Thesis (MS)--Montana State University--Bozeman, 2009. / Typescript. Chairperson, Graduate Committee: James P. Becker. Includes bibliographical references (leaves 96-98).

Chen, Mengyu. / Thesis (M.Phil.)--Chinese University of Hong Kong, 2009. / Includes bibliographical references (leaves 110-116). / Abstracts in English and Chinese. / Abstract --- p.I / Acknowledgments --- p.V / Table of Contents --- p.VI / List of Tables and Figures --- p.VIII / List of Abbreviations and Symbol --- p.XII / Chapter Chapter 1: --- Introduction --- p.1 / Chapter 1.1 --- Left-handed material --- p.1 / Chapter 1.1.1 --- Left-handed transmission --- p.1 / Chapter 1.1.2 --- Corrected physical laws and sub-wavelength imaging --- p.4 / Chapter 1.1.3 --- Methods to realized Left-handed Material --- p.5 / Chapter 1.2 --- The meaning of this work --- p.8 / Chapter 1.3 --- Organization of the thesis --- p.8 / Chapter Chapter 2: --- Basic theory and Metamaterial Devices --- p.11 / Chapter 2.1 --- Left-handed Metamaterials --- p.11 / Chapter 2.1.1 --- Metal wire arrays structure --- p.11 / Chapter 2.1.2 --- SRR structure --- p.14 / Chapter 2.1.3 --- SRR plus wire arrays structure --- p.20 / Chapter 2.1.4 --- Development and Fishnet structure --- p.22 / Chapter 2.2 --- Transmission line model --- p.26 / Chapter 2.2.1 --- Transmission line theory --- p.26 / Chapter 2.2.2 --- Transmission line model of SRR plus wire arrays structure --- p.27 / Chapter 2.2.3 --- Transmission line model of Fishnet structure --- p.29 / Chapter 2.3 --- Electric Metamaterial Devices --- p.32 / Chapter 2.3.1 --- The dielectric property of SRR --- p.32 / Chapter 2.3.2 --- Active Metamaterial Devices --- p.34 / Chapter 2.4 --- Other Metamaterial Devices --- p.36 / Chapter 2.4.1 --- Metamaterial Electromagnetic Cloak --- p.36 / Chapter 2.4.2 --- Metamaterial based Perfect absorber --- p.39 / Chapter 2.5 --- Homogenization and effective material parameters --- p.40 / Chapter Chapter 3: --- Metamaterial devices fabrication --- p.43 / Chapter 3.1 --- Introduction --- p.43 / Chapter 3.2 --- Photolithography --- p.44 / Chapter 3.2.1 --- Process description --- p.45 / Chapter 3.2.2 --- Parameter Selection --- p.50 / Chapter 3.3 --- E-beam Evaporation and lift-off --- p.51 / Chapter 3.3.1 --- E-beam evaporation --- p.51 / Chapter 3.3.2 --- Lift-off --- p.53 / Chapter 3.4 --- Flexible metamaterial and double-layer device --- p.54 / Chapter 3.4.1 --- Polyimide brief introduction --- p.54 / Chapter 3.4.2 --- Double-layer structure and fabrication --- p.57 / Chapter Chapter 4: --- Simulation and Experiment Method --- p.61 / Chapter 4.1 --- Numerical simulation methods and software --- p.61 / Chapter 4.1.1 --- Time domain solver --- p.61 / Chapter 4.1.2 --- Frequency domain solver --- p.62 / Chapter 4.2 --- High Frequency Structure Simulator (HFSS) --- p.63 / Chapter 4.2.1 --- Introduction --- p.63 / Chapter 4.2.2 --- Simulation Process --- p.64 / Chapter 4.2.3 --- Parameter Retrieve Method --- p.67 / Chapter 4.3 --- Terahertz Time Domain spectroscopy system --- p.71 / Chapter 4.3.1 --- Introduction --- p.71 / Chapter 4.3.2 --- System Setup --- p.73 / Chapter 4.3.3 --- Photoconductive Antennas --- p.75 / Chapter 4.3.4 --- Data Analysis Method --- p.77 / Chapter Chapter 5: --- Simulation and Experiment Results and Analysis --- p.82 / Chapter 5.1 --- SRR structure based Metamaterial Devices --- p.82 / Chapter 5.1.1 --- SRR based left-handed material --- p.82 / Chapter 5.1.2 --- Electric Metamaterial Devices with different substrate --- p.84 / Chapter 5.2 --- Fishnet structure based metamaterial devices --- p.94 / Chapter 5.2.1 --- Dual-band Polarization-Insensitive Left-handed Metamaterial --- p.94 / Chapter Chapter 6: --- Conclusion --- p.106 / Chapter 6.1 --- Conclusion and potential application --- p.106 / Chapter 6.2 --- Future work --- p.108 / References --- p.110 / Publication list --- p.116

The objectives of this research lie in the area of millimeter and submillimeter wave signal generation and are directed into two paths that are separate, but related. The first involves the development of a W-Band oscillator using Raytheon's Metamorphic High Electron Mobility Transistor (MHEMT) substrate. The second involves the development of silicon formed rectangular waveguide to replace metallic waveguide, ultimately to be used in THz signal source circuits. An exploration of two different topologies for a W-Band oscillator design utilizing Raytheon s MHEMT substrate is presented. This material will demonstrate the reasoning behind the topology selection and the approach of the design. An evaluation of this first ever W-Band MHEMT oscillator will be presented demonstrating its performance capabilities. Finally, an oscillator design will be presented extending the first successful MHEMT W-Band design. The area of Silicon rectangular waveguide with is covered. A design approach of the silicon waveguide will be discussed. The technology used to fabricate and package the silicon waveguide will be explained. The results of the very first 400 GHz silicon waveguide will be shown and the future efforts will be covered. A silicon micromachined waveguide multiplier using an HBV diode circuit is constructed and successfully demonstrated with an output frequency of 261 GHz, showing little difference between using micromachined waveguide and metal waveguide. Lastly, a power combining frequency multiplier is developed utilizing HBV diodes with an output of 260 GHz. The input and output sections are created using branch line couplers. The results showed good power generation as compared to a single diode multiplier.

Thesis (Ph. D.)--Ohio State University, 2006. / Title from first page of PDF file. Includes bibliographical references (p. 141-146).

Pulsed terahertz (THz) systems are an emergent technology, finding diverse applications as they approach maturity. From their birth in the late 1980's to the wealth of alternate sources and imaging modalities now available, the rise has been fuelled by the expectation that this will prove a world changing technology. This Thesis takes an application focused approach and seeks to provide enabling systems and algorithms for the development of functional imaging systems with broad potential application in security inspection, non-destructive testing and biomedical imaging. Three dimensional pulsed THz imaging systems were first introduced in 1996 using a reflection-mode ultrasound-like configuration. This Thesis builds upon this former work by focusing on transmission mode tomography systems using pulsed THz radiation. Several novel 3D imaging modalities are introduced. The hardware architectures, based on optoelectronic generation and detection of THz radiation are described. Approximations to the wave equation are derived, allowing linear reconstruction algorithms to recover 3D structural information fromthe transmitted THz field. Finally the systems are demonstrated and the achievable resolution and image quality are investigated. Three imaging architectures are developed herein: 1. T-ray holography allows the 3D distribution of point scatters to be resolved based on a single projection image utilising a novel reconstruction algorithm based on the windowed Fourier transform and back-propagation of the Fresnel-Kirchhoff diffraction equation. 2. T-ray diffraction tomography utilises the diffracted THz field to allow a Helmholtz equation based, frequency-dependent reconstruction to be performed and the THz spectrum at each pixel to be calculated. 3. T-ray Computed Tomography (CT) uses analogous techniques to X-ray CT, based on the Radon transform, to provide 3D T-ray reconstructions of unprecedented fidelity. These techniques have important applications in material identification, which is investigated in the second part of this Thesis. Pulsed THz spectroscopy has been widely acclaimed for its potential to identify different materials based on their spectral properties. The second part of this Thesis presents algorithms towards this goal. Three case studies are performed focusing on biomaterial classification, anthrax detection and in vitro osteosarcoma cell differentiation. A classification framework is developed to process the THz spectral data and identify specific materials. A linear filter model is introduced to describe the system response of different materials, and the filter taps are utilised for feature extraction. This technique is demonstrated for biomaterial and anthrax classification. For cell differentiation a genetic algorithm is used to select deconvolved frequency components to train a classifier. In each case a high classification accuracy is demonstrated, highlighting the promise and potential of three dimensional T-ray inspection systems. / Thesis (Ph.D.)--School of Electrical and Electronic Engineering, 2004.

"December, 2003" / Includes bibliographical references (p. 311-348) / Accompanying CD-ROM entitled: 'SPM_PhD_Thesis' contains MATLAB_Algorithms (algorithms for T-ray data analysis and display, as described in the Thesis); Appendix D (Example_Raw_Data_Files - examples of raw T-ray data files, used by the MATLAB algorithms in MATLAB_Algorithms); and Thesis_PDF (a copy of the Thesis printed in Adobe's Portable Document Format (PDF)). / System requirements for accompanying CD-ROM: CD-ROM drive ; Adobe Acrobat reader ; Matlab software. / xxxiv, 358 p. : ill. (col.) ; 30 cm. + 1 CD-ROM (col. ill. ; 4 3/4 in.) / Title page, contents and abstract only. The complete thesis in print form is available from the University Library. / Thesis (Ph.D.)--University of Adelaide, School of Electrical and Electronic Engineering, 2004

"December, 2003" / Includes bibliographical references (p. 311-348) / Accompanying CD-ROM entitled: 'SPM_PhD_Thesis' contains MATLAB_Algorithms (algorithms for T-ray data analysis and display, as described in the Thesis); Appendix D (Example_Raw_Data_Files - examples of raw T-ray data files, used by the MATLAB algorithms in MATLAB_Algorithms); and Thesis_PDF (a copy of the Thesis printed in Adobe's Portable Document Format (PDF)). / System requirements for accompanying CD-ROM: CD-ROM drive ; Adobe Acrobat reader ; Matlab software. / xxxiv, 358 p. : ill. (col.) ; 30 cm. + 1 CD-ROM (col. ill. ; 4 3/4 in.) / Title page, contents and abstract only. The complete thesis in print form is available from the University Library. / Thesis (Ph.D.)--University of Adelaide, School of Electrical and Electronic Engineering, 2004

Thesis (Ph.D.)--University of Adelaide, School of Electrical and Electronic Engineering, 2004. / "December, 2003" Includes bibliographical references (p. 311-348).

Thesis (Ph.D.)--University of Adelaide, School of Electrical and Electronic Engineering, 2005. / Includes bibliographical references (p. 349-379) and index.