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 14 of 14 for “"nanoparticle on mirror"”.
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PLASMONIC NANOPARTICLES AS VERSATILE NANORULERS FOR SENSING APPLICATIONS: DEVELOPING THE NANOPARTICLE-ON-MIRROR ARCHITECTURE
The basis of plasmonic sensors is the resonant coupling between the oscillations of free electrons, called plasmons, and incident visible light waves. By confining these oscillations within a nanostructure, the coupling efficiency is enhanced by the creation of localized surface plasmon resonant …
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Plasmonic Sensing via Surface-Enhanced Spectroscopies
The research reported in this thesis focuses on the high field localisation formed in the nanometric gaps between gold nanoparticles. Sub-wavelength sized nanoparticles irradiated with light support electron oscillations known as plasmons, and coupling of plasmons between adjacent nanoparticles …
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DNA nanotechnology for light-emitting plasmonic applications
DNA nanotechnology for light-emitting plasmonic applications - Sara Rocchetti. The development of plasmonic nanocavities allows for the direct observation of light-matter interactions at the nanoscale. Collective oscillations of electrons (SPPs) at a metal-dielectric interface confine light into …
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In-situ plasmon-enhanced characterization of optically accessible ultra-thin film ferroelectric devices
… thesis presents novel nanoscale characterisation techniques and probes for optoelectronic analysis of ultra-thin film ferroelectric (FE) devices, which overcome the drawbacks of contemporary investigation methods such as their destructive nature, lack of precision, or in certain techniques the …
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Molecular Optoelectronics in Plasmonic Nanocavities
Creating functional optoelectronic devices using individual or ensembles of molecules is currently an active research area, driven by the ever-increasing demand for miniaturisation of electronic devices and the exploration of light-matter interactions at the molecular level. This thesis …
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Spectroscopy and Electrochemistry of Nanometre-Scale Plasmonic Gaps
… nano-electrode for spectro-electrochemistry: the Nanoparticle-on-Mirror (NPoM). I utilise the extreme confinement of light by coupled plasmons to understand different electrochemical processes at the electrode/molecule interface and learn about ion diffusion and catalysis in a confined …
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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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Dynamic Plasmonic Systems with Actuating Nanotransducers
… or work together to apply coherent forces on-demand has been long sought after in the field of nanotechnology. A major hurdle in this endeavour is the lack of a reliable source of power for driving these machines. In this work, plasmonic nanoparticles coated with thin thermoresponsive …
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Interaction of Light and Conjugated Polymers in Plasmonic Nanogaps
Conjugated polymers, characterized by a backbone of alternating double and single bonds, exhibit unique optical and electronic properties due to their delocalized electrons. These properties make them suitable for various applications, including organic transistors, electrochromic displays, and …
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Cavity Plasmonics - Exploring narrow-gap plasmonic coupled systems to boost, localize and exploit nanometric light -matter interaction
The core of this thesis explores the optical response and tuneability of plasmonic cavities. At its heart stands the nanoparticle on mirror construct (NPoM) - a robust plasmonic cavity formed via self-assembly. It consists of a nanoparticle placed on top of an under- lying metal substrate separated …
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Nanoscale device engineering and plasmon-enhanced light – matter interactions for the characterization of 2D materials
… thesis introduces nanoscale tools for optoelectronic characterization of 2D materials, addressing limitations of existing techniques including destructiveness, imprecision, and vacuum requirements. Three novel characterization methods are proposed. They all employ gold nanoparticles as electrical …
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Controlling and Understanding Atomic-Scale Dynamics within Plasmonic Nanogaps
Plasmonic nanogaps, such as the ∼1 nm gaps between two gold surfaces in a nanoparticle-on-mirror (NPoM) structure, are able to confine light to nanoscale volumes and enhance optical fields by orders of magnitude. This enhancement allows a few hundred molecules placed in this gap, such as …
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Light and Single-molecule Coupling in Plasmonic Nanogaps
Plasmonic cavities confine optical fields at metal-dielectric interfaces via collective charge oscillations of free electrons within metals termed surface plasmon polaritons (SPPs). SPPs are confined in nanometre gaps formed between two metallic surfaces which creates an optical resonance. This …
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Light Coupling to Plasmonic Nanocavities
The work reported in 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 …