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 26 for “"Nanocavities"”.
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Biasing Plasmonic Nanocavities
Molecular electronics promises a new generation of ultralow-energy information technologies, based around functional molecular junctions where two electrodes are bridged by just a few molecules. How molecules exactly behave in a real junction however is still not well understood, since interactions …
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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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Light Coupling to Plasmonic Nanocavities
… 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 between the NP …
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Ultrafast Raman Scattering in Plasmonic Nanocavities
… of correlated photon pairs. In plasmonic nanocavities, optical fields are enhanced 100-fold and focused to a nanometre-thin gap. Vibrations of molecules placed in the cavity interact strongly with the optical resonances, forming a coupled optomechanical system. Using pulsed laser …
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Subradiant, superradiant and Fano resonances in dimer and ring/disk nanocavities
… and superradiant plasmon modes in ring/disk nanocavities and dialers are investigated theoretically and experimentally. The subradiance is obtained through an overall reduction of the total dipole moment of the hybridized mode due to antisymmetric coupling of the dipole moments of the parent …
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Amphiphilic block copolymer micelles : creation of functional nanocavities and their use as nanocontainers for controlled release
Block copolymers in solution can self-assemble in to a variety of morphologies, with features on the nanometer length scale. This has lead to significant recent research into this assembly process and a wide range of potential applications. The exchange of block copolymer molecules between micelles …
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Time-Resolved Interactions of Infrared Vibrations and Plasmonic Nanogaps
… detection—employing precisely tailored plasmonic nanocavities to confine and enhance both wavelengths within the same nanoscale volume. Using a custom-built ultrafast microscope setup, sum-frequency generation from individual plasmonic nanocavities uniquely probes the coherent dynamics of …
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Plasmon-powered Nanochemistry
… Single atomic features within these plasmonic nanocavities are shown to further enhance the field-confinement. Such extremely confined light is then utilised to monitor single-molecule surface coordination dynamics in real-time. From bulk solution down to single-molecule, a range of systems are …
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Orientation and Dynamics of Nanoscale Liquid Crystalline Films
… is designed to confine the liquid crystals into nanocavities and allow spectroscopic measurement of the confined films by transmission Fourier-transform infrared spectroscopy (FTIR). The homogeneity of the surface-induced orientation is largely dependent on the thickness of the films. A 40 nm …
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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 nanometric spaces, sustaining an optical resonance. This …
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Real-time observation of particle interactions in matter using laser-driven accelerators
… of H2O molecules through the formation of nanocavities, post irradiation. A two colour chirped optical probe pulse is generated using non-linear crystal media to simultaneously to track the formation of hydroxyl radicals simultaneously with the formation of solvated electrons. These …
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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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Scalable Plasmonic Nanopixels
… with ultra-thin metal films. The plasmonic nanocavities not only create optical response controllable by the gap material properties which benefits for making new functional optical devices, but also allow for substantial field enhancement in the gap, offering an excellent platform for …
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Interaction of Light and Conjugated Polymers in Plasmonic Nanogaps
… Integrating conjugated polymers into plasmonic nanocavities has unlocked electrochromic plasmonic coloration with nano-scale resolution display potential and has served as a platform for nanoscale mechanism characterization. This thesis focuses on the electrochromic nanoparticle on mirror …
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Light-matter interactions of two-dimensional materials and the coupled nanostructures
… interaction between 2D materials and plasmonic nanocavities were found to exhibit an interesting enhancement phenomenon for the optical response of 2D materials. Overall, the studies presented in this thesis work show broad opportunities for using spectroscopic tools to study light-matter …
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Manipulation of Light-Matter Interaction in Two-Dimensional Systems via Localized Surface Plasmons
… bulk, planar silicon coupled with metal bowtie nanocavities, which is an indirect bandgap semiconductor with very low emission efficiency. This was due to the E-field concentrated inside the tips of the metal bowtie achieved by LSPR, leading to increased radiative decay rate. The approach of …
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Plasmonics for On-Chip Photodetectors and Light Sources
… integrated with ultrasmall mode volume plasmonic nanocavities. The cavity integrated silicon vacancies exhibit record instrument-limited 8 ps fluorescence lifetimes, corresponding to >135-fold lifetime enhancement factors, as well as 19-fold photoluminescence (PL) intensity enhancement. These …
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Heterogeneous integration of two-dimensional materials for on-chip optical interconnects
… graphene onto silicon photonic crystal nanocavities, it is possible to reach near unity absorption into graphene. The cavity-graphene system enables a high-contrast (> 10 dB) electrooptic modulation by electrically tuning the Fermi level of graphene. High-speed modulation is possible …
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Nanoscale light-matter interaction of ultrathin materials
… of Landau‐quantized 2D electron gases in nanocavities. The delocalized Landau‐level orbitals introduce inherently nonlocal responses, which we propose to probe through elastic scattering using XUV light with wavelengths similar to the magnetic length, i.e.~the minimal cyclotron radius and, …
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