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 34 for “"optical processes"”.
-
Nanoscale Control of Gap-plasmon Enhanced Optical Processes
… been demonstrated to improve the performance of optical devices including ultrasensitive sensors, light emitters, and optical absorbers. A plasmon resonance mode of particular recent interest is the gap plasmon resonance that occurs on closely spaced metallic structures. In contrast to plasmon …
-
Linear and nonlinear optical processes in GaAs semiconductor microcavities
… in the time-domain. The role of longitudinal optical phonons in the relaxation dynamics is also investigated. Encouraging experimental results confirm the efficiency of this mechanism towards the formation of a ground state condensate.<br/><br/>Polariton condensation in 0D GaAs quantum well …
-
Control of Optical Processes in Diamond using Plasmonic Nanogap Cavities
<p>Solid-state quantum emitters embedded in carefully engineered nanostructures could enable a new generation of quantum information and sensing technologies, including networked processors for quantum computing and precise monitors of temperature and strain at the nanoscale. The primary goal when …
-
Nonlinear optical processes and the nearest neighbor distribution in rubidium vapor
Nonlinear optical processes, with a particular emphasis on parametric four-wave mixing (PFWM), are studied in rubidium vapor. A theoretical framework is introduced that enables accurate calculations of nonlinear light-matter interactions, and calculations of these interactions using this framework …
-
Optical Processes in Xenon: Multiphoton Ionization and Ultraviolet Photodissociation of the Dimer Ion
The coefficient for two-photon ionization of xenon at 193 nm has been measured using a microwave absorption scheme which determines peak electron densities. The electron-neutral collision frequency, (nu)(,m), has been obtained using a microwave bridge and the result is consistent with 0.7 eV …
-
Optical processes in xenon: Multiphoton ionization and ultraviolet photodissociation of the dimer ion
Submitted by Carolyn Mead (cmead2@illinois.edu) on 2011-06-09T18:07:47Z No. of bitstreams: 1 1983_mccown.pdf: 2864187 bytes, checksum: 4f71cae5d24766c4f3268969775f4bf4 (MD5)
-
Techniques in frequency conversion and time-resolved spectroscopy with nonlinear optical processes in the femtosecond regime
Nichtlineare Frequenzumsetzung der niederenergetischen femtosekunden Laserpulsen wurde in den Festkörpermitteln nachgeforscht. Ramanumwandlung im weiss-Licht-freien Regime des impulsiven stimulierten Raman Streuungs wurde erzielt, indem man KGW-Kristall mit den Bessel-Lichtstrahl pumpte. …
-
Optical Processes and Laser Dynamics in Holmium and Neodymium Upconversion -Pumped Visible and Ultraviolet Fluorozirconate Fiber Lasers
Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs
-
Optical Processes and Laser Dynamics in Holmium and Neodymium Upconverstion-Pumped Visible and Ultraviolet Fluorozirconate Fiber Lasers
Submitted by Jesse Garrison (jagarris@illinois.edu) on 2012-01-11T17:47:04Z No. of bitstreams: 1 1999_funk.pdf: 6183075 bytes, checksum: 37613374894e707519eef36ff6c08896 (MD5)
-
Optical processes in Kr and Kr2f, absolute cross sections for multiphoton ionization of Kr(1S0), photoionization of metastastable Kr* and Kr2*, and absorption of Kr2F (42gamma)
Submitted by Carolyn Mead (cmead2@illinois.edu) on 2011-06-03T14:11:37Z No. of bitstreams: 1 1986_geohegan.pdf: 6764728 bytes, checksum: 84a3b6ee81b8c90530bf9c9c178782cb (MD5)
-
Optical Processes in Krypton and Krypton(2)fluoride: Absolute Cross-Sections for Multiphoton Ionization of Krypton (1S(0)), Photoionization of Metastable Atomic and Molecular States of Krypton, Andabsorption of Krypton(2)fluoride (4-Doublet-Gamma)
A microwave absorption apparatus has been used to measure a cross section for the three-photon, resonantly-enhanced ionization of Kr(('1)S(,0)) at 193 nm. The presence of a two-photon resonance with the Kr 6p 3/2 (,2) level enabled the generation of large electron densities and a measurement of the …
-
Optimization of the MgS:Eu:Sm phosphor for potential use as an optically stimulated personnel dosimeter
… for laser stimulated personnel dosimeters. Optically stimulated luminescence (OSL) dosimeters are advantageous in that they provide a faster, isothermal dose measurement than conventional thermoluminescent dosimeters. The effects of activator concentration and chemical substituents are …
-
Second-order nonlinear optical interactions and cascading effects in thinorganic films
… of the dyes possessing second order nonlinear-optical properties are proposed. The work shows how nonlinear-optical processes in such structures can be implemented by electro-optical and opto-optical control circuit signals. In this paper we consider the complete cycle of fabrication of several …
-
Nonlinear Optical Spectroscopy of Gallium Arsenide Interfaces
… reasons. In this thesis, second-order nonlinear optical spectroscopy was used to probe the electronic structure of GaAs based interfaces in the near infrared. Second-order nonlinear optical spectroscopy possesses intrinsic interface sensitivity and a long penetration depth. This intrinsic …
-
Experimental and Numerical Investigations into Terahertz Time-Domain Spectroscopy
… by describing the theory behind the nonlinear optical mechanisms through which we generate and detect short pulses of THz radiation. Based on a coherent electro-optic detection scheme, our measurements trace out the oscillating electric field of the THz pulses generated from the optical mixing …
-
Semiclassical Modeling of Optical Properties of Molecules in Cavity Environments
… cavities especially in the context of modified optical properties using different semiclassical techniques. The first part concentrates on plasmonic cavities, in particular we investigate the behavior of coupling and lifetime of single molecules at plasmonic interfaces and how they depend on …
-
A master equation approach to nonlinear optics and chemical reactions
… statistical analysis of several nonlinear optical processes. As an introduction a master equation describing the time behaviour of the field in a general irreversible nonlinear interaction between an optical photon field and a number of two level atoms is given. This master equation is then …
-
Nonlinear optical emission and near-field enhancement effects in arrays of gold bowtie nano-antennas
… we focus on laser-induced damage, nonlinear optical emission, and a proof-of-concept for utilizing arrays of gold BNAs to enhance the forces in an optical trapping system. From FDTD simulations, the optical response of a single BNA is demonstrated to increase the local intensity by a factor …
-
Collective Phenomena in Excitonic Quantum Matter
… the Bose-Einstein condensation of optically active metastable excitons opens the door to nonlinear optical processes, coherent light generation, and exciton lasing. Though first predicted in the 1960s, these excitonic quantum phases have proven frustratingly difficult to implement …
Page 1 of 2