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 31 for “"Photonic bandgap"”.
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Multilayer composite photonic bandgap fibers
… successful fabrication of multilayer composite photonic bandgap fibers. The pertinent background in electromagnetic theory of multilayer dielectric mirrors and optical fibers is surveyed. Materials properties constraints are outlined, with emphasis on those constraints related to processing …
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The fabrication of photonic bandgap bridge resonator structures
Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1994.
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Investigation of air-bridge-waveguide photonic bandgap structures
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1996.
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Sol-gel synthesis of one-dimensional photonic bandgap structures
A series of one-dimensional photonic bandgap devices were fabricated using SiO2 and TiO2 films deposited from solution by the sol-gel method. A dielectric mirror, or broadband interference filter, was fabricated by alternating quarter-wave optical thickness layers of the two films on a silicon …
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Development of hollow-core photonic bandgap fibres free of surface modes
… only recently been possible with the advent of photonic band gap fibres. However, the transmission performance of silica/air hollow-core photonic bandgap fibres has until now been affected by the existence of surface modes. These surface modes couple with the air-guided mode in specific spectral …
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Design and fabrication of one-dimensional and two-dimensional photonic bandgap devices
One-dimensional and two-dimensional photonic bandgap devices have been designed and fabricated using III-V compound semiconductors. The one-dimensional photonic bandgap devices consist of monorail and air-bridge waveguide microcavities, while the two-dimensional photonic bandgap devices consist of …
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Photonic bandgap fibers for transmitting high peak-power pulses in the near infrared
Hollow-core photonic bandgap fibers (PBG) offer the opportunity to suppress highly the optical absorption and nonlinearities of their constituent materials, which makes them viable candidates for transmitting high-peak power pulses. This thesis demonstrates the fabrication and characterization of …
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Shining light through walls : a search for dark photons
… a light shining through a wall experiment using photonic bandgap structures to probe otherwise unreachable regions of the WISP parameter space
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Hollow core photonic crystal fibre as a viscosity and Raman sensor
… investigates the application of hollow core photonic crystal fibre for use as an optical fibre nano litre liquid sensor. The use of hollow core photonic crystal fibre for optical fibre sensing is influenced by the vast wealth of knowledge, and years of research that has been conducted for …
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Design and fabrication of a light emitting diode using a two-dimensional photonic crystal
Photonic Crystals are the optical analog of semiconductor crystals. A periodic variation in the dielectric constant may give rise to a photonic bandgap that forbids the propagation of certain frequency light in one, two, and three dimensions. A two dimensional photonic crystal may be used to …
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Source and channel coding for low-bandwidth speech communication between optoelectronic devices
… recent advances in optoelectronic fibers by the Photonic Bandgap Fibers and Devices Group allow optoelectronic fibers to be woven into standard military equipment. This thesis aims to design an optical communication system that would be capable of using these fibers. Since this project was …
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Photonic crystal based widely tunable laser diodes and integrated optoelectronic components
… a first aspect of this work, the development of photonic crystal based widely tunable laser diodes and their monolithic integration with photonic crystal based passive waveguide and coupler structures is explored theoretically and experimentally. In these devices, the photonic crystal is operated …
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Direct and inverse design of microstructured optical fibres
… and delivery of extremely high optical powers. Photonic bandgap fibres, allowing light guidance in a hollow core, are also extensively studied. The main issues preventing accurate simulations of the properties of fabricated fibres are identified and addressed. An ideal, accurate representation …
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Quantum optical improvements in metrology, sensing, and lithography
… Lastly, in Chapter 5 we discuss how to create photonic bandgap coatings that have unique thermal emissivity properties that could have benefits ranging from increased energy efficiency in light bulbs to better thermal management of satellites.
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Development of multifunctional software for evaluating the photonic properties of new dielectric composite geometries
… unidirectional plane waves on a square grid. 1D photonic crystal stacks were arranged in a square array and it was discovered that sizeable bandgaps for 2D and 3D geometries appear along the principle axes for different polarizations of the structure. Furthermore, bandgaps in different directions …
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A few-cycle Cr⁴⁺:YAG laser and optical studies of photonic crystals
… InP layer. Transmission was measured through a photonic bandgap crystal microcavity resonant near 1550 nm. Cavity quality factors as high as 360 were observed for cavities with a modal volume of only 2([lambda]/2n)3. Photonic crystals were used to enhance the total emission of a light emitting …
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Two classes of unconventional photonic crystals
This thesis concerns two classes of photonic crystal that differ from the usual solid-state 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 …
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Ordered photonic microstructures
This thesis examines novel photonic materials systems possessing order in the atomic, microscopic, and macroscopic dimensional regimes. In the atomic order regime, a structure-property investigation is done for Er203 in which the first report of room temperature photoluminescence (PL) is provided. …
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