Open Access. Powered by Scholars. Published by Universities.®
- Institution
-
- University of Central Florida (19)
- Air Force Institute of Technology (16)
- Technological University Dublin (13)
- University of Arkansas, Fayetteville (11)
- City University of New York (CUNY) (8)
-
- Munster Technological University (7)
- University of New Mexico (7)
- California Polytechnic State University, San Luis Obispo (4)
- Michigan Technological University (4)
- Rose-Hulman Institute of Technology (4)
- Washington University in St. Louis (4)
- University of South Florida (3)
- University of Texas at El Paso (3)
- Louisiana State University (2)
- Old Dominion University (2)
- Purdue University (2)
- University of Massachusetts Amherst (2)
- Ateneo de Manila University (1)
- Bard College (1)
- Brigham Young University (1)
- Chapman University (1)
- Claremont Colleges (1)
- Georgia Academy of Science (1)
- Georgia Southern University (1)
- Merrimack College (1)
- Missouri State University (1)
- Missouri University of Science and Technology (1)
- New Jersey Institute of Technology (1)
- Selected Works (1)
- The University of San Francisco (1)
- Keyword
-
- Optics (14)
- Metamaterials (5)
- Openaire (5)
- Coherence (4)
- Imaging (4)
-
- Photonics (4)
- Physics (4)
- 1.3 PHYSICAL SCIENCES (3)
- Holography (3)
- Laser (3)
- Lasers (3)
- Light (3)
- Nanophotonics (3)
- Nonlinear optics (3)
- Photoluminescence (3)
- Raman spectroscopy (3)
- Scattering (3)
- Spectroscopy (3)
- Statistical optics (3)
- 1. NATURAL SCIENCES (2)
- 2D material (2)
- Algorithms (2)
- Atmospheric turbulence (2)
- Atomic, Molecular and Chemical Physics (2)
- Black phosphorus (2)
- Chalcogenide glass (2)
- Color (2)
- Diffraction (2)
- Fibre laser (2)
- Glass ceramics (2)
- Publication
-
- Electronic Theses and Dissertations (19)
- Faculty Publications (11)
- Articles (8)
- Graduate Theses and Dissertations (8)
- Theses and Dissertations (6)
-
- Cappa Publications (5)
- Conference Papers (5)
- Dissertations, Theses, and Capstone Projects (5)
- Dissertations, Master's Theses and Master's Reports (4)
- Graduate Theses - Physics and Optical Engineering (4)
- Optical Science and Engineering ETDs (4)
- Doctoral Dissertations (3)
- Open Access Theses & Dissertations (3)
- USF Tampa Graduate Theses and Dissertations (3)
- Electrical & Systems Engineering Publications and Presentations (2)
- LSU Doctoral Dissertations (2)
- McKelvey School of Engineering Theses & Dissertations (2)
- Physics (2)
- Physics & Astronomy ETDs (2)
- Physics Faculty Publications (2)
- Publications and Research (2)
- Theses (2)
- Across the Bridge: The Merrimack Undergraduate Research Journal (1)
- Chemical and Biological Engineering ETDs (1)
- Civil Engineering Undergraduate Honors Theses (1)
- Department of Physics and Astronomy: Dissertations, Theses, and Student Research (1)
- Dissertations (1)
- Dissertations and Theses (1)
- Electrical & Computer Engineering Theses & Dissertations (1)
- Electrical Engineering Undergraduate Honors Theses (1)
- Publication Type
Articles 121 - 130 of 130
Full-Text Articles in Physics
Energy Transfer Between Eu2+ And Mn2+ For Na(Sr,Ba)Po4 And Ba2mg(Bo3)2, Kevin Bertschinger
Energy Transfer Between Eu2+ And Mn2+ For Na(Sr,Ba)Po4 And Ba2mg(Bo3)2, Kevin Bertschinger
Dissertations, Master's Theses and Master's Reports
There is no debate of the affect that solid-state lighting has had on the world we live in. Throughout the centuries, lighting has continued to improve from kerosene lanterns to white light emitting diodes. Even though lighting today is sufficient there is still much room to improve color rendering index and efficiency. An active area of research to improve today's lighting technology is by doping inorganic phosphors with luminescent ion centers. There have been numerous reports of inorganic phosphors showing a variety of emission color and luminescence. In this thesis we discuss two new inorganic phosphors codoped with Eu2+ …
Development Of Uv Led Based Lamps With Modular Optical Heads, Ciara O'Hara
Development Of Uv Led Based Lamps With Modular Optical Heads, Ciara O'Hara
Theses
This project was centred around the development of the optical components, and the optimisation of the optical performance, of ProPhotonix Ltd’s Cobra Cure FX series of products. These are high irradiance, high dose, UVA (primarily 395 nm and 365 nm) Light Emitting Diode (LED) lamps designed for curing applications. An initial prototype developed by ProPhotonix, the smallest in the series, the FX1, underwent significant redesign throughout the project, and the two larger lamps, the FX2 and the FX3 were developed during the course of the project. This work primarily consisted in characterising, accurately modelling, and thereby refining, the optical reflector …
Dynamics Of Swept Source Lasers, Ben O'Shaughnessy
Dynamics Of Swept Source Lasers, Ben O'Shaughnessy
Theses
The aim of this thesis is to investigate the dynamics of two kinds of swept source lasers for optical coherence tomography. A mathematical model consisting of a pair of coupled delay differential equations was adapted to study Fourier Domain Mode-Locked (FDML) lasers and short cavity swept source lasers, and to explain experimental observations of these lasers.
The short cavity laser is experimentally observed to produce pulses during the frequency sweep. This ‘sliding frequency mode-locking’ behaviour is reproduced by simulation, which is then used to establish simple relationships between the key parameters of sweep speed, linewidth and output power.
The FDML …
Physics And Applications Of Exceptional Points, Qi Zhong
Physics And Applications Of Exceptional Points, Qi Zhong
Dissertations, Master's Theses and Master's Reports
Exceptional points (EPs) are singularities that arise in non-Hermitian physics. Crossing EPs is believed to be related with phase transitions between parity-time-(PT-)symmetric phase and broken PT phase. Owing to their peculiar topology, EPs can remotely induce observable effects when encircled by closed trajectories in the parameter space. In this dissertation, first of all, we investigate the extreme dynamics of non-Hermitian systems near higher order EPs constructed using the bosonic algebra method. The strong power oscillations for certain initial conditions can occur as a result of the peculiar eigenspace geometry and its dimensionality collapse near these singularities. And in the PT …
Pursuing Natural Unity, Consciousness Included, Rowen Cox-Rubien
Pursuing Natural Unity, Consciousness Included, Rowen Cox-Rubien
Scripps Senior Theses
An ontological exploration of consciousness and how it is related to the body and other aspects of physical reality. Framed by David Chalmers' conception of "The Hard Problem", we begin from a physicalist perspective to discuss the problem of mental causation, which is the inquiry of how the mind communicates and interacts with the body. From here we examine the employment of identity reduction to functionalize and therefore physically explain mentality. We find that reductionist methods, the backbone of scientific investigation, do not work to explain conscious experience, because conscious experience is not quantifiable--it is qualitative. Thus we are left …
Using Two-Photon Microscopy To Analyze Arabidopsis Thaliana Leaves Under Autophagy Conditions And Second Harmonic Generation In Collagen, Andres Martin Reyes
Using Two-Photon Microscopy To Analyze Arabidopsis Thaliana Leaves Under Autophagy Conditions And Second Harmonic Generation In Collagen, Andres Martin Reyes
Open Access Theses & Dissertations
Two-photon microscopy has emerged as a highly efficient and effective imaging tool for biological samples. This can be utilized in studying recently emerging technologies and conditions such as the autophagy process in arabidopsis thaliana leaves and second harmonic generation in collagen. Both of these areas of study utilize the two-photon microscopy practice effectively in uncovering more information of the biological nature of examined samples.
Magnetic Field Sensor Based On A Tri-Microfiber Coupler Ring In Magnetic Fluid And A Fiber Bragg Grating, Fangfang Wei, Dejun Liu, Arun Kumar Mallik, Gerald Farrell, Qiang Wu, Gang-Ding Peng, Yuliya Semenova
Magnetic Field Sensor Based On A Tri-Microfiber Coupler Ring In Magnetic Fluid And A Fiber Bragg Grating, Fangfang Wei, Dejun Liu, Arun Kumar Mallik, Gerald Farrell, Qiang Wu, Gang-Ding Peng, Yuliya Semenova
Articles
In this paper we propose and investigate a novel magnetic field sensor based on a Tri-microfiber coupler combined with magnetic fluid and a fiber Bragg grating (FBG) in a ring. A sensitivity of 1306 pm/mT was experimentally demonstrated in the range of magnetic fields from 0 to 15 mT. The reflection peak in the output spectrum associated with the FBG serves as a reference point allowing to avoid ambiguity in determining the spectral shift induced by the magnetic field. Due to its high sensitivity at low magnetic fields, the proposed structure could be of high interest in low field biosensing …
Light Propagation Through A Turbulent Cloud: Comparison Of Measured And Computed Extinction, Eduardo Rodriguez-Feo Bermudez
Light Propagation Through A Turbulent Cloud: Comparison Of Measured And Computed Extinction, Eduardo Rodriguez-Feo Bermudez
Dissertations, Master's Theses and Master's Reports
Remote sensing techniques used for measurement of atmospheric cloud properties operate under the notion that light extinction caused by scattering and absorption is exponential due to Beer-Lambert law. This is expected to be valid for a uni-form medium with no spatial correlations between particle position. The aim of this research was to show that under turbulent conditions, cloud droplets cannot be interpreted as non-correlated, and in turn will exhibit a lower than exponential light decay from scattering. The research took place at the MTU π-Chamber laboratory. A temperature difference between the floor and ceiling of the chamber was applied to …
Wavelength-Selective Metamaterial Absorber And Emitter, Zhigang Li
Wavelength-Selective Metamaterial Absorber And Emitter, Zhigang Li
Doctoral Dissertations
"Electromagnetic absorbers and emitters have been attracting interest in lots of fields, which are significantly revitalized because of the novel properties brought by the development of the metamaterials, the artificially designed materials. Metamaterials broadens the approaches to design the electromagnetic absorbers and emitters, making it possible to obtain the perfect absorption or emission at the wavelengths covering a wide range. Metamaterial absorbers and emitters are promising for various applications, including solar thermal-photovoltaics and thermal-photovoltaics for energy harvesting, chemical and biomedical sensors, nanoscale imaging and color printing. This work focuses on three aspects (materials, structures and design methods) to improve the …
Y2O3 Optical Constants Between 5 Nm And 50 Nm, Joseph B. Muhlestein, Benjamin D. Smith, Margaret Miles, Stephanie M. Thomas, Anthony Willey, David D. Allred, R. Steven Turley
Y2O3 Optical Constants Between 5 Nm And 50 Nm, Joseph B. Muhlestein, Benjamin D. Smith, Margaret Miles, Stephanie M. Thomas, Anthony Willey, David D. Allred, R. Steven Turley
Faculty Publications
We report optical constants of e-beam evaporated yttrium oxide Y2O3 thin films as determined from angle-dependent reflectance measurements at wavelengths from 5 to 50 nm. Samples were measured using synchrotron radiation at the Advanced Light Source. The experimental reflectance data were fit to obtain values for the index of refraction and thin film roughness. We compare our computed constants with those of previous researchers and those computed using the independent atom approximation from the CXRO website. We found that the index of refraction near 36 nm is much lower than previous data from Tomiki as reported by …