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 17 of 17 for “"nano-optics"”.
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Bridging infrared and visible light with nano-optics
… To overcome these limitations, I develop nanophotonic tools are used to convert IR into visible light, leveraging the efficiency and widespread availability of visible light detectors. Plasmonics exploits the collective oscillations of electrons to funnel light to the nanoscale. In my …
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Laser assisted nano-optics processing in optical data storage
… are presented to show their capabilities in nanostructures fabrication. Laser irradiation through microlens array is used to create nanostructures on phase-change films over a large area. Phase-change nanolithography is developed based on the microlens array patterning followed by wet …
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Nano optics With Phonon-Polaritons in Van der Waals Materials
Tesis doctoral con mención internacional
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Electron-beam lithography towards the atomic scale and applications to nano-optics
… limits of EBL is critically important to push nanotechnology toward the atomic scale. In this thesis we show a comprehensive study of the resolution limiting factors of EBL. We demonstrated that low-energy (sub-5 keV) EBL is able to achieve sub-10 nm half-pitch structures. We investigated the …
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Plasmonic nanostructures and metamaterials for nanoscale light-matter interaction
… study the light-matter interaction phenamena at nanoscale in the presence of plasmonic nanostructures and metamaterials. Using the principles of nano-optics, a range of plasmonic nanodevices are developped for molecular sensing, nonlinear optics and surface plasmon lasing. This theoretical and …
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Mirror-Coupled Nanoantennas with Hexagonal-Boron Nitride Spacers
… range of optical resonators. Combining plasmonic nanoantennas with such resonators enables the formation of nanoscale optical resonances. The novel nano-optics observed by combining these heterostructures with optically active media is laying the foundations for devices such as ultra-high …
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Graphene-Based Nanodevices in the Superconducting and Strongly Correlated Regimes
… band population sequence. Then, I describe nano-optics studies, probing plasmonic collective excitations in MATBG. Last, the study of a novel 2D moiré system beyond MATBG, i.e., twisted bilayer-bilayer graphene, is discussed. The contributions of this thesis to the field pertain to …
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Photonic Metasurfaces for Spatiotemporal and Ultrafast Light Control
… of photonic metasurfaces - planar arrays of nano-antennas - has enabled a new paradigm of light control through wave-front engineering. Space-gradient metasurfaces induce spatially varying phase and/or polarization to propagating light. As a consequence, photons propagating through …
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Non-suspended optomechanical cavities
Phonon-photon interactions mediated by optical radiation pressure are powerful tools for quantum information transduction, for example between a quantum system used by a quantum computer or quantum memory and a quantum system used by a quantum communication network. Cavity optomechanics enhances …
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Cavity Plasmonics - Exploring narrow-gap plasmonic coupled systems to boost, localize and exploit nanometric light -matter interaction
… 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 by a nanometre thin spacer material. Plasmonic cavities have the …
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Quantum Plasmonics: A first-principles investigation of metallic nanostructures and their optical properties
… structure and optical properties of metallic nanoparticles are theoretically investigated front first principles. An efficient implementation of time-dependent density functional theory allows a fully quantum mechanical description of systems large enough to display collective electron …
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Photochemical Tuning of Surface Plasmon Resonances in Metal Nanoparticles
Illuminated metal nanoparticles (MNPs) feature collective electron oscillations (so-called localized surface plasmons or LSPs) which facilitate concentrating light-matter interactions to length scales below the diffraction limit. Part I of this book describes two applications of this confinement …
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Optical Nanoantennas Integrated with 3D Microelectrode Arrays: Hybrid Photonic-Electronic Modalities for Nano-Bio Interfacing
… challenge but recent advancements in micro- and nano-fabrication has shown that patterned protruding pillars from surfaces at the micro- and nano-scale can mimic intrinsic biological structural cues to trigger strong cell adhesion, engulfment, and growth, providing a means by which to engineer …
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Functional Molecular Spacers for Plasmonic Nanojunctions: Design, Synthesis and Self-Assembly
… and the enhanced optical fields that occur in nanoscale junctions between gold nanoparticles (AuNPs). This behaviour is enabled by optically resonant collective electron density oscillations (and electrostatic coupling thereof) at the nanoparticle and nanojunction surfaces, which confine …
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Nanoscale Control of Gap-plasmon Enhanced Optical Processes
Surface plasmon resonances of metal nanostructures have been studied intensely in recent years. The strong plasmon-mediated electric field enhancement and field confinement well beyond the diffraction limit has been demonstrated to improve the performance of optical devices including ultrasensitive …
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Light and Single-molecule Coupling in Plasmonic Nanogaps
… plasmon polaritons (SPPs). SPPs are confined in nanometre gaps formed between two metallic surfaces which creates an optical resonance. This optical resonance of the system is controlled by the geometry and the material of the nanogap. The focus of this work is to understand and utilize these …
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Nanostructured Devices for Ultrasensitive and High Throughput Vibrational Spectroscopic Imaging
… This dissertation discusses design of novel nanostructured devices for enhancing the sensitivity, acquisition rate and multiplexing capabilities in vibrational spectroscopic imaging. First, Surface-enhanced Raman scattering (SERS)-based substrates will be discussed and nanostructured particle …