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 29 for “"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 liquid …
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Surface plasmon polariton mediated energy transfer from external antennas into organic photovoltaic cells
… 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 spectrum. In …
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Epitaxial growth and plasmonic coupling in topological insulator heterostructures
… among these surface states, for example Dirac plasmon polariton, are in the far-IR THz spectral range, which is hardly accessed by traditional semiconductors. These unique properties enable TI a promising platform for far-IR sensing, security screening, and other optoelectronic devices that …
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Electrically-tunable near-field heat transfer with ferroelectric materials
… of magnitude via the use of surface phonon polariton or plasmon polariton waves. This enhancement has potential applications in different devices, such as thermal emitters, thermal rectifiers, thermophotovoltaic and thermoelectric energy conversion systems. In this thesis, the author …
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Photosynthesis-inspired device architectures for organic photovoltaics
… 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 transfer …
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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
… the different remote regions by means of surface plasmon polariton (SPP) propagation. As the SPP propagates, it accumulates different amounts of quadratic and cubic dispersion depending on the path taken, explaining the dependence on spectral phase. The quadratic and cubic dispersion for a number …
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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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Nanophotonics for tailoring the flow of thermal electromagnetic radiation
… of graphene and show that thermally excited plasmon-polariton modes can strongly mediate, enhance, and tune the energy exchange in this system. We predict maximum transfer at low doping and for plasmons in two graphene sheets in resonance, with orders-of-magnitude enhancement over the …
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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
… 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 show …
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Eigenschaften von Silber-Nanodrähten
… 440 nm. It was assumed to be due to a localized plasmon-polariton excitation with the electric field normal to the wire axis. It could be reproduced by simulation calculations of Dr. M. Quinten, for normal polarisation of the incident light. Another, broad, peak was observed at 650nm when the …
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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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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
… 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 of …
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Control of Exciton Photon Coupling in Nano-structures
… the interaction of excitons with photons and plasmons and methods to control and enhance this interaction. This study is categorized in three parts: light-matter interaction in microcavity structures, direct dipole-dipole interactions, and plasmon-exciton interaction in metal-semiconductor …
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Silver nanoparticles and thin films for strained-silicon surface enhanced raman spectroscopy and capacitively-coupled radiofrequency heating
… 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 compared to the …
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