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 13 of 13 for “"dielectric stack"”.
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Low threshold vertical cavity surface emitting lasers integrated onto Si-CMOS ICs using novel hybrid assembly techniques
… bonded and electrically contacted within the dielectric stack of a commercially-fabricated silicon integrated circuit. To accomplish this, fully processed VCSEL device pills are assembled within dielectric recesses using a vacuum pick up tool, and solder bonded in place using a method …
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Microstructured tungsten thermophotovoltaic selective emitters c by Natalija (Zorana) Jovanović.
… combined efficiency of a selective emitter and a dielectric stack mirror for TPV system applications.
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A few-cycle Cr⁴⁺:YAG laser and optical studies of photonic crystals
… mirrors were a 7-pair GaAs/AlxOy quarter-wave dielectric stack, and the absorber consisted of a InGaAs quantum well centered in a half-wave InP layer. Transmission was measured through a photonic bandgap crystal microcavity resonant near 1550 nm. Cavity quality factors as high as 360 were …
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Nanophotonics for dark materials, filters, and optical magnetism
… perfect optical absorber based on a graphene/dielectric stack, an ultraviolet bandpass filter formed with an aluminum/dielectric stack, and structures exhibiting homogenizable magnetic properties at infrared frequencies. The graphene stack can be treated as a effective, homogenized medium that …
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Linear Optical Thin Films Formed by Electrostatic Self-Assembly
… design of optical filters. High performance dielectric stack filters and narrowband and wideband antireflection coatings are designed using TFCalc simulation software and are fabricated by ESA. Both bulk film sensitivity and layer sensitivity to manufacturing errors are provided. The …
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Fabrication and testing of an infrared spectral control component for thermophotovoltaic power conversion applications
… analysis of filter designs based on a Si/SiO₂ dielectric stack is described in this text. The methods and processes used to fabricate physical samples of the spectral control component are discussed. The results of the spectral analysis of the physical samples are documented and a comparison …
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FUNDAMENTAL ISSUE IN SPACE ELECTRONICS RELIABILITY: NEGATIVE BIAS TEMPERATURE INSTABILITY
… electric field, frequency, duty cycle, and gate dielectric composition. We have improved upon the traditional measurement techniques which suffered from an underestimation of the magnitude of Vth shifts because they failed to account for trapped charge relaxation. Specifically, we have developed …
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Electrostatic Self-Assembly of Linear and Nonlinear Optical Thin Films
… graded index structures, several microns thick. Dielectric stack, Rugate, and antireflection optical interference filters were designed, synthesized and demonstrated. c(2) films of both commercially available polymer dyes and novel polymers designed specifically for the ESA process were …
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Homogenization of Structured Metasurfaces and Uniaxial Wire Medium Metamaterials for Microwave Applications
… wave propagation in metamaterials formed by stacked metasurfaces and structured wire media. In the first part, we propose physical systems that mimic the observed behavior of stacked metal-dielectric layers at optical frequencies, but in the microwave region of the spectrum using stacked …
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modeling and application of nonlinear metasurface
… analyze nonlinear interface, film, and metallo-dielectric stack. Various channels of plasmonic and Fabry-perot enhancement are investigated. A homogenized description of nonlinear metasurfaces is presented. The homogenization procedure is based on the nonlinear generalized sheet transition …
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Ordered photonic microstructures
… in sol-gel structures was accomplished using a dielectric stack consisting of 12 spin-on Si02/Ti02 quarterwave sol-gel films. Similarly, solid-state dielectric stacks consisting of 6 Si/Si02 sputtered films were used to demonstrate the same principle. Microcavities were formed using sol-gel …
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Integrated Catalytic Fabrication Approaches for Graphene-Based Electronic Devices
… from the metal growth substrate to the desired dielectric substrate is a major bottleneck for the integrated manufacturing of graphene-based electronic devices. The performance of a typical graphene field effect transistor (GFET) is marred by the presence of graphene grain boundaries, …
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Self-Assembled Multilayered Dielectric Spectral Filters
Thin film optical filters are made by depositing thin films of optical materials on a substrate in such a way as to produce the required optical and mechanical properties. The Electrostatic Self Assembly (ESA) process is accomplished by the alternate adsorption of poly-anionic and poly-cationic …