Nonlinear Organic Materials
Mostrando 1-9 de 9 artigos, teses e dissertações.
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1. Synthesis and Characterization of Non-Linear Optical Crystal of Manganese Mercury Thiocyanate Glycol Monomethyl Ether
The design and synthesis of organic nonlinear optical (NLO) crystals are a promising area of current research in materials science. Organic materials are found to possess better non linear optical properties when compared to inorganic materials. Recently, there has been a widespread interest in the metal-organic coordination compounds, which are a combinatio
Mat. Res.. Publicado em: 30/11/2017
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2. An overview of lignin metabolism and its effect on biomass recalcitrance
Lignin, after cellulose, is the second most abundant biopolymer on Earth, accounting for 30% of the organic carbon in the biosphere. It is considered an important evolutionary adaptation of plants during their transition from the aquatic environment to land, since it bestowed the early tracheophytes with physical support to stand upright and enabled long-dis
Braz. J. Bot.. Publicado em: 2012
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3. Relação entre a estrutura molecular e as propriedades de absorção de multi-fótons em compostos orgânicos π-conjugados / Structure-property relationship for multiphoton absorption process in π-conjugated organic compounds
Nesta tese estudamos a relação entre as propriedades de absorção de multi-fótons e a estrutura molecular de três classes distintas de compostos orgânicos π-conjugados: derivados de vitamina A, complexos de platina acetilada e compostos quirais. Materiais orgânicos emergiram nas últimas décadas como candidatos para aplicações em dispositivos fo
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/07/2011
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4. Propagação não linear de pulsos em estruturas 1D com band gap fotonico / Nonlinear pulse propagation in one-dimensional photonic band gap structures
The interaction of ultrashort optical pulses with photonic band gap materials has been studied by considering light propagation through one-dimensional photonic band gap structures, composed of a periodic multilayer stack of dielectric materials whose unitary cell consists of a pair of layers with different refractive indices n1and n2, respectively. One of t
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 17/08/2009
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5. Nonlinear optical properties of organic and organometallic compounds / Propriedades ópticas não lineares de compostos orgânicos e organometálicos
In the last few years, the design and characterization of novel materials exhibiting high optical nonlinearities is the subject of a fast-growing interest because of their potential application in various fields, from biology to photonics. Two-photon absorption processes, for example, have been used for optical limiting, three-dimensional microfabrication, o
Publicado em: 2009
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6. Hiperpolarizabilidades Semi-EmpÃricas de Sistemas OrgÃnicos Doador-Receptor
The research on new nonlinear materials finds in Quantum Chemistry the possibility of designing organic molecules with optimized performance. It is performed by matching adequate components of structure, that is, a bridge (B) and an efficient donor(D)/acceptor(A) pair. Hence, some classes of D/A organic molecules were designed and theoretically observed to h
Publicado em: 2001
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7. Growth and optical characterization of L-threonine and L-lysine-HCI crystals / Crescimento e caracterização óptica de cristais de L-treonina e L-lisina-HCL
In this work we grew and optically characterized L-threonine and L-lysine-HCL crystals. These materials belong to a family of organic crystals that have a potential application in nonlinear optical devices. The crystals were grown in aqueous solution by slow solvent evaporation and controlled cooling techniques. We characterized the linear and nonlinear opti
Publicado em: 1999
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8. DESENVOLVIMENTO E CARACTERIZAÇÃO DE DISPOSITIVOS FOTÔNICOS UTILIZANDO POLÍMEROS / DEVELOPMENT AND CHARACTERIZATION OF PHOTONIC DEVICES
Conjugated organic polymers are of wide interest as nonlinear optical materials because of their potential applications in photonic devices, such as communication devices. They have a large and fast nonlinear optical response, as well as a great flexibility in their preparing method. For device applications, the most important parameters are: third-order opt
Publicado em: 1996
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9. An investigation of the interrelationships between linear and nonlinear polarizabilities and bond-length alternation in conjugated organic molecules.
A computational method was devised to explore the relationship of charge separation, geometry, molecular dipole moment (mu), polarizability (alpha), and hyperpolariz-abilities (beta, gamma) in conjugated organic molecules. We show that bond-length alternation (the average difference in length between single and double bonds in the molecule) is a key structur