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Micro-Optic-Spectral-Spatial-Elements (Mosse), Alok Ajay Mehta
Micro-Optic-Spectral-Spatial-Elements (Mosse), Alok Ajay Mehta
Electronic Theses and Dissertations
Over a wide range of applications, optical systems have utilized conventional optics in order to provide the ability to engineer the properties of incident infra-red fields in terms of the transmitted field spectral, spatial, amplitude, phase, and polarization characteristics. These micro/nano-optical elements that provide specific optical functionality can be categorized into subcategories of refractive, diffractive, multi-layer thin film dichroics, 3-D photonic crystals, and polarization gratings. The feasibility of fabrication, functionality, and level of integration which these elements can be used in an optical system differentiate which elements are more compatible with certain systems than others. With enabling technologies emerging allowing …
Design And Demonstration Of Meanderline Retarders At Infrared Frequencies, Jeffrey Scott Tharp
Design And Demonstration Of Meanderline Retarders At Infrared Frequencies, Jeffrey Scott Tharp
Electronic Theses and Dissertations
Meanderline structures are widely used as engineered birefringent materials for waveplates and retarders at radiofrequencies, and have been previously demonstrated at frequencies up to 90 GHz in the millimeter-wave band. In this dissertation, we present results related to the modeling, fabrication, and experimental characterization of meanderlines across the range from 30 to 100 THz, in the long-wave and mid-wave infrared bands. Specific issues addressed in these new designs include spectral dispersion and angular dependence of the retardance, as well as axial ratio and throughput. The impact resulting from the infrared properties of the metals and dielectrics is explicitly included throughout. …
Resource-Constraint And Scalable Data Distribution Management For High Level Architecture, Pankaj Gupta
Resource-Constraint And Scalable Data Distribution Management For High Level Architecture, Pankaj Gupta
Electronic Theses and Dissertations
In this dissertation, we present an efficient algorithm, called P-Pruning algorithm, for data distribution management problem in High Level Architecture. High Level Architecture (HLA) presents a framework for modeling and simulation within the Department of Defense (DoD) and forms the basis of IEEE 1516 standard. The goal of this architecture is to interoperate multiple simulations and facilitate the reuse of simulation components. Data Distribution Management (DDM) is one of the six components in HLA that is responsible for limiting and controlling the data exchanged in a simulation and reducing the processing requirements of federates. DDM is also an important problem …