Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 121 for “"optical physics"”.
-
Characterization of a molded plastic array of ten microplasma jet devices
… has been developed at the Laboratory for Optical Physics and Engineering. These devices have provided the opportunity to investigate characteristics and potential applications of arrays of microplasma jets. In this thesis, the basic plasma physics in addition to the necessary fabrication …
-
Aluminum/aluminum oxide structured microplasma devices: Paschen's Law and applications
… and provide an attractive tool to study plasma physics by modifying the device geometry as desired. A wet electrochemical process, used for fabricating microscale cavities and developed at the Laboratory for Optical Physics and Engineering, provides an opportunity to investigate plasma …
-
Electromagnetically active artificial material comprising multidimensional microplasma photonic crystals
… have been realized in the Laboratory for Optical Physics and Engineering (LOPE) at the University of Illinois. Real-time tuning of the propagation properties of the crystals in the 110-170 GHz spectral interval has been achieved in such photonic crystals by changing the refractive index of …
-
The physics and chemistry of semiconductor nanocrystals in sol-gel derived optical microcavities
… platform in which to investigate the nonlinear optical properties of NCs. This thesis summarizes our present understanding of the chemistry of the incorporation process and the applications and underlying optical physics that was gleaned from studying these NC-doped sol-gel structures. Chapter 2 …
-
Exploration of 3D Nanoscale Image Sensor to Enable Logic and Sensing in Single Chip
… Synopsys Sentaurus tools. Using the Raytracing optical physics model, the optical response of the Nanowire Image sensor is simulated and photo-current response is observed. The measured optical generation and efficiency have been compared with PN Junction Photo detector and vertical Nanowire …
-
Light Scattering in Ultracold High Density Rubidium Vapor
… for research in atomic, molecular and optical physics as well as condensed matter physics. It became possible to do experiments under conditions that are hard to achieve in condensed matter systems but recently have been observed in atomic systems. Bose Einstein Condensation, the Mott …
-
Two classes of unconventional photonic crystals
… dielectric photonic crystals studied in optical physics. The first class of unconventional photonic crystal consists of atoms bound in an optical lattice. This is a "resonant photonic crystal", in which an underlying optical resonance modifies the usual band physics. I present a …
-
Precision Metrology with Ytterbium Ions for New Physics Search
Modern physics faces a growing discrepancy between the success of the Standard Model and the body of evidence pointing to the New Physics beyond it. A powerful method of New Physics searches is using quantum sensing tools based on Atomic, Molecular, and Optical physics. In particular, the modern …
-
Research Funding Patterns in the UK: With Special Reference to Analytical Science
… publications are considered within chemistry and physics and the general processes leading to the emergence of new disciplines are analysed with special reference to perceptions of analytical science as a new area which, in the present work, is deemed to be associated with those publications …
-
Applications of quantum measurement techniques: counterfactual quantum computation, spin hall effect of light, and atomic-vapor-based photon detectors
… several physical phenomena in atomic and optical physics, and quantum information science, by utilizing various types and techniques of quantum measurements. It is the deeper concepts of these measurements, and the way they are integrated into the seemingly unrelated topics investigated, …
-
Atomic beam techniques in a rubidium vapour cell
… a sealed vapour cell. A velocity selective optical pumping scheme was implemented to enable the detection of atoms of a particular velocity class travelling between two separated laser beams. This represents a new spectroscopic technique, the usefulness of which has been demonstrated through …
-
Optical study of InP related semiconductor alloys;spectroscopic ellipsometry
In this thesis, spectroscopic ellipsometry is used to study the effects of disorder, self-ordering, strain, and dopants on electronic band structure of InxGal-xP grown on GaAs, InxGa1_xP grown on GaP substrate with composition-graded InGaP buffer layer and lattice matched (AlxGa1_x)o.sino.sP grown …
-
Temperature measurement using rare earth doped fibre fluorescence
Optical fibre sensors have been developed to measure a wide range of parameters and in many circumstances show significant advantages over conventional measurement techniques. This thesis investigates a relatively new method of measuring temperature using optical fibres, known as the fluorescence …
-
Theory of density functionals
<p>Density functional theory is an alternative quantum mechanical theory that offers simple ways of performing calculations of the electronic properties of matter. Many different methods derive from density functional theory. The most appealing for its simplicity and rigor is the theory of Kohn and …
-
Microscopic imaging in turbid media
… characteristics (e.g. scattering anisotropy, optical thickness and geometric thickness). The turbid media (samples) used in the work presented in this thesis consist of polystyrene microspheres and semi-skimmed milk suspensions. In particular the work presented in this thesis is concerned with …
-
Quantum mechanics in complex systems
<p>This document should be considered in its separation; there are three distinct topics contained within and three distinct chapters within the body of works. In a similar fashion, this abstract should be considered in three parts. Firstly, we explored the existence of multiply-charged atomic ions …
-
Using coherence and interference to study the few body dynamics in simple atomic collisions systems
<p>"Atomic Collision experiments are best suited to sensitively test the few-body dynamics of simple systems. The few-body dynamics, in turn, can be sensitively affected by interference effects. However, an important requirement to observe interference effects in atomic scattering experiments is …
-
Birefringent Fabry-Perot sensors
… or strain. By using a highly birefringent optical fibre in their cavity, these sensors form two interferometers - one for each polarisation axis. As in the case of other fibre interferometers, each axial interferometer is extremely sensitive to temperature and strain. But this high …
-
Remote detection of laser generated ultrasonics by fibre optic interferometer
… fibre optics. There is little problem in using optical fibres for delivery of high power Q-switched pulses to excite acoustic waves in target materials. However, the use of fibre optic interferometers in remote detection of these pulses presents very significant signal to noise problems. This …
Page 1 of 7