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 15 of 15 for “"Optical resonance"”.
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Nonlinear optical properties of natural dyes based on optical resonance
Recent research shows that the study of optical properties of organic material natural dyes has gained much consideration. The specific functional groups in several natural dyes remain essential for the large nonlinear absorption expressed in terms of nonlinear optical susceptibilities or other …
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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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Resonant Detection of Nano to Microscopic Objects Using Whispering Gallery Modes
… several thousand times and thus creates an optical resonance. The unprecedented narrow linewidth of such a microsphere resonance (Q factors of up to 3x10⁹) allows precise measurement of its frequency. Dielectric microspheres of very high Q are thus the ideal choice for a resonant molecular …
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Preliminary investigation on optical cavity-based biosensor using double-sided tape.
… Our team has developed a foundational optical cavity-based biosensor capable of biomarker detection using low-cost fabrication methods, components, and a differential detection method. This biosensor laid the foundation for the creation of a double-sided tape-based biosensor to make …
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Light-induced torque at multipolar plasmon resonance
… of this interaction reaches maximum at optical resonance. By understanding and designing the electromagnetic resonance of nanostructures, we can manipulate the electromagnetic field distribution as desired, with the benefits of enhancing the field strength and squeezing the field spot to …
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Two classes of unconventional photonic crystals
… dielectric photonic crystals studied in optical physics. The first class of unconventional photonic crystal consists of atoms bound in an optical lattice. This is a "resonant photonic crystal", in which an underlying optical resonance modifies the usual band physics. I present a …
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DNA nanotechnology for light-emitting plasmonic applications
… light into nanometric spaces, sustaining an optical resonance. This resonance can be carefully tuned by changing the geometry and material of the gap. In this work, I use the NanoParticle-on-Mirror (NPoM) geometry to fabricate plasmonic cavities in a bottom-up fashion by simply drop casting …
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Tailoring Optical and Plasmon Resonances in Core-Shell and Core-Multishell Nanowires
… sub-wavelength structures which exhibit strong optical (Mie) resonances in the visible range. In addition to such optical resonances, the localized surface plasmon resonances (LSPR) in metal and semiconductor (or dielectric) based core-shell (CS) and core-multishell (CMS) NWs can be tailored to …
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Optomechanical Devices and Sensors Based on Plasmonic Metamaterial Absorbers
Surface plasmon resonance is the resonant oscillations of the free electrons at the interface between two media with different signs in real permittivities, e.g. a metal and a dielectric, stimulated by light. Plasmonics is a promising field of study, because electron oscillations inside a …
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POLYMER–BASED RESONANT WAVEGUIDE GRATING STRUCTURE AND ITS APPLICATIONS
<p>Resonance waveguide grating structures have been a subject of interest for several decades. This optical technique offers unique advantages when compared with other optical components. This stems from their relatively simple structure comprised of layers, as well as their high reflection …
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Spectroscopic characterization of iron-oxygen intermediates in human aromatase (CYP19A1)
… enzyme preparation that is amicable to the optical, resonance Raman (rR) and electron paramagnetic resonance (EPR) spectroscopy and also, cryoradiolysis and cryospectroscopy. The approach I have applied in this project has been that of characterizing the individual fate of reaction …
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Photonic design for chemical analysis
… Furthermore, we discuss chemical detection using optical resonances, which can increase the sensitivity of measurements to material perturbations and also accelerate photochemical reactions. We show that these two effects can be combined multiplicatively, to enhance the detection via …
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Quantum computing with naturally trapped sub-nanometre-spaced ions
… between spectroscopic 4f terms. Some of these optical transitions have coherence times of the order of milliseconds, when the crystals are cooled down to ~ 4 K. There are several reasons for these extraordinary coherence times, which are approximately 8 orders of magnitude greater than those …
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Precision Tuning of Silicon Nanophotonic Devices through Post-Fabrication Processes
… processes. These devices include numerous optical resonator designs as well as slow-light waveguides. Optical resonators are used to confine photons both spatially and temporally. In recent years, there has been much research, both theoretical and experimental, into improving the design of …
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Optical control of nuclear resonant absorption: theory and experiment
… be significantly modified, e.g. new Mossbauer resonances can appear, some of the existing resonances can vanish, both can be Rabi-split, broadened by laser action. In addition, it is predicted that Mossbauer absorption can be completely suppressed due to coherent population trapping. …