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 22 for “"surface plasmon polariton"”.
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Energy transfer between surface plasmon polariton modes with hybrid photorefractive liquid crystal cells
… significant photorefractive control of Surface Plasmon Polaritons (SPP). The photorefractive effects are generated through optically controlling the conductivity of a ~100nm photoconducting poly-N-vinyl-carboxyl (PVK) layer. Therefore, when a potential is applied across the cell, the …
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Surface plasmon polariton mediated energy transfer from external antennas into organic photovoltaic cells
… transferred into the photovoltaic cell via surface plasmon polariton modes in an interfacial thin silver contact. By decoupling the optical and electrical functions of the cell, this new architecture has the potential to circumvent the tradeoff between light absorption and charge separation …
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Passive and Thermo-Optic Characterization of Long-Range Surface Plasmon-Polariton Structures in CYTOP
Long-range surface plasmon-polariton waveguides fabricated of gold, cladded with CYTOP, designed to be 5μm wide and 35nm thick, were modelled and fabricated by other researchers and tested by the author. In passive measurements, cutback curves were drawn and S-bends, Y-junctions, Mach-Zehnder …
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Designing Enhanced Nonlinearity in Plasmonic Devices with Epsilon-Near-Zero Films
… limited compatibility with deeply subwavelength plasmonic confinement. This thesis computationally investigates epsilon-near-zero thin films integrated into plasmonic waveguide architectures as a route toward stronger light–matter interaction in compact nonlinear devices.</p> <p>Two waveguide …
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SCATTERING OF LIGHT BY PLASMONIC AND DIELECTRIC NANOPARTICLES & ITS APPLICATION IN SUBWAVELENGTH IMAGING
… progress in sibwavelength imaging field, surface plasmon polariton (SPP) energy loss, sophistications in nanofabrication, specific laser sources, and parameter configuration of SPP excitation are factors which hamper far-field and near-field subwavelength imaging in the whole visible …
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Photosynthesis-inspired device architectures for organic photovoltaics
… the antenna to the charge generating layers via surface plasmon polariton modes in the interfacial thin silver contact and via radiation into waveguide modes. We experimentally demonstrate devices with both single layer antennas and strongly absorbing resonant cavity antennas. We measure energy …
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Controlling light on the nanoscale: ultrafast plasmonics and phase change functionality
… first experimental confirmation that femtosecond plasmon pulses can be generated, transmitted and modulated along a metal/dielectric waveguide is achieved. The ultrafast optical modulation of plasmons is accomplished by optical excitation of the aluminium plasmonic waveguide using 200 fs optical …
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Characterization and control of the nonlinear optical properties of dendritic silver nanoparticle clusters
… thin films of silver nanoparticles on dielectric surfaces are explored. Specifically, this dissertation will present experiments in which an ultrafast laser (~ 13 fs) centered at 800 nm is focused at normal incidence on a thin film of polydisperse silver nanoparticles on a quartz substrate. Upon …
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Efficient Light Coupling Techniques for Integrated Photonics
… optical fiber mode and the on-chip nano-photonic/plasmonic mode of a photonic circuitry is the major contributing factor to an inefficient fiber-to-chip coupling. Additionally, due to the inherent birefringence of the on-chip waveguides (i.e. silicon-on-insulator waveguides) the coupling …
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Enhanced Rainbow Trapping in Width-graded Chirped MIM Nano-gratings for High-sensitivity Multiwavelength Bio-molecular Detection
… theoretical and experimental investigations of plasmonic width-graded nano-gratings vis-à-vis a nanophotonic sensing platform amenable for integration within a Lab-on-a-Chip Point-of-Care system. Theoretically, we delineate the four principal surface plasmon polariton coupling and its …
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Investigating the Electron Transport and Light Scattering Enhancement in Radial Core-Shell Metal-Metal Oxide Novel 3D Nanoarchitectures for Dye Sensitized Solar Cells
… enabling a longer optical path-length, localized surface plasmon resonance (LSPR) or by near-field coupling between the surface plasmon polariton (SPP) and the dye excited state. Rapid, radial electron collection is of practical significance because it should allow alternate redox shuttles that …
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Plasmonics Using High Quality Epitaxial Graphene: An Approach towards Next-Generation Optical Computing
… devices. </p> <p> However, by adopting a plasmonic approach, which exploits near field electromagnetic effects at a conductor/dielectric interface, significant shrinkage of the electromagnetic field of light can been achieved, by as much as 1000x, potentially enabling practical …
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Photonic engineering of near- and far-field radiative heat transfer
… In contrast, thin-films of metals supporting surface plasmon polariton (SPP) modes will exhibit the opposite effect where the hybridization of SPP modes on both sides of the film will lead to a spectrally broadened resonant mode that can enhance near-field radiative transfer by over an order …
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Silver nanoparticles and thin films for strained-silicon surface enhanced raman spectroscopy and capacitively-coupled radiofrequency heating
… wide range of novel uses and applications. The surface plasmon polariton response of Ag NPs and thin films dispersed onto nm-thin layers of strained silicon (ɛ-Si) grown on Si1-xGex virtual substrates can be utilised to provide surface enhanced Raman spectroscopy (SERS) of the ɛ-Si layer …
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Field-Portable dissolved gas sensing and perspectives in aqueous microplastic detection
… In situ analysis of dissolved gas content in surface waters is currently performed with large, expensive instruments, such as spectrometers, which are coupled with gas equilibration systems, which extract dissolved gas from water and feed it to the sensor. Accurate, low cost, and portable …
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Field-Portable Dissolved Gas Sensing and Perspectives in Aqueous Microplastic Detection
… In situ analysis of dissolved gas content in surface waters is currently performed with large, expensive instruments, such as spectrometers, which are coupled with gas equilibration systems, which extract dissolved gas from water and feed it to the sensor. Accurate, low cost, and portable …
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Novel Devices for Terahertz Wave Imaging, Wave-guiding and Sensing
… of 1.5 mm. We studied the phenomenon of surface plasmon-polariton in THz range on the platform of a parallel-plate waveguide (PPWG). In this thesis, we show the characterization of the waveguide mode of a finite-width parallel plate waveguide by using an improved scattering-probe …
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Nanoplasmonics and silicon nanophotonics devices for sensing applications
… One of the subsets of nanophotonics is nanoplasmonics, which deals with manipulation of light using the unique optical properties of metal nanostructures. Manipulation of light in nanoscale using properties of surface plasmon will make it possible to accomplish a myriad of applications …
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The Role of Triplet Exciton Lifetime in the Stability and Efficiency of Blue Phosphorescent OLEDs Or Why Even The Brightest OLEDs Have a Dark Side
… rescent dye emitter systems. By engineering a plasmonic triplet quenching pathway, we find a cubic dependence of photostability on triplet lifetime for doped emitter sys- tems showing that triplet lifetime is a dominant factor - more so than reducing triplet density alone. We then implement an …
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Experiments in Graphene and Plasmonics
… based optical sensors, and grating based plasmonics are explored experimentally. Graphene nanoribbons exhibit highly insulating states that may allow for graphene based digital applications. We investigate the sensitivity of these states to local charged impurities in ultra high vacuum. We …
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