Actions for Topological exploitation of electromagnetic metasurface and wearable antenna system

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Topological exploitation of electromagnetic metasurface and wearable antenna system

Author
Wu, Yuhao
Published
[University Park, Pennsylvania] : Pennsylvania State University, 2023.
Physical Description
1 electronic document + 6 .pdf files
Additional Creators
Werner, Douglas H., 1960-
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Graduate Program
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Restricted (PSU Only).
Summary
The use of artificial materials to manipulate light-matter interaction by modifying subwavelength lattice has garnered significant research attention across various wave-modulation and investigation fields. Metasurfaces, a newly emerging 2D counterpart composed of in-plane subwavelength metaatoms, offer high feasibility and an ultrathin profile for manipulating wave properties. Meanwhile, there is a growing interest in exploring the topological nature of photonic systems. Bound states in the continuum (BIC), non-radiative singularities that are of diverging quality factor and rich topological property make ideal candidate for optical modulation. This dissertation explores several functional aspects of BIC-based topological metasurface, including all-optical modulation based on reflective metasurfaces and ultrafast optical vortex generation and modulation on transmissive metasurfaces. On the other hand, wireless body area networks (BAN) and wearable electronic systems are rapidly developing. A lightweight, low-profile communication system is desired that is highly flexible, and robust. To achieve this goal, several technical specifications need optimization such as robustness to human-body loading effect and structural deformation, mutual coupling between channels and radiation efficiency in a small form factor. In this dissertation, several advanced on-body communication antennas are presented that enable on-body/off-body data channels and seamless integration into wearable garments, including a monolayer dual-port orthomode full-duplex antenna and a surface plasmon polariton based leaky textile wave antenna. Furthermore, inspired by the topological analysis in the continuously periodic photonic devices, a new topology is proposed and analyzed for the discrete wireless power transfer (WPT) systems. The power efficiency limit is achieved with generalized parity-time symmetry in the proposed scheme under dynamically varying coupling conditions.
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Dissertation Note
Ph.D. Pennsylvania State University 2023.
Note
Includes 6 additional .pdf text files.
Technical Details
The full text of the dissertation is available as an Adobe Acrobat .pdf file ; Adobe Acrobat Reader required to view the file.
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