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Showing 1 to 20 of 285 for “"Photonic Crystal"”.
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Optimization of Photonic Crystal Structures
… method for improving the performance of photonic crystal structures. Possible future research directions and applications are also briefly discussed.
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Advanced photonic crystal enhanced microscopy
This study seeks to expand the field of photonic crystal enhanced microscopy by extending simple proof-of-concept experiments to advanced biological applications. There are four distinct projects that are related to a central theme: sophisticated microscope instrumentation for photonic crystal …
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Three-dimensional photonic crystal optoelectronics
Photonic crystals are a class of synthetic materials which can control the absorption, emission and propagation of light to an unprecedented degree. In order to fully utilize their properties defect must be added to photonic crystals to direct the flow of light, and light emitting structures must …
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Resonance Fluorescence in a Photonic Crystal
… in the thesis is a two level atom in a photonic crystal and a pumping laser. The photonic crystal provides an environment for the atom, that modifies the decay of the exited state, especially if the atom frequency is close to the band gap. The population inversion is investigated als …
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Bioimaging with photonic crystal enhanced microscopy
… of a newly developed imaging modality, named photonic crystal enhanced microscopy (PCEM) for label-free detection of the surface attached biological samples. Photonic crystal, supporting guided-mode resonances and providing local optical modes, can enhance the light-matter interaction on its …
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Photonic crystal biosensors for tissue engineering
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2021-12-01
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Photoacoustic photonic crystal fiber gas sensor
… acoustic resonator. In recent times, hollow-core photonic crystal fiber (HC-PCF) has emerged as superior gas cell for standard absorption-based laser spectroscopy due to its small size, compatibility with fiber-based optical components, and easily attainable long light-gas interaction path …
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Single Crystal Sapphire Photonic Crystal Fibers
A single crystal sapphire optical fiber has been developed with an optical cladding that is used to reduce the number of modes that propagate in the fiber. This fiber is the first single crystal sapphire photonic crystal fiber ever produced. Fabrication of the optical cladding reduces the number of …
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Algorithms and technologies for photonic crystal modelling
… into the behaviour of light when passing through photonic crystals was carried out using numerical methods. Photonic crystals are expensive and difficult to fabricate so there is a requirement for computer simulations that can quickly and accurately model how the crystal structure will affect the …
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Finite element modelling of photonic crystal fibres
Photonic crystal fibre (PCF), a new kind of optical fibre, has many air-holes in their cross-section and has potential applications to new optical communication systems. The main objective of this research is the modelling of photonic crystal fibre to identify the fundamental and higher order …
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Finite element characterisation of photonic crystal fibres
… order to calculate bending and leakage losses of Photonic Crystal Fibres (PCF). A modal solution approach including the implementations of the conformal transformation and the Perfectly Matched Layer (PML) were undertaken to determine the bending and leakage losses of several designs of Photonic …
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Laterally Current-Injected Membrane Photonic Crystal Emitters
… electroluminescent emission modified by the photonic crystal is demonstrated. Details of the design, fabrication, and characterization required to create the laterally injected photonic crystal emitter are presented. It is found that photonic crystals offer a wide design space for optimizing …
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Photonic crystal emitters in heterogeneously bonded membranes
Photonic crystal (PhC) membrane lasers are good candidates for future photonic integrated circuit applications, including chip-to-chip and on-chip optical interconnects. This is due to their small size, lithographically tunable emission wavelength, and potential for low power operation. In order to …
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Using photonic crystal biosensors for pharmaceutical screening
The application of photonic crystal surfaces for label-free bioimaging and sensing is presented. A label-free biosensor assay is used to monitor the density of cell attachment to the sensor surface, and to quantify changes in attached cell density induced by the introduction of plant extracts. This …
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Porous photonic crystal external cavity laser biosensor
Embargo set by: Colleen Fallaw for item 102812 Lift date: 2019-08-10T21:27:21Z Reason: Author requested U of Illinois access only (OA after 2yrs) in Vireo ETD system
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Photonic crystal enhanced LED for electroluminescence cooling
… In this thesis, we design and fabricate a photonic crystal (PhC) enhanced unencapsulated LED for direct observation of ELC. The PhC pattern and the structure of the device are optimized to achieve approximately 76% extraction efficiency and 300 [mu]W/cm2 net cooling power. The LED is …
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Modeling and Analysis of Photonic Crystal Waveguides
In this work, we investigate several aspects of photonic crystal waveguides through modeling and simulation. We introduce a one-dimensional model for two-dimensional photonic crystal fibers (PCFs), analyze tapered PCFs, analyze planar photonic crystal waveguides and one-dimensional PCFs with …
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Highly polarised ytterbium doped photonic crystal fibre lasers
Strathclyde theses - ask staff. Thesis no. : T12495
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Numerical modelling of photonic crystal based switching devices
In the last few years research has identified Photonic Crystals (PhCs) as promising material that exhibits strong capability of controlling light propagation in a manner not previously possible with conventional optical devices. PhCs, otherwise known as Photonic Bandgap (PBG) material, have one or …
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Gallium Arsenide based photonic crystal surface emitting lasers
Photonic crystal surface emitting lasers (PCSELs) are an emerging class of semiconductor laser which incorporate a 2D photonic crystal into a semiconductor laser structure to provide large area 2D feedback and surface emission. These devices have a number of desirable properties, chief of which is …
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