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.
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Showing 1 to 20 of 46 for “"nonlinear optical properties"”.
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Nonlinear optical properties of nano structures
Nonlinear optical properties of nanoscale semiconductors had been a topic of intense research in recent years in attempts to realize all-optical communication systems. These semiconductor nanoclusters, in the range of 1-100nm are hosted in a dielectric material and are considered as a particular …
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Nonlinear optical properties of chiral media.
This thesis concerns nonlinear optical phenomena in liquids and at interfaces. Optical processes are considered in chiral liquids and at chiral surfaces to second order in the applied electric fields, and to third-order in fluids. Time-dependent perturbation theory is used to describe the response …
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Nonlinear optical properties of natural dyes based on optical resonance
Recent research shows that the study of optical properties of organic material natural dyes has gained much consideration. The specific functional groups in several natural dyes remain essential for the large nonlinear absorption expressed in terms of nonlinear optical susceptibilities or other …
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Theoretical studies of electronic and nonlinear optical properties conjugated polymers
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemistry, 1997.
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Ultrafast nonlinear optical properties of passive and active semiconductor devices
Nonlinear optical properties and ultrafast carrier dynamics of slab-coupled optical waveguide amplifiers, silicon nanowaveguides, and III-V semiconductor saturable Bragg reflectors are studied. The limits imposed by two photon absorption and free-carrier absorption on the gain and output powers of …
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Enhancing the Third-Order Nonlinear Optical Properties of Porphyrins and Molecular Wires
The third-order nonlinear optical (NLO) properties of indium tin oxide (ITO) thin films, Fe3+, Mn3+, Co2+ 5,10,15,20-tetrakis-4hydroxytetraphenyl)porphyrin (TPP) films, and a series of ethynyl-linked azobenzene oligomers were investigated using degenerate four wave mixing (DFWM) with 100 fs laser …
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Characterization and control of the nonlinear optical properties of dendritic silver nanoparticle clusters
In this dissertation, the properties of the energy transport in thin films of silver nanoparticles on dielectric surfaces are explored. Specifically, this dissertation will present experiments in which an ultrafast laser (~ 13 fs) centered at 800 nm is focused at normal incidence on a thin film of …
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Nonlinear optical properties of novel nanostructured ion implanted laser ablated silicon using femtosecond pulse excitation
The study of the nonlinear optical properties of novel nanostructured ion implanted and laser ablation of Silicon is motivated by the need for materials that exhibit large values of the real part of the third order nonlinear susceptibility ([chi]^{(3)}_{Re}). This property is essential for light …
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Some Linear and Nonlinear Optical Properties of Zincblende-Type Crystals in the Far-Infrared Region
Made available in DSpace on 2014-12-08T22:24:38Z (GMT). No. of bitstreams: 1 7000890.pdf: 2689935 bytes, checksum: f328804b1873a4284ac2256a453dc9f5 (MD5) Previous issue date: 1969
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Nonlinear Optical Properties and Structural Characteristics of Ionically Self-Assembled Nanoscale Polymer Films Influenced by Ionic Concentration and Incorporation of Monomer Chromophores
… order requisite for a second-order nonlinear optical response. However, films fabricated with a nonlinear optical (NLO) polymer result in significant cancellation of the chromophore orientations. This cancellation occurs by two mechanisms: competitive orientation due to the ionic …
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Carrier excitations and nonlinear optical effects in semiconductor quantum wells
… matrix formulation is used to investigate the nonlinear optical properties of semiconductor quantum-well devices. The generation of terahertz electromagnetic pulses from ultrafast optical pulse excitations of semiconductor heterostructures is studied in the time domain with a three-level model. …
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Organic materials for second-order nonlinear optics: Approaches to optimizing and stabilizing nonlinear optical effects
… research has been to establish the potential of nonlinear optics (NLO) to study relationships between chemical structure and properties of organic materials. Using properly constructed molecules or photoactive dopants, phenomena such as molecular relaxation, dipolar ordering, poling dynamics, and …
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Chemical Structure - Nonlinear Optical Property Relationships For A Series Of Two-photon Absorbing Fluorene Molecules
… current and emerging technologies exploit this optical nonlinearity including two-photon fluorescence imaging, three-dimensional microfabrication, site-specific photodynamic cancer therapy and biological caging studies. The two key features of this nonlinearity which make it an ideal candidate …
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Excitonic optical nonlinearities in semiconductors and semiconductor microstructures.
… dissertation describes the study of excitonic optical nonlinearities in semiconductors and semiconductor microstructures. The main emphasis is placed on the evolution of optical nonlinearities as one goes from bulk to quantum-confined structures. Included are experimental studies of …
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Development and Assessment of Pair Natural Orbitals Coupled Cluster Quadratic Response Properties
… less progress has been achieved for molecular properties associated with a system's interaction with electromagnetic fields. Advancing this area would enable accurate simulations of light–matter phenomena, such as nonlinear optical (NLO) processes, which are central to the development of …
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Theory of Quantum Degenerate Gases
… gas of partially condensed atoms; and sixth, the nonlinear optical properties of an atomic gases."
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A Platform for Practical Nanophotonic Systems Nitrides and Oxides for Integrated Plasmonic Devices
… have revolutionized the way we think of optical space (ε,µ), enabling us to engineer the refractive index almost at will, to confine light to the smallest of volumes, as well as to manipulate optical signals with extremely small foot prints and energy requirements. Throughout the past, …
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Probing Coherent States and Nonlinear Properties in Multifunctional Material Systems
… understanding of their coherent states and nonlinear optical properties. This study is aimed at characterizing, modeling, and controlling the fundamental electronic, phononic, and spin properties of several classes of materials through nonequilibrium and nonlinear light-matter interactions, …
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The physics and chemistry of semiconductor nanocrystals in sol-gel derived optical microcavities
… as a robust 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. …
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