Keywords and Phrases
Metamaterial; Micro-Fabrication; Multilayer; Optical Absorber
“Optical metamaterlal (MM) absorbers in the visible or near-infrared range have been widely investigated in these years since they are crucial in many promising applications, such as solar energy harvesting systems, thermo-photovoltaic energy conversion devices, thermal imaging and emissivity control. This dissertation aims to design and investigate various optical metamaterial absorbers based on different mechanisms and theories, such as cavity resonance, impedance match, equivalent circuit model and waveguide stop light mode. First, via utilizing the cavity resonance, a tunable narrowband MM absorber/emitter for thermophotovoltaic (TPV) is designed and analyzed based on gold nanowire cavities to improve the overall efficiency of TPV systems. Second, a broadband absorber made of ultrathin silica-chromium-silica film working in visible and near-infrared (NIR) range is proposed and demonstrated using impedance transformation method. To further broaden the absorption range and enhance the absorption performance, another broadband absorber covering the visible and near-infrared (NIR) is proposed firstly utilizing the combination of the multilayer impedance match in the short wavelength range and the double resonances in the long wavelength range. Finally, an ultra-broadband multilayer waveguide absorber is designed and studied via the stop light trapped at different waveguide width. The stop light mode is analyzed based on the waveguide mode theory considering the guided forward mode and backward mode at the same waveguide width position”--Abstract, page iv.
Kinzel, Edward C.
Mechanical and Aerospace Engineering
Ph. D. in Mechanical Engineering
Intelligent Systems Center
Missouri University of Science and Technology
Journal article titles appearing in thesis/dissertation
- Imetamaterial thermal emitters based on nanowire cavities for high-efficiency thermophotovoltaics
- Broadband perfect absorber based on one ultrathin layer of refractory metal
- Broadband infrared absorbers with stacked double chromium ring resonators
- Ultra-broadband absorption in infrared by tapered hyperbolic waveguide absorber made of 13-pair au-SiO₂ multilayer
x, 78 pages
© 2018 Huixu Deng, All rights reserved.
Dissertation - Open Access
Deng, Huixu, "Design for optical metamaterial design for optical metamaterial absorber" (2018). Doctoral Dissertations. 2994.