Search results
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Title
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A Detailed Description of Keldysh's Model of Photoionization
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Author
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Darden, Kenan
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Date Created
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2023
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Subjects--Topical
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Physics, Optics, Quantum theory
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Description
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Leonid Keldysh’s 1965 paper "Ionization in the Field of a Strong Electromagnetic Wave" contains useful and simple-to-implement equations predicting the rate of photoionization in both atomic gasses and general crystalline solids. Crucially, his re...
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Title
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A MODIFIED SELF-INTERFERENCE BASED INCOHERENT DIGITAL HOLOGRAPHIC RECORDING SYSTEM
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Author
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Mishra, Abhinav
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Date Created
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2019
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Subjects--Topical
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Mechanical engineering, Optics
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Description
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A Fresnel-type self-interference based incoherent digital holographic system that can measure the intensity and direction of incoming light field is proposed. This system is composed primarily of a convex lens as an objective, a linear polarizer, ...
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Title
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A Novel Fluorescence Based Method of Assessing Subsurface Damage in Optical Materials
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Author
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Williams, Wesley
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Date Created
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2009
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Subjects--Topical
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Mechanical engineering, Materials science, Optics
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Description
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Lapping and polishing are loose abrasive finishing processes that have been used to achieve critical surface parameters in optical materials for centuries. These processes remove material from the surface through a variety of mechanical and chemic...
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Title
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A novel positional sensor for 3D vascular reconstruction
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Author
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Merritt, John
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Date Created
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2011
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Subjects--Topical
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Optics, Information technology
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Description
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Abstract Intravascular ultrasound (IVUS) is a device that is surgically inserted into a femoral artery, or vein, to aid in the diagnosis of cardiovascular disease. Correctly locating the IVUS tip facilitates accurate 3D vascular reconstruction. Re...
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Title
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ABSOLUTE DISTANCE (THICKNESS) METROLOGY USING WAVELENGTH SCANNING INTERFEROMETRY
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Author
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Suratkar, Amit
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Date Created
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2009
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Subjects--Topical
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Optics, Optical engineering, Metrology
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Description
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Wavelength scanning interferometry offers a new dimension in precision metrology by measuring the cavity length (thickness), the cavity length variation over the cavity area (flatness), and the optical homogeneity within a transparent cavity; with...
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Title
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An all optical approach for comprehensive in-operando analysis of radiative and nonradiative recombination processes in GaAs double heterostructures
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Author
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Zhang, Y. (Yong), 1960-, Zhang, Fan, Castaneda, Jose, Gfroerer, Timothy, Friedman, Daniel, Zhang, Yong-Hang, Wanlass, Mark W.
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Subjects--Topical
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Optics, Photoluminescence
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Description
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We demonstrate an all optical approach that can surprisingly offer the possibility of yielding much more information than one would expect, pertinent to the carrier recombination dynamics via both radiative and nonradiative processes when only one...
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Title
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COMPRESSIVE IMAGING AND DUAL MOIRÉ LASER INTERFEROMETER AS METROLOGY TOOLS
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Author
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Abolbashari, Mehrdad
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Date Created
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2013
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Subjects--Topical
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Optics, Engineering
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Description
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Metrology is the science of measurement and deals with measuring different physical aspects of objects. In this research the focus has been on two basic problems that metrologists encounter. The first problem is the trade-off between the range of ...
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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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Controlled coherence plasmonic light sources
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Author
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Gbur, Greg, Smith, Matt
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Date Created
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2021
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Subjects--Topical
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Physics, Optics
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Description
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Through a computational model, we study the coherence converting capabilities of an array of holes in a surface plasmon-supporting metal plate, with an eye towards the creation of controlled coherence plasmonic light sources. We evaluate how the a...
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Title
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Cycle of phase, coherence and polarization singularities in Young's three-pinhole experiment
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Author
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Gbur, Greg, Pang, Xiaoyan, Visser, Taco D.
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Date Created
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2015
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Subjects--Topical
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Physics, Optics
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Description
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It is now well-established that a variety of singularities can be characterized and observed in optical wavefields. It is also known that these phase singularities, polarization singularities and coherence singularities are physically related, but...
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Title
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DESIGN AND FABRICATION OF LOW LOSS AND LOW INDEX OPTICAL METAMATERIALS
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Author
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Cox, Princess
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Date Created
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2013
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Subjects--Topical
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Optics, Nanoscience
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Description
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The study of optics has changed over the past 3000 years. We have developed beyond the early lens technologies of quartz and other types of glass materials and new materials are being engineered to enhance the properties of naturally occurring mat...
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Title
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DUAL PROJECTION FRINGE PROJECTION PROFILOMETRY
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Author
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Venkatesh, Bhanu teja
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Date Created
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2019
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Subjects--Topical
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Optics, Engineering, Three-dimensional modeling
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Description
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Fringe-pattern projection (FPP) techniques are widely used for surface-shape measurement in a wide range of applications like object and scene modeling, part inspection, and reverse engineering. This thesis presents a way to increase the accuracy ...
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Title
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Design for Metrology of Freeform Optics
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Author
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Venditti, Kristen
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Date Created
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2020
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Subjects--Topical
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Mechanical engineering, Optics, Engineering
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Description
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Freeform optics offer significant advantages over the conventional aspheric optics, but pose new challenges in metrology and manufacturing. The spatial frequencies of an optical surface that must be measured have changed due to the progression of ...
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Title
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Design, Fabrication and Testing of Hierarchical Micro-optical Structures and Systems
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Author
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Cannistra, Aaron
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Date Created
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2011
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Subjects--Topical
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Optics
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Description
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Micro-optical systems are becoming essential components in imaging, sensing, communications, computing, and other applications. Optically based designs are replacing electronic, chemical and mechanical systems for a variety of reasons, including l...
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Title
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Dynamic aerosol and dynamic air-water interface curvature effects on a 2-Gbit/s free-space optical link using orbital-angular-momentum multiplexing
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Author
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Gbur, Greg, Song, Haoqian, Zhang, Runzhou, Hu, Nanzhe
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Date Created
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2022
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Subjects--Topical
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Physics, Optics
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Description
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When an orbital-angular-momentum (OAM) beam propagates through the dynamic air-water interface, the aerosol above the water and the water surface curvature could induce various degradations (e.g., wavefront distortion, beam wandering, scattering, ...
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Title
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EXTERNAL WAVELENGTH STABILIZATION OF GRATING COUPLED SURFACE EMITTING LASERS AND APPLICATIONS
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Author
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Yilmaz, Yigit
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Date Created
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2012
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Subjects--Topical
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Electrical engineering, Optics, Electromagnetism
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Description
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In this dissertation, we explore a semiconductor optical device configuration based on non-resonant diffraction grating coupler. These devices are coupled with monolithic and external wavelength selection elements to form the resonant cavity lasin...
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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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Electric Field Dependent Spectroscopy of Single Nanocrystal Systems
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Author
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LeBlanc, Sharonda
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Date Created
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2012
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Subjects--Topical
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Optics, Nanoscience, Chemistry, Physical and theoretical
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Description
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A suite of single molecule spectroscopic techniques and data analysis methods were implemented to explore the complex role of electric fields in single semiconductor nanocrystal photophysics. This dissertation spans the synthesis, characterization...
