave of several orders of magnitude. These …
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Shape-Engineering Substrate-Based Plasmonic Nanomaterials
… procedures aimed at generating substrate-based plasmonic nanomaterials, the last chapter will serve to highlight a series of on-going studies aimed at defining these nanomaterials as highly effective heterogeneous catalysts. Several examples are shown including (i) nanoparticle films synthesize …
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Active and Fast Tunable Plasmonic Metamaterials
Active and Fast Tunable Plasmonic Metamaterials is a research development that has contributed to studying the interaction between light and matter, specifically focusing on the interaction between the electromagnetic field and free electrons in metals. This interaction can be stimulated by the …
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Photothermal energy conversion by plasmonic nanoparticles
… when designing optically active devices based on plasmonic nanoparticles. Many early applications of these nanoparticles, like photothermal tumor ablation, drug delivery, and microfluidic devices, depend on the conversion of light to heat. In this dissertation, we compare three nanoparticle …
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Analytical applications of nanostructured plasmonic crystals
… plasmons at the metal-dielectric interface. Plasmonic crystals are a versatile platform for the tunable coupling of light into surface plasmon modes, and soft nanoimprint lithography represents a class of fabrication techniques capable of inexpensive, high fidelity replication of nanoscale …
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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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Plasmonic Sensing via Surface-Enhanced Spectroscopies
… thesis explores the use of nano-aggregates for plasmonic sensing via SERS. A key parameter to control is the gap distance between adjacent nanoparticles. Here the barrel-shaped cucubit[n]uril macromolecules are utilised. I show how nano-aggregates formed with CB[n] spacer molecules can be used …
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Ultrafast Raman Scattering in Plasmonic Nanocavities
… I study vibrations of 1-1000 molecules in a plasmonic nanocavity when driven by picosecond pulsed lasers out of the linear regime. This unravels new non-linear effects such as room-temperature vibrational pumping, giant optomechanical spring shifts, collective molecular vibrations, …
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Towards Urine Sensing in Plasmonic Nanogaps
… molecules in liquids. By confining molecules to plasmonic hotspots between metal surfaces, low concentrations of analytes can be detected. This opens opportunities for multiplexed sensing, but also poses a challenge for the selective measurement of complex analytes, such as urine, which contain …
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Enhancing solar cells with plasmonic nanovoids
This thesis explores the use of plasmonic nanovoids for enhancing the efficiency of thin-film solar cells. Devices are fabricated inside plasmonically resonant nanostructures, demonstrating a new class of plasmonic photovoltaics. Novel cell geometries are developed for both organic and amorphous …
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