Search for dissertations about: "Wide band gap"
Showing result 1 - 5 of 71 swedish dissertations containing the words Wide band gap.
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1. Optical characterization of wide band gap materials by spectroscopic ellipsometry
Abstract : Spectroscopic ellipsometry has been employed in the study of wide band gap materials. Ellipsometry is based on the study of changes in the polarization state of light upon reflection on a surface. READ MORE
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2. EM Design for New Ultra Wide Band Technologies: Eleven Feed Baluns, Bowtie Antennas and Gap Waveguides
Abstract : UWB (ultra wideband), depending on the application requirement, is usually referred to more than 500 MHz bandwidth for radio/wireless applications. Here in this thesis it is also used to denote extremely wideband antennas and components of several octaves bandwidth, particularly for high frequency applications. READ MORE
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3. Growth and Characterization of Metastable Wide Band-Gap Al1-xInxN Epilayers
Abstract : InN to 6.2 eV for AlN, which opens possibilities to engineer opto-electronic devices operating from infra-red to deep ultra-violet wavelengths. Al1-xInxN with the alloy composition x~0.2 can also be used as a lattice-matched electron confinement layer for GaN based electronic devices. READ MORE
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4. Extreme Implementations of Wide-Bandgap Semiconductors in Power Electronics
Abstract : Wide-bandgap (WBG) semiconductor materials such as silicon carbide (SiC) and gallium-nitride (GaN) allow higher voltage ratings, lower on-state voltage drops, higher switching frequencies, and higher maximum temperatures. All these advantages make them an attractive choice when high-power density and high-efficiency converters are targeted. READ MORE
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5. Everything is imperfect: Studies on point defects in insulators
Abstract : Point defects can be detrimental or absolutely necessary for the performance of a material. Due to the implications defects have on a material, defects have been widely studied over the last century. READ MORE