Search results
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Title
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3D Printing of Metamaterials with Conductive Elements
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Author
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Tuttle, Geoffrey
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Date Created
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2016
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Subjects--Topical
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Materials science
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Description
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To fulfill their engineered purpose, resonant metamaterials require arrays of complex three-dimensional geometries composed of non-conductive dielectrics and highly conductive materials. In order to create these geometries, 3D printers must be abl...
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Title
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Calibrating slope-dependent errors in profilometry
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Author
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Zhou, Yue
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Date Created
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2014
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Subjects--Topical
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Mechanical engineering, Optics
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Description
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Optical profilometers, such as scanning white light interferometers and confocal microscopes, provide high resolution measurements and are widely utilized in many fields for measuring surface topography. The techniques are capable of high-speed su...
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Title
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Complex photonic crystals for broadband "all-angle" self-collimation
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Author
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Chuang, Yi-Chen
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Date Created
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2010
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Subjects--Topical
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Optics
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Description
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Self-collimation is a dispersion property of many photonic crystals (PCs), in which light beam can propagate free of divergence in the PCs. While self-collimation is a desired property for applications related to wave guiding and light collection,...
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Title
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Effects of Edge Roughness on Optical Scattering from Periodic Microstructures
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Author
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Bergner, Brent
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Date Created
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2009
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Subjects--Topical
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Optics, Nanotechnology
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Description
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Planar photonic crystals and other microstructured surfaces have important applications in a number of emerging technologies. However, these structures can be difficult to fabricate in a consistent manner. Rapid, precise measurements of critical p...
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Title
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Electromagnetic Wave Phenomena In Periodic Metastructures
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Author
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Schenk, John
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Date Created
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2010
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Subjects--Topical
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Electrical engineering, Optics, System theory
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Description
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There is an active effort toward the development of negative index metamaterials for application in high-resolution imaging. In particular, engineering an artificial material exhibiting an index of exactly -1, may permit sub-wavelength imaging. Th...
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Title
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Evaluation of Spatial Resolution and The Non-Linearity Analysis for 3-D Metrology
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Author
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Jain, Swati
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Date Created
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2021
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Subjects--Topical
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Optics, Physics
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Description
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Structured light systems (SLS) have become increasingly important for three-dimensional shape measurements. A quantitative evaluation of the spatial resolution is also becoming increasingly important. The spatial frequency response of the instrume...
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Title
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Evaluation of curved surfaces with x-ray reflectometry
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Author
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Cole, Jacob
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Date Created
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2022
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Subjects--Topical
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Mechanical engineering, Physics
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Description
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This dissertation presents a body of work developing novel models and methods for surface evaluation with X-ray reflectometry (XRR). At the time of this work, XRR is a highly used tool for the measurement of flat wafers and laminated semiconductor...
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Title
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LOW UNCERTAINTY SURFACE AREA MEASUREMENT USING DEFLECTOMETRY
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Author
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Pouya Fard, Ali
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Date Created
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2018
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Subjects--Topical
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Optics, Engineering, Metaphysics
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Description
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Deflectometry has been introduced as a viable alternative to interferometric measurement of specular freeform optical surfaces. Deflectometry measurements show high repeatability; however, due to the errors remaining after the calibration and data...
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Title
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Microwave power imaging for ultra-wide band early breast cancer detection
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Author
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Shao, Wenyi
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Date Created
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2012
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Subjects--Topical
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Electrical engineering, Biomedical engineering, Electromagnetism
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Description
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Due to the critical need for complementary or/and alternative modalities to current X-ray mammography for early-stage breast cancer detection, a 3D active microwave imaging system has been developed. This thesis presents a detailed method for rapi...
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Title
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OPTICAL CHARACTERIZATION OF INHOMOGENEITIES IN BLUE-EMITTING INGAN/GAN MQWS
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Author
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Li, Cheng
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Date Created
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2014
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Subjects--Topical
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Electrical engineering
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Description
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The growth of blue-emitting InGaN/GaN MQWs, the system setup of a low temperature PL/EL/IV system for temperature dependent PL/EL/IV spectroscopy, and the system setup of a CLSM with nanometer-scale spectrum measurement and TRPL measurement abilit...
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Title
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Optical Fiber-Based Multi-Directional Fabry-Perot Interferometry Prpbe
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Author
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Shabahang, Farzaneh
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Date Created
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2022
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Subjects--Topical
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Optics
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Description
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The motivation of this thesis is to create an optical probe for the measurement of surfaces in confined spaces. This thesis presents design and operation of an optical fiber-based probe to measure a surface profile or relative displacement of exte...
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Title
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PHASE STRUCTURED WAVEFIELDS WITH PHASE SINGULARITIES AND BISPECTRAL PROPERTIES
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Author
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Scipioni, Marco
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Date Created
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2010
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Subjects--Topical
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Optics
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Description
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The work presented in this dissertation can be subdivided into two parts. The first part illustrates the novel use of a 37 actuator segmented deformable mirror for the creation of optical vortex beams ranging in topological charge from 1 to 10. Th...
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Title
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WAVEGUIDE, PHOTODETECTOR, AND IMAGING APPLICATIONS OF MICROSPHERICAL PHOTONICS
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Author
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Allen, Kenneth
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Date Created
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2014
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Subjects--Topical
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Optics, Engineering, Physics
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Description
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Dielectric microspheres with diameters (D) on the order of several wavelengths of light have attracted increasing attention from the photonics community due to their ability to produce extraordinarily tightly focused beams termed "photonic nanojet...
